taxonID	type	description	language	source
8B5D87DC9274FF93FF59FB0A9CC4F846.taxon	description	Category. Mascupod (Lowry & Myers 2019). Diagnostic description. Antenna 1 long, reaching to at least midpoint of peduncular article 5 of antenna 2 or short, not reaching midpoint of peduncular article 5 of antenna 2. Maxilliped palp article 2 without distomedial lobe; article 4 small, distinct. Male and female gnathopod 1 posterior margin of merus, carpus and propodus each with palmate lobes; propodus ‘ subtriangular’ with well-developed posterodistal lobe. Male and female gnathopod 2 subchelate. Male gnathopod 2 enlarged. Pereopods 3 – 7 simplidactylate. Pereopod 6 subequal in length or shorter than pereopod 7. Coxal gill 6 plate-like or weakly lobed, not complex or convoluted. Uropod 1 exopod with marginal robust setae in one row or without marginal robust setae. Uropod 3 ramus subequal in length, longer than or shorter than peduncle. Telson with apical robust setae only or with apical and marginal robust setae, with 1 – 6 robust setae per lobe.	en	Myers, Alan A., Park, Eunji, J. - P, Olivier (2025): A revision of the family Protorchestiidae (Amphipoda: Talitroidea) with the description of two new subfamilies, three new genera and one new species. Zootaxa 5725 (3): 371-390, DOI: 10.11646/zootaxa.5725.3.3, URL: https://doi.org/10.11646/zootaxa.5725.3.3
8B5D87DC9274FF93FF59FB0A9CC4F846.taxon	discussion	Discussion. The Protorchestiidae have simplidactylate pereopods, a character state shared only with the Uhlorchestiidae and Arcitalitridae. This distinguishes the Protorchestoidae from the cuspidactylate Talitroidae. They differ from the Uhlorchestiidae in retaining a small but distinct palp article 4 on the maxilliped (a rudimentary button in Uhlorchestiidae) and from the Arcitalitridae in having coxal gill 6 plate-like or weakly lobed (complexly structured, branched and often convoluted in Arcitalitridae).	en	Myers, Alan A., Park, Eunji, J. - P, Olivier (2025): A revision of the family Protorchestiidae (Amphipoda: Talitroidea) with the description of two new subfamilies, three new genera and one new species. Zootaxa 5725 (3): 371-390, DOI: 10.11646/zootaxa.5725.3.3, URL: https://doi.org/10.11646/zootaxa.5725.3.3
8B5D87DC9274FF93FF59FB0A9CC4F846.taxon	distribution	Distribution. South America; South Africa, East Africa; Madagascar; India; New Zealand, Australia; Thailand, Indonesia, New Guinea.	en	Myers, Alan A., Park, Eunji, J. - P, Olivier (2025): A revision of the family Protorchestiidae (Amphipoda: Talitroidea) with the description of two new subfamilies, three new genera and one new species. Zootaxa 5725 (3): 371-390, DOI: 10.11646/zootaxa.5725.3.3, URL: https://doi.org/10.11646/zootaxa.5725.3.3
8B5D87DC9277FF90FF59FA9F9DADF8AE.taxon	description	(Figs 2 – 3)	en	Myers, Alan A., Park, Eunji, J. - P, Olivier (2025): A revision of the family Protorchestiidae (Amphipoda: Talitroidea) with the description of two new subfamilies, three new genera and one new species. Zootaxa 5725 (3): 371-390, DOI: 10.11646/zootaxa.5725.3.3, URL: https://doi.org/10.11646/zootaxa.5725.3.3
8B5D87DC9277FF90FF59FA9F9DADF8AE.taxon	type_taxon	Type species. Parorchestia notabilis Barnard, 1935. Included species. C. lindsayae Lowry & Springthorpe, 2015; C. metcalfeae Lowry & Springthorpe, 2015; C. morini (Asari, 1998); C. morrumbene Lowry & Springthorpe, 2015; C. notabilis (Barnard, 1935); C. poka Lowry & Springthorpe, 2015; C. tulear Lowry & Springthorpe, 2015.	en	Myers, Alan A., Park, Eunji, J. - P, Olivier (2025): A revision of the family Protorchestiidae (Amphipoda: Talitroidea) with the description of two new subfamilies, three new genera and one new species. Zootaxa 5725 (3): 371-390, DOI: 10.11646/zootaxa.5725.3.3, URL: https://doi.org/10.11646/zootaxa.5725.3.3
8B5D87DC9277FF90FF59FA9F9DADF8AE.taxon	discussion	Remarks. Cochinorchestia Lowry & Peart differs from Microrchestia Bousfield in having oostegite setae with simple tips (Fig. 3), uropod 1 exopodite with marginal robust setae and a maxilliped palp article 2 with a medial lobe.	en	Myers, Alan A., Park, Eunji, J. - P, Olivier (2025): A revision of the family Protorchestiidae (Amphipoda: Talitroidea) with the description of two new subfamilies, three new genera and one new species. Zootaxa 5725 (3): 371-390, DOI: 10.11646/zootaxa.5725.3.3, URL: https://doi.org/10.11646/zootaxa.5725.3.3
8B5D87DC9277FF90FF59FC699C46FA9C.taxon	description	(Figs 2 – 3)	en	Myers, Alan A., Park, Eunji, J. - P, Olivier (2025): A revision of the family Protorchestiidae (Amphipoda: Talitroidea) with the description of two new subfamilies, three new genera and one new species. Zootaxa 5725 (3): 371-390, DOI: 10.11646/zootaxa.5725.3.3, URL: https://doi.org/10.11646/zootaxa.5725.3.3
8B5D87DC9277FF90FF59FC699C46FA9C.taxon	type_taxon	Type species. Parorchestia macrochela Bousfield, 1971. Included species. M. bousfieldi Lowry & Peart, 2010; M. macleayana (Haswell, 1879); M. macrochela (Bousfield, 1971); M. ntensis Lowry & Springthorpe, 2015; M. similis (Bousfield, 1971); M. watsonae Lowry & Peart, 2010.	en	Myers, Alan A., Park, Eunji, J. - P, Olivier (2025): A revision of the family Protorchestiidae (Amphipoda: Talitroidea) with the description of two new subfamilies, three new genera and one new species. Zootaxa 5725 (3): 371-390, DOI: 10.11646/zootaxa.5725.3.3, URL: https://doi.org/10.11646/zootaxa.5725.3.3
8B5D87DC9277FF90FF59FC699C46FA9C.taxon	discussion	Remarks. Microrchestia Bousfield differs from Cochinorchestia Lowry & Peart, in having oostegite setae with multifurcate tips (Fig. 3), maxilliped palp article 2 without a medial lobe and uropod 1 exopodite without marginal robust setae.	en	Myers, Alan A., Park, Eunji, J. - P, Olivier (2025): A revision of the family Protorchestiidae (Amphipoda: Talitroidea) with the description of two new subfamilies, three new genera and one new species. Zootaxa 5725 (3): 371-390, DOI: 10.11646/zootaxa.5725.3.3, URL: https://doi.org/10.11646/zootaxa.5725.3.3
8B5D87DC9277FF90FF59FF759FF7FC89.taxon	description	Diagnostic description. Antenna 1 long, reaching to at least midpoint of peduncular article 5 of antenna 2. Male and female gnathopod 1 posterior margin of merus, carpus and propodus each with palmate lobes. Gnathopod 2 subchelate in male, propodus palm often variously excavate, mitten-shaped in female. Pereopods 3 – 7 simplidactylate. Pereopod 6 subequal in length or shorter than pereopod 7. Coxal gill 6 plate-like with or without distinct lobes, not convoluted. Uropod 1 exopodite with or without marginal robust setae. Telson with apical robust setae only or with apical and marginal robust setae, with 1 – 6 robust setae per lobe. Oostegite setae with simple tips or multifurcate tips.	en	Myers, Alan A., Park, Eunji, J. - P, Olivier (2025): A revision of the family Protorchestiidae (Amphipoda: Talitroidea) with the description of two new subfamilies, three new genera and one new species. Zootaxa 5725 (3): 371-390, DOI: 10.11646/zootaxa.5725.3.3, URL: https://doi.org/10.11646/zootaxa.5725.3.3
8B5D87DC9277FF90FF59FF759FF7FC89.taxon	discussion	Discussion. The important distinctions between this subfamily and the Protorchestiinae subfam. nov. are the tips on the female oostegite setae that are curl or coil tipped in the Protorchestiinae subfam. nov., simple or multifurcate in the Microrchestiinae subfam. nov. (Fig. 3) and the palm of the male gnathopod 2 which is variously modified with excavations and protuberances in the Microrchestiinae subfam. nov., but unmodified, evenly rounded or substraigh t in the Protochestiinae subfam. nov. Some Microrchestiinae subfam. nov. have marginal robust setae on the exopodite of uropod 1 which are always absent in the Protorchestiinae subfam. nov. Some Microrchestiinae subfam. nov. have lobes on the coxal gills which are never present in the Protorchestiinae subfam. nov.	en	Myers, Alan A., Park, Eunji, J. - P, Olivier (2025): A revision of the family Protorchestiidae (Amphipoda: Talitroidea) with the description of two new subfamilies, three new genera and one new species. Zootaxa 5725 (3): 371-390, DOI: 10.11646/zootaxa.5725.3.3, URL: https://doi.org/10.11646/zootaxa.5725.3.3
8B5D87DC9277FF90FF59FF759FF7FC89.taxon	distribution	Distribution. India, Africa (Mozambique), Madagascar, Thailand, Indonesia, Papua New Guinea including the Bismark Archipelago and Northern Australia.	en	Myers, Alan A., Park, Eunji, J. - P, Olivier (2025): A revision of the family Protorchestiidae (Amphipoda: Talitroidea) with the description of two new subfamilies, three new genera and one new species. Zootaxa 5725 (3): 371-390, DOI: 10.11646/zootaxa.5725.3.3, URL: https://doi.org/10.11646/zootaxa.5725.3.3
8B5D87DC9276FF96FF59FBC99EA7FEAD.taxon	description	Diagnostic description. Antenna 1 short, not reaching midpoint of peduncular article 5 of antenna 2 or long, reaching midpoint or beyond midpoint of peduncular article 5 of antenna 2. Male and female gnathopod 1 posterior margin of merus, carpus and propodus each with palmate lobes. Male gnathopod 2 subovoid, propodus palm evenly convex to substraight without excavations or protuberances. Female gnathopod 2 mitten-shaped. Pereopods 3 – 7 simplidactylate. Pereopod 6 subequal in length or shorter than pereopod 7. Coxal gills large and plate-like without distinct lobes, unconvoluted. Uropod 1 exopodite without marginal robust setae. Telson with apical robust setae only. Female oostegite setae with curl or coil tips.	en	Myers, Alan A., Park, Eunji, J. - P, Olivier (2025): A revision of the family Protorchestiidae (Amphipoda: Talitroidea) with the description of two new subfamilies, three new genera and one new species. Zootaxa 5725 (3): 371-390, DOI: 10.11646/zootaxa.5725.3.3, URL: https://doi.org/10.11646/zootaxa.5725.3.3
8B5D87DC9276FF96FF59FBC99EA7FEAD.taxon	discussion	Discussion. Protorchestia species have previously been diagnosed with a 5 - dentate left lacinia mobilis on the mandible (4 - dentate in most other genera). However, the ancestral sister group to the talitroids, the Hyalidae, have a 5 – 8 dentate left lacinia mobilis (Bousfield & Hendrycks, 2002). The 5 - dentate state is therefore plesiomorphic in talitroids and should not be used in a phylogenetic classification. We consider that the short antenna 1 and weakly incrassate peduncle of antenna 2 of the South American Protorchestia nitida (Dana, 1852) (Fig. 4) distinguishes it from all other species previously attributed to Protorchestia. Eorchestia Bousfield, from South Africa, is the only genus in which the female gnathopod 1 apparently lacks a palmate lobe on the merus but the species are not well described and it can be confirmed only for E. rectipalma (Barnard, 1940), being neither described nor figured in the only other known species, E. dassenensis (Barnard, 1916). Three new genera are erected here: Lowryorchestia gen. nov., to accommodate two species from New Zealand one of which is described for the first time, Richardsonorchestia gen. nov. to accommodate two previously described species from Tasmania, and Serejorchestia gen. nov. to accommodate two species, one previously described from Tasmania and one from South Australia. The ancestral protorchestiids would have had continuous, if discrete, distributions in the continent of Gondwana, before it split into West Gondwana, the forerunner of Africa and South America and East Gondwana, the forerunner of Antarctica, Australia, New Guinea, Zealandia, India, Sri Lanka and Madagascar. By the early Cretaceous 130 Ma, a seaway had developed that separated populations in South America and South Africa from those in Zealandia and Australia for the first time since the close of the Jurassic (Myers, 2022).	en	Myers, Alan A., Park, Eunji, J. - P, Olivier (2025): A revision of the family Protorchestiidae (Amphipoda: Talitroidea) with the description of two new subfamilies, three new genera and one new species. Zootaxa 5725 (3): 371-390, DOI: 10.11646/zootaxa.5725.3.3, URL: https://doi.org/10.11646/zootaxa.5725.3.3
8B5D87DC9276FF96FF59FBC99EA7FEAD.taxon	distribution	Distribution. Chile: Cape Horn and Isla Navarino. South Africa: Natal. Namibia. New Zealand: North Island, South Island, Campbell Island. Australia: Tasmania and South Australia.	en	Myers, Alan A., Park, Eunji, J. - P, Olivier (2025): A revision of the family Protorchestiidae (Amphipoda: Talitroidea) with the description of two new subfamilies, three new genera and one new species. Zootaxa 5725 (3): 371-390, DOI: 10.11646/zootaxa.5725.3.3, URL: https://doi.org/10.11646/zootaxa.5725.3.3
8B5D87DC9271FF96FF59FB639C98F846.taxon	description	(Fig. 2)	en	Myers, Alan A., Park, Eunji, J. - P, Olivier (2025): A revision of the family Protorchestiidae (Amphipoda: Talitroidea) with the description of two new subfamilies, three new genera and one new species. Zootaxa 5725 (3): 371-390, DOI: 10.11646/zootaxa.5725.3.3, URL: https://doi.org/10.11646/zootaxa.5725.3.3
8B5D87DC9271FF96FF59FB639C98F846.taxon	type_taxon	Type species. Parorchestia rectipalma Barnard, 1940. Included species. E. rectipalma (Barnard, 1940); E. dassenensis (Barnard, 1916). Diagnostic description. Antenna 1 long, reaching end of antenna 2 peduncle. Mandible left lacinia mobilis 4 - dentate. Male gnathopod 1 posterior margin of merus, carpus and propodus each with palmate lobes. Female gnathopod 1 posterior margin of merus, without palmate lobe, posterior margin of carpus and propodus each with palmate lobes. Uropod 1 exopodite without marginal robust setae. Oostegite setae curl tipped.	en	Myers, Alan A., Park, Eunji, J. - P, Olivier (2025): A revision of the family Protorchestiidae (Amphipoda: Talitroidea) with the description of two new subfamilies, three new genera and one new species. Zootaxa 5725 (3): 371-390, DOI: 10.11646/zootaxa.5725.3.3, URL: https://doi.org/10.11646/zootaxa.5725.3.3
8B5D87DC9271FF96FF59FB639C98F846.taxon	discussion	Remarks. Eorchestia rectipalma (Barnard, 1940), the type species of the genus, was originally very incompletely described by Barnard (1940). His illustrations show a sexually dimorphic subchelate gnathopod 1 with palmate lobes on the merus, carpus and propodus in the male, but only on the carpus and propodus in the female. In the original description of Eorchestia, Bousfield (1984) gave no indication of material examined and provided no new illustrations. Based on the key in Griffiths (1976) one can infer that pereopod 7 is not sexually dimorphic. Eorchestia Bousfield, from South Africa, is the only genus in which the female gnathopod 1 lacks a palmate lobe on the merus but the species are not well described and that character state can be confirmed only for E. rectipalma (Barnard, 1940), being unknown in E. dassenensis (Barnard, 1916), the only other known species. The female oostegite setae apparently have curl tips. Habitat. Estuarine, beneath logs and debris washed up on the banks of an estuary.	en	Myers, Alan A., Park, Eunji, J. - P, Olivier (2025): A revision of the family Protorchestiidae (Amphipoda: Talitroidea) with the description of two new subfamilies, three new genera and one new species. Zootaxa 5725 (3): 371-390, DOI: 10.11646/zootaxa.5725.3.3, URL: https://doi.org/10.11646/zootaxa.5725.3.3
8B5D87DC9271FF96FF59FB639C98F846.taxon	distribution	Distribution. South Africa: Cape Peninsula (Barnard, 1916); St. Lucia (Griffiths, 1974 b); Kosi Bay (Griffiths, 1974 b); Richards Bay (Griffiths, 1974 b); Amalangha River (Griffiths, 1974 b); Umzimbazi River (Griffiths, 1974 b), Plettenberg Bay: Keurbooms River (Barnard, 1916, 1940); Port Edward (Griffiths, 1974 b). Namibia: Lüderitz Bay: Redford Bay (Griffiths, 1974 a).	en	Myers, Alan A., Park, Eunji, J. - P, Olivier (2025): A revision of the family Protorchestiidae (Amphipoda: Talitroidea) with the description of two new subfamilies, three new genera and one new species. Zootaxa 5725 (3): 371-390, DOI: 10.11646/zootaxa.5725.3.3, URL: https://doi.org/10.11646/zootaxa.5725.3.3
8B5D87DC9271FF96FF59FE8C99FCFB9F.taxon	description	(Figs 2 – 4)	en	Myers, Alan A., Park, Eunji, J. - P, Olivier (2025): A revision of the family Protorchestiidae (Amphipoda: Talitroidea) with the description of two new subfamilies, three new genera and one new species. Zootaxa 5725 (3): 371-390, DOI: 10.11646/zootaxa.5725.3.3, URL: https://doi.org/10.11646/zootaxa.5725.3.3
8B5D87DC9271FF96FF59FE8C99FCFB9F.taxon	type_taxon	Type species. Orchestia nitida Dana, 1852: 204. Included species. P. nitida (Dana, 1852). Diagnostic description. Antenna 1 short, not reaching beyond article 4 of antenna 2 peduncle. Antenna 2 weakly incrassate, article 4 much longer than wide. Mandible left lacinia mobilis 5 - dentate. Male and female gnathopod 1 posterior margin of merus, carpus and propodus each with palmate lobe. Male gnathopod 2 palm evenly convex. Pereopod 7 subequal in length with pereopod 6. Coxal gills plate-like, unbranched. Uropod 1 exopodite without marginal robust setae. Telson narrowing distally, lobes separated distally. Oostegite setae with curl tips.	en	Myers, Alan A., Park, Eunji, J. - P, Olivier (2025): A revision of the family Protorchestiidae (Amphipoda: Talitroidea) with the description of two new subfamilies, three new genera and one new species. Zootaxa 5725 (3): 371-390, DOI: 10.11646/zootaxa.5725.3.3, URL: https://doi.org/10.11646/zootaxa.5725.3.3
8B5D87DC9271FF96FF59FE8C99FCFB9F.taxon	discussion	Remarks. The short antenna 1 of Protorchestia nitida (Dana) which does not extend beyond article 4 of the peduncle of antenna 2, together with the weakly incrassate peduncle of antenna 2, distinguishes this genus from all other genera of Protorchestiinae. Habitat. Supralittoral, mainly under algae and stones, occasionally in tide pools, from mid-water to lower high-water levels (rarely under drift debris at high-water level) on protected and semi-protected beaches, occasionally in brackish water (Bousfield 1982).	en	Myers, Alan A., Park, Eunji, J. - P, Olivier (2025): A revision of the family Protorchestiidae (Amphipoda: Talitroidea) with the description of two new subfamilies, three new genera and one new species. Zootaxa 5725 (3): 371-390, DOI: 10.11646/zootaxa.5725.3.3, URL: https://doi.org/10.11646/zootaxa.5725.3.3
8B5D87DC9271FF96FF59FE8C99FCFB9F.taxon	distribution	Distribution. Chile: Cape Horn region; Puerto Robalo, Isla Navarino (Bousfield 1982).	en	Myers, Alan A., Park, Eunji, J. - P, Olivier (2025): A revision of the family Protorchestiidae (Amphipoda: Talitroidea) with the description of two new subfamilies, three new genera and one new species. Zootaxa 5725 (3): 371-390, DOI: 10.11646/zootaxa.5725.3.3, URL: https://doi.org/10.11646/zootaxa.5725.3.3
8B5D87DC9270FF94FF59F9C0984BFEF1.taxon	description	(Figs 3 – 9)	en	Myers, Alan A., Park, Eunji, J. - P, Olivier (2025): A revision of the family Protorchestiidae (Amphipoda: Talitroidea) with the description of two new subfamilies, three new genera and one new species. Zootaxa 5725 (3): 371-390, DOI: 10.11646/zootaxa.5725.3.3, URL: https://doi.org/10.11646/zootaxa.5725.3.3
8B5D87DC9270FF94FF59F9C0984BFEF1.taxon	type_taxon	Type species. Parorchestia campbelliana Bousfield, 1964: 7, figs 3 – 4. Included species. L. campbelliana (Bousfield, 1964); L. riparicola sp. nov. Habitat. Near rivers, river floodplains, seabird rookeries ..	en	Myers, Alan A., Park, Eunji, J. - P, Olivier (2025): A revision of the family Protorchestiidae (Amphipoda: Talitroidea) with the description of two new subfamilies, three new genera and one new species. Zootaxa 5725 (3): 371-390, DOI: 10.11646/zootaxa.5725.3.3, URL: https://doi.org/10.11646/zootaxa.5725.3.3
8B5D87DC9270FF94FF59F9C0984BFEF1.taxon	etymology	Etymology. In recognition of the tireless and dedicated research and publication on world talitroidean and lysianassoidean amphipods by the late Dr James K. Lowry. Diagnostic description. Antenna 1 long, reaching beyond end of peduncular article 4 of antenna 2. Mandible left lacinia mobilis 4 - dentate. Maxilla 1 palp small, 2 - articulate. Maxilla 2 endopodite shorter than exopodite, weakly truncate distally, lateral margin weakly setose. Maxilliped palp article 4 longer than broad. Gnathopod 1 with palmate lobes on merus, carpus and propodus in both sexes. Gnathopod 2 strongly sexually dimorphic, subchelate in male, mitten-shaped in female. Pereopods 3 – 7 simplidactylate and amplidactylate. Coxal gills unbranched, plate-like. Pleopods all well developed, naked or minutely setose, rami elongate and setose. Uropod 1 and 2 exopodites with naked margins. Female oostegite setae with coil tips.	en	Myers, Alan A., Park, Eunji, J. - P, Olivier (2025): A revision of the family Protorchestiidae (Amphipoda: Talitroidea) with the description of two new subfamilies, three new genera and one new species. Zootaxa 5725 (3): 371-390, DOI: 10.11646/zootaxa.5725.3.3, URL: https://doi.org/10.11646/zootaxa.5725.3.3
8B5D87DC9270FF94FF59F9C0984BFEF1.taxon	discussion	Remarks. Lowryorchestia is close to Protorchestia Bousfield, 1982, from which it differs in the longer antenna 1 which reaches more than half way along peduncular article 5 of antenna 2 and in the unexpanded peduncle of antenna 2. It differs from Eorchestia in having a palmate lobe on the merus of the female gnathopod 1.	en	Myers, Alan A., Park, Eunji, J. - P, Olivier (2025): A revision of the family Protorchestiidae (Amphipoda: Talitroidea) with the description of two new subfamilies, three new genera and one new species. Zootaxa 5725 (3): 371-390, DOI: 10.11646/zootaxa.5725.3.3, URL: https://doi.org/10.11646/zootaxa.5725.3.3
8B5D87DC9273FF94FF59FE709FE4FA27.taxon	description	(Figs 3, 5)	en	Myers, Alan A., Park, Eunji, J. - P, Olivier (2025): A revision of the family Protorchestiidae (Amphipoda: Talitroidea) with the description of two new subfamilies, three new genera and one new species. Zootaxa 5725 (3): 371-390, DOI: 10.11646/zootaxa.5725.3.3, URL: https://doi.org/10.11646/zootaxa.5725.3.3
8B5D87DC9273FF94FF59FE709FE4FA27.taxon	materials_examined	Type locality. Courrejolles Peninsula, Campbell Island, New Zealand. Holotype. Dominion Museum, New Zealand. Diagnostic description. Antenna 1 medium length, reaching to mid-point of antenna 2 peduncular article 5; flagellum shorter than peduncle. Antenna 2 short, flagellum a little longer than peduncle. Mandible left lacinia mobilis 4 - dentate. Maxilliped palp stout, article 4 distinct, cone-shaped, longer than basal width. Male and female gnathopod 1 merus, carpus and propodus each with palmate lobe. Male gnathopod 2 carpus small, cup-shaped; propodus large pyriform, palm very oblique with about 7 strong robust setae. Female gnathopod 2 mitten-shaped, merus, carpus and propodus each with palmate lobe. Pereopod 7 just longer than pereopod 6. Pleopods subequal, long, peduncular margins naked. Uropod 1 peduncle subequal to rami, distolateral robust seta one quarter length of exopodite; rami subequal; exopodite without marginal robust setae; endopodite with 4 marginal robust setae. Uropod 2 exopodite without marginal robust setae, endopodite with 2 rows of marginal robust setae. Uropod 3 peduncle with one marginal and one subdistal robust seta; ramus three quarters length of peduncle. Telson broadest medially and broad distally with a pair of unequal terminal robust setae and a pair of weak marginal robust setae on each side. Coxal gills plate-like, unbranched. Oostegite setae with coil tips. Habitat. Mollymawk rookery.	en	Myers, Alan A., Park, Eunji, J. - P, Olivier (2025): A revision of the family Protorchestiidae (Amphipoda: Talitroidea) with the description of two new subfamilies, three new genera and one new species. Zootaxa 5725 (3): 371-390, DOI: 10.11646/zootaxa.5725.3.3, URL: https://doi.org/10.11646/zootaxa.5725.3.3
8B5D87DC9273FF94FF59FE709FE4FA27.taxon	distribution	Distribution. Courrejolles Peninsula, Campbell Island, subantarctic New Zealand.	en	Myers, Alan A., Park, Eunji, J. - P, Olivier (2025): A revision of the family Protorchestiidae (Amphipoda: Talitroidea) with the description of two new subfamilies, three new genera and one new species. Zootaxa 5725 (3): 371-390, DOI: 10.11646/zootaxa.5725.3.3, URL: https://doi.org/10.11646/zootaxa.5725.3.3
8B5D87DC9273FF94FF59FE709FE4FA27.taxon	discussion	Remarks. This species is most similar to the other New Zealand species L. riparicola sp. nov. in the coil-tipped oostegites, but shares a few other character states with Protorchestia Bousfield (Table 1). Campbell Island lies on the submarine microcontinent of Zealandia, a key piece in the reconstruction of Gondwana (Grobys et al., 2014). There have been no shallow-water (<500 m) links to mainland New Zealand for Campbell and Auckland Island since the two volcanic islands were formed, apparently, in the Miocene. The high-tidal grass-dominated salt marsh on Campbell Island is similar in its extremely low species richness of benthic foraminifera to that reported from Tierra del Fuego at a similar latitude (Hayward et al. 2007). Ten percent of the fauna of Campbell Island has not been recorded from mainland New Zealand.	en	Myers, Alan A., Park, Eunji, J. - P, Olivier (2025): A revision of the family Protorchestiidae (Amphipoda: Talitroidea) with the description of two new subfamilies, three new genera and one new species. Zootaxa 5725 (3): 371-390, DOI: 10.11646/zootaxa.5725.3.3, URL: https://doi.org/10.11646/zootaxa.5725.3.3
8B5D87DC927DFF99FF59FB1D9C6AFBA1.taxon	description	(Figs 4 – 9)	en	Myers, Alan A., Park, Eunji, J. - P, Olivier (2025): A revision of the family Protorchestiidae (Amphipoda: Talitroidea) with the description of two new subfamilies, three new genera and one new species. Zootaxa 5725 (3): 371-390, DOI: 10.11646/zootaxa.5725.3.3, URL: https://doi.org/10.11646/zootaxa.5725.3.3
8B5D87DC927DFF99FF59FB1D9C6AFBA1.taxon	materials_examined	Type material. Holotype male, 10.0 mm. Foxton River Loop Reserve, Foxton, Horowhenua, New Zealand, coll. E. Park. September 5, 2018. (MNZ CR. 027930). Allotype 1 female, 7.5 mm, same data as holotype. (MNZ CR. 027931). Paratypes. 4 unsexed. same data as holotype. (MNZ CR. 027932). Other material. 4 juveniles, Webber Road, Whangaroa, Northland, New Zealand, coll. E. Park, 8, September, 2018 (MNZ CR. 027933). Type locality. Manawatu River in Foxton, North Island, New Zealand.	en	Myers, Alan A., Park, Eunji, J. - P, Olivier (2025): A revision of the family Protorchestiidae (Amphipoda: Talitroidea) with the description of two new subfamilies, three new genera and one new species. Zootaxa 5725 (3): 371-390, DOI: 10.11646/zootaxa.5725.3.3, URL: https://doi.org/10.11646/zootaxa.5725.3.3
8B5D87DC927DFF99FF59FB1D9C6AFBA1.taxon	etymology	Etymology. Latin: riparius = river bank, together with icola = dwelling	en	Myers, Alan A., Park, Eunji, J. - P, Olivier (2025): A revision of the family Protorchestiidae (Amphipoda: Talitroidea) with the description of two new subfamilies, three new genera and one new species. Zootaxa 5725 (3): 371-390, DOI: 10.11646/zootaxa.5725.3.3, URL: https://doi.org/10.11646/zootaxa.5725.3.3
8B5D87DC927DFF99FF59FB1D9C6AFBA1.taxon	description	Description. Male 6.0 – 10 mm Head. Eye large, one third length of head. Antenna 1 long, reaching to end of peduncle of antenna 2; flagellum a little shorter than peduncle with 7 articles. Antenna 2 peduncular article 5 longer than article 4, flagellum subequal in length with peduncle with 11 articles, the terminal article rudimentary. Mandible, left lacinia mobilis 4 - dentate. Maxilla 1 endopodite slender, bearing 2 terminal plumose setae; exopodite bearing 7 strong toothed robust setae; palp small, 2 - articulate. Maxilla 2 endopodite slightly shorter than expodite, weakly truncate distally, lateral margin weakly setose. Maxilliped exopodite relatively narrow, not arcuate, palp broad, article 3 distally broad, article 4 a little longer than broad. Pereon. Gnathopod 1 coxa deeper than wide, ventral margin with fine setae; basis slender, proximally narrow; merus with palmate lobe on posterior margin; carpus elongate, slender with posterodistal palmate lobe; propodus shorter than carpus, with posterodistal margin expanded into palmate lobe continuous with palm; dactylus shorter than palm. Gnathopod 2 coxa as wide as deep, distal margin convex with small setae, posterior margin with acute process; basis stout, parallel-sided; merus subequal in length with ischium; carpus very short, cup-shaped; propodus large, subovoid, palm smoothly convex, delimited from posterior margin by well-developed shelf bearing a single stout robust seta, palm with continuous array of strong robust setae; dactylus stout, overlapping shelf on posterodistal margin. Pereopods 3 – 7 simplidactylate. Pereopods 3 and 4 subsimilar, basidactylate, pereopod 4 slightly the longer. Pereopod 5 basis subovate; propodus approximately 1.25 x longer than carpus; dactylus stout. Pereopod 6 basis subovate, posterior margin weakly crenulate; propodus slender approximately 1.25 x length of carpus; dactylus stout. Pereopod 7 only a little longer than pereopod 6; basis with well-developed posterodistal rounded lobe, posterior margin crenulate; propodus slender, 1.5 times longer than carpus; dactylus slender. Gills on coxae 2 – 6 broad, plate-like unlobed. Pleon. Pleopods all well developed, pleopod 3 a little shorter that pleopods 1 and 2; peduncles naked; rami long, setose. Epimera 1 – 3, posteroventral corner with small spine with small seta inserted above it. Epimeron 3 with weak notch above spine. Uropod 1 peduncle outer margin with 4 long robust setae, inner margin with 2 robust setae, small distolateral robust seta 0.25 x length of outer ramus; rami shorter than peduncle; endopodite subequal in length with exopodite with two marginal robust setae, exopodite without dorsal robust setae. Uropod 2 peduncle outer margin with 2 large dorsal robust setae; rami subequal in length with peduncle; subequal in length with each other; endopodite with 3 marginal robust setae. Uropod 3 peduncle with three strong distal robust setae; ramus slender, about half length of peduncle, with 3 subequal apical robust setae. Telson slightly longer than wide, apically weakly incised, without marginal setae, with 1 apical robust seta on each side. Female. (Sexually dimorphic characters only), 7.0 mm. Gnathopod 1 similar to that of male but palmate lobes less well-developed. Gnathopod 2 mitten-shaped, merus, carpus and propodus with palmate lobes, carpus and propodus subequal in length. Oostegites broad with more than 30 setae with coil tips.	en	Myers, Alan A., Park, Eunji, J. - P, Olivier (2025): A revision of the family Protorchestiidae (Amphipoda: Talitroidea) with the description of two new subfamilies, three new genera and one new species. Zootaxa 5725 (3): 371-390, DOI: 10.11646/zootaxa.5725.3.3, URL: https://doi.org/10.11646/zootaxa.5725.3.3
8B5D87DC927DFF99FF59FB1D9C6AFBA1.taxon	discussion	Remarks. L. riparicola sp. nov. differs from all other species of Lowryorchestia by the elongate pereopod 7 (Fig. 8). It shares with the other New Zealand species L. campbelliana, the broadly rounded telson (terminally narrow in all other species. Bousfield (1964) illustrates the strongly coiled tips of the oostegites which appear to be exactly the same as those of L. riparicola sp. nov. A significant male bias is evident in the collected specimens of this species. Samples were collected with fine-mesh (<0.2 mm) hand nets. The observed bias may reflect sex-based behavioural or habitat differences, but quantitative research is needed to test this hypothesis. Habitat. On river banks.	en	Myers, Alan A., Park, Eunji, J. - P, Olivier (2025): A revision of the family Protorchestiidae (Amphipoda: Talitroidea) with the description of two new subfamilies, three new genera and one new species. Zootaxa 5725 (3): 371-390, DOI: 10.11646/zootaxa.5725.3.3, URL: https://doi.org/10.11646/zootaxa.5725.3.3
8B5D87DC927DFF99FF59FB1D9C6AFBA1.taxon	distribution	Distribution. New Zealand: North Island: Foxton (Horowhenua), Mokoia (Taranaki), South Featherston (Wellington), Kaeo (Northland). South Island: Cedarwood Reserve, Christchurch (Canterbury), Rangihaeata (Tasman).	en	Myers, Alan A., Park, Eunji, J. - P, Olivier (2025): A revision of the family Protorchestiidae (Amphipoda: Talitroidea) with the description of two new subfamilies, three new genera and one new species. Zootaxa 5725 (3): 371-390, DOI: 10.11646/zootaxa.5725.3.3, URL: https://doi.org/10.11646/zootaxa.5725.3.3
8B5D87DC927EFF99FF59FBB59912F94A.taxon	description	(Figs 2 – 5)	en	Myers, Alan A., Park, Eunji, J. - P, Olivier (2025): A revision of the family Protorchestiidae (Amphipoda: Talitroidea) with the description of two new subfamilies, three new genera and one new species. Zootaxa 5725 (3): 371-390, DOI: 10.11646/zootaxa.5725.3.3, URL: https://doi.org/10.11646/zootaxa.5725.3.3
8B5D87DC927EFF99FF59FBB59912F94A.taxon	type_taxon	Type species. Eorchestia palustris Richardson, 1993: 268, figs 1 – 3. Included species. R. palustris (Richardson, 1993); R. rupestris (Richardson, 1993).	en	Myers, Alan A., Park, Eunji, J. - P, Olivier (2025): A revision of the family Protorchestiidae (Amphipoda: Talitroidea) with the description of two new subfamilies, three new genera and one new species. Zootaxa 5725 (3): 371-390, DOI: 10.11646/zootaxa.5725.3.3, URL: https://doi.org/10.11646/zootaxa.5725.3.3
8B5D87DC927EFF99FF59FBB59912F94A.taxon	etymology	Etymology. In recognition of the work of Dr Alastair Richardson in describing the rich fauna of landhoppers in Tasmania. Diagnostic description. Antenna 1 long, reaching near to the end of peduncle of antenna 2. Mandible left lacinia mobilis 4 dentate. Maxilliped palp article 4 longer than broad. Gnathopod 1 with palmate lobes on merus, carpus and propodus in both sexes. Gnathopod 2 strongly sexually dimorphic, subchelate in male, mitten-shaped in female. Pereopods 3 – 7 simplidactylate and amplidactylate. Coxal gills unbranched, plate-like. Pleopods all well developed, peduncles naked or minutely setose; rami elongate and setose. Uropods 1 – 2 exopodites without marginal robust setae. Telson entire or weakly emarginate. Female oostegite setae with, curl tips.	en	Myers, Alan A., Park, Eunji, J. - P, Olivier (2025): A revision of the family Protorchestiidae (Amphipoda: Talitroidea) with the description of two new subfamilies, three new genera and one new species. Zootaxa 5725 (3): 371-390, DOI: 10.11646/zootaxa.5725.3.3, URL: https://doi.org/10.11646/zootaxa.5725.3.3
8B5D87DC927EFF99FF59FBB59912F94A.taxon	discussion	Remarks. Richardsonorchestia gen. nov. is close to Protorchestia Bousfield, from which it differs in the longer antenna 1 which reaches more than half way along peduncular article 5 of antenna 2 and unexpanded peduncle of antenna 2. It differs from Eorchestia in having a palmate lobe on the merus of the female gnathopod 1. It differs from Lowryorchestia in the distally narrow telson (Fig. 5) (distally broad in Lowryorchestia) and in having fewer setae on the female oostegites which terminate in curl tips (coil tips in Lowryorchestia). It differs from Serejorchestia in the undivided telsonic lobes (Fig. 5) and 4 - dentate left lacinia mobilis.	en	Myers, Alan A., Park, Eunji, J. - P, Olivier (2025): A revision of the family Protorchestiidae (Amphipoda: Talitroidea) with the description of two new subfamilies, three new genera and one new species. Zootaxa 5725 (3): 371-390, DOI: 10.11646/zootaxa.5725.3.3, URL: https://doi.org/10.11646/zootaxa.5725.3.3
8B5D87DC927EFF9EFF59F8A99FE1FC15.taxon	description	(Figs 3 – 5)	en	Myers, Alan A., Park, Eunji, J. - P, Olivier (2025): A revision of the family Protorchestiidae (Amphipoda: Talitroidea) with the description of two new subfamilies, three new genera and one new species. Zootaxa 5725 (3): 371-390, DOI: 10.11646/zootaxa.5725.3.3, URL: https://doi.org/10.11646/zootaxa.5725.3.3
8B5D87DC927EFF9EFF59F8A99FE1FC15.taxon	materials_examined	Holotype. Australian Museum P 41263. Diagnostic description. Antenna 1 long, extending just beyond distal end of antenna 2 article 5; flagellum subequal in length with peduncle. Antenna 2 short, flagellum a little longer than peduncle. Mandible left lacinia mobilis 4 - dentate. Maxilliped palp stout, article 4 distinct, longer than basal width. Male and female gnathopod 1 merus, carpus and propodus each with palmate lobe. Male gnathopod 2 carpus small, cup-shaped; propodus large pyriform, palm very oblique with about 7 strong robust setae. Female gnathopod 2 mitten-shaped, merus, carpus and propodus each with palmate lobe. Pereopod 7 slightly longer than pereopod 6. Pleopods subequal, long, peduncular margins naked. Uropod 1 peduncle subequal to rami, distolateral robust seta a little over one quarter length of exopodite; rami subequal; exopodite margins naked; endopodite with 3 marginal robust setae. Uropod 2 exopodite naked, endopodite with 2 robust setae. Uropod 3 peduncle with one marginal and one subdistal robust seta; ramus three-quarters length of peduncle without marginal robust setae. Telson weakly emarginate, a little longer than broad and narrowing distally with a pairs of unequal terminal robust setae and one pair of weak marginal setae. Coxal gills plate-like, unlobed. Oostegite setae with curled tips. Habitat. Cast weed and algal mat beside brackish creek behind dunes; at high water mark in saltmarsh; under oyster shells on mud at mid water.	en	Myers, Alan A., Park, Eunji, J. - P, Olivier (2025): A revision of the family Protorchestiidae (Amphipoda: Talitroidea) with the description of two new subfamilies, three new genera and one new species. Zootaxa 5725 (3): 371-390, DOI: 10.11646/zootaxa.5725.3.3, URL: https://doi.org/10.11646/zootaxa.5725.3.3
8B5D87DC927EFF9EFF59F8A99FE1FC15.taxon	distribution	Distribution. Tasmania: Nierinna Creek; Lagoons beach; Denison river; Sheepwash Bay; Western Bay; Detention River estuary.	en	Myers, Alan A., Park, Eunji, J. - P, Olivier (2025): A revision of the family Protorchestiidae (Amphipoda: Talitroidea) with the description of two new subfamilies, three new genera and one new species. Zootaxa 5725 (3): 371-390, DOI: 10.11646/zootaxa.5725.3.3, URL: https://doi.org/10.11646/zootaxa.5725.3.3
8B5D87DC927EFF9EFF59F8A99FE1FC15.taxon	discussion	Remarks. Richardsonorchestia palustris occurs in salt marshes (R. rupestris occurs on rocky shores). It differs from R. rupestris in the antenna 1 flagellum being shorter than the peduncle (longer than the peduncle in R. rupestris) and in the uropod 1 distolateral robust seta being less than one third the length of the exopodite (nearly half the length of exopodite in R. rupestris).	en	Myers, Alan A., Park, Eunji, J. - P, Olivier (2025): A revision of the family Protorchestiidae (Amphipoda: Talitroidea) with the description of two new subfamilies, three new genera and one new species. Zootaxa 5725 (3): 371-390, DOI: 10.11646/zootaxa.5725.3.3, URL: https://doi.org/10.11646/zootaxa.5725.3.3
8B5D87DC9279FF9EFF59FC14982DF8F7.taxon	description	(Figs 2, 5)	en	Myers, Alan A., Park, Eunji, J. - P, Olivier (2025): A revision of the family Protorchestiidae (Amphipoda: Talitroidea) with the description of two new subfamilies, three new genera and one new species. Zootaxa 5725 (3): 371-390, DOI: 10.11646/zootaxa.5725.3.3, URL: https://doi.org/10.11646/zootaxa.5725.3.3
8B5D87DC9279FF9EFF59FC14982DF8F7.taxon	materials_examined	Type locality. Fortescue Bay, Tasman Peninsula, Tasmania Holotype. Australian Museum P 41266. Diagnostic description. Antenna 1 long, extending to distal end of antenna 2 article 5; flagellum exceeding length of peduncle. Antenna 2 medium, flagellum 1.5 x length of peduncle. Mandible left lacinia mobilis 4 - dentate. Maxilliped palp stout, article 4 distinct, longer than basal width. Male and female gnathopod 1 merus, carpus and propodus each with palmate lobe. Male gnathopod 2 carpus small, cup-shaped; propodus large pyriform, palm very oblique with about 11 strong robust setae. Female gnathopod 2 mitten-shaped, merus, carpus and propodus each with palmate lobe. Pereopod 7 slightly longer than pereopod 6. Pleopods subequal, long, peduncular margins naked. Uropod 1 peduncle longer than rami, distolateral robust seta nearly half length of exopodite; rami subequal; exopodite margins without marginal robust setae; endopodite with 3 marginal robust setae. Uropod 2 exopodite without marginal robust setae, endopodite with 4 robust setae. Uropod 3 peduncle with three subdistal robust setae; ramus three-quarters length of peduncle without marginal robust setae. Telson entire, a little broader than long and narrowing distally with a pair of unequal terminal robust setae and one pair of weak marginal setae on each side. Coxal gills plate-like, unlobed. Oostegite setae with curl tips. Habitat. In reeds and vegetation litter at extreme high water; under rocks and gravel at high water, under cast kelp on boulders and sand, on beach under rocks at low tide.	en	Myers, Alan A., Park, Eunji, J. - P, Olivier (2025): A revision of the family Protorchestiidae (Amphipoda: Talitroidea) with the description of two new subfamilies, three new genera and one new species. Zootaxa 5725 (3): 371-390, DOI: 10.11646/zootaxa.5725.3.3, URL: https://doi.org/10.11646/zootaxa.5725.3.3
8B5D87DC9279FF9EFF59FC14982DF8F7.taxon	distribution	Distribution. Tasmania: Fortescue Bay, Tasman Peninsula; Swan Island, Bass Strait; Little Chinaman Bay, Forestier Peninsula; Cascades Bay, Koonya; Blackmans Bay; Cockburn Cove; Kelly Basin; Port Davey.	en	Myers, Alan A., Park, Eunji, J. - P, Olivier (2025): A revision of the family Protorchestiidae (Amphipoda: Talitroidea) with the description of two new subfamilies, three new genera and one new species. Zootaxa 5725 (3): 371-390, DOI: 10.11646/zootaxa.5725.3.3, URL: https://doi.org/10.11646/zootaxa.5725.3.3
8B5D87DC9279FF9EFF59FC14982DF8F7.taxon	discussion	Remarks. For differences between this species and R. palustris, see remarks section under that species.	en	Myers, Alan A., Park, Eunji, J. - P, Olivier (2025): A revision of the family Protorchestiidae (Amphipoda: Talitroidea) with the description of two new subfamilies, three new genera and one new species. Zootaxa 5725 (3): 371-390, DOI: 10.11646/zootaxa.5725.3.3, URL: https://doi.org/10.11646/zootaxa.5725.3.3
8B5D87DC927AFF9DFF59FB969EEDF816.taxon	description	(Figs 4 – 5)	en	Myers, Alan A., Park, Eunji, J. - P, Olivier (2025): A revision of the family Protorchestiidae (Amphipoda: Talitroidea) with the description of two new subfamilies, three new genera and one new species. Zootaxa 5725 (3): 371-390, DOI: 10.11646/zootaxa.5725.3.3, URL: https://doi.org/10.11646/zootaxa.5725.3.3
8B5D87DC927AFF9DFF59FB969EEDF816.taxon	type_taxon	Type species. Protorchestia lakei Richardson, 1996: 574 figs 1 – 4. Included species. S. ceduna (Serejo & Lowry, 2008); S. lakei (Richardson, 1996).	en	Myers, Alan A., Park, Eunji, J. - P, Olivier (2025): A revision of the family Protorchestiidae (Amphipoda: Talitroidea) with the description of two new subfamilies, three new genera and one new species. Zootaxa 5725 (3): 371-390, DOI: 10.11646/zootaxa.5725.3.3, URL: https://doi.org/10.11646/zootaxa.5725.3.3
8B5D87DC927AFF9DFF59FB969EEDF816.taxon	etymology	Etymology. In recognition of the work on the taxonomy of Australian and Brazilian Talitroidea and Hyaloidea by Dr Cristiana S. Serejo. Diagnostic description. Antenna 1, reaching from middle to near to the end of peduncle of antenna 2. Mandible left lacinia mobilis 5 - dentate. Maxilliped palp article 4 longer than broad. Gnathopod 1 with palmate lobes on merus, carpus and propodus in both sexes. Gnathopod 2 strongly sexually dimorphic, subchelate in male, mitten-shaped in female. Pereopods 3 – 7 simplidactylate and amplidactylate. Coxal gills unlobed, plate-like. Pleopods all well developed, peduncles naked or minutely setose; rami elongate and setose. Uropod 1 exopodite without marginal robust setae. Uropod 2 exopodite with or without marginal robust setae. Telson strongly cleft. Female oostegite setae with curl tips.	en	Myers, Alan A., Park, Eunji, J. - P, Olivier (2025): A revision of the family Protorchestiidae (Amphipoda: Talitroidea) with the description of two new subfamilies, three new genera and one new species. Zootaxa 5725 (3): 371-390, DOI: 10.11646/zootaxa.5725.3.3, URL: https://doi.org/10.11646/zootaxa.5725.3.3
8B5D87DC927AFF9DFF59FB969EEDF816.taxon	discussion	Remarks. Serejorchestia gen. nov. shares the divided telson lobes character state with Protorchestia but it differs from that genus in a number of ways. Antenna 1 extends midway along article 5 of antenna 2 (not reaching end of article 4 in Protorchestia), the peduncle of antenna 2 is short and unexpanded (long and incrassate in Protorchestia), the ramus of uropod 3 has no marginal robust setae (1 – 2 marginal robust setae in Protorchestia) and the female oostegites have fewer than 35 setae (more than 50 in Protorchestia). Serejorchestia gen. nov. is close to Richardsonorchestia gen. nov., from which it differs in the strongly divided telsonic lobes (Fig. 5) and the 5 - dentate left lacinia mobilis. It differs from Eorchestia in having a palmate lobe on the merus of the female gnathopod 1. It differs from Lowryorchestia in the distally narrow cleft telson (distally broad in Lowryorchestia) and in the female oostegites which terminate in curl tips (coil tips in Lowryorchestia).	en	Myers, Alan A., Park, Eunji, J. - P, Olivier (2025): A revision of the family Protorchestiidae (Amphipoda: Talitroidea) with the description of two new subfamilies, three new genera and one new species. Zootaxa 5725 (3): 371-390, DOI: 10.11646/zootaxa.5725.3.3, URL: https://doi.org/10.11646/zootaxa.5725.3.3
8B5D87DC9265FF82FF59FBF79C8CF847.taxon	description	(Fig. 5)	en	Myers, Alan A., Park, Eunji, J. - P, Olivier (2025): A revision of the family Protorchestiidae (Amphipoda: Talitroidea) with the description of two new subfamilies, three new genera and one new species. Zootaxa 5725 (3): 371-390, DOI: 10.11646/zootaxa.5725.3.3, URL: https://doi.org/10.11646/zootaxa.5725.3.3
8B5D87DC9265FF82FF59FBF79C8CF847.taxon	materials_examined	Type locality. Ceduna, Ayr Peninsula, South Australia. Holotype. Australian Museum P 69066. Diagnostic description. Antenna 1 long, extending to the distal end of article 5 of antenna 2; flagellum subequal in length with peduncle. Antenna 2 short, flagellum a little longer than peduncle. Mandible left lacinia mobilis 5 - dentate. Maxilliped palp stout, article 4 distinct, very small. Gnathopod 1 merus, carpus and propodus each with palmate lobe. Male gnathopod 2 carpus small, cup-shaped; propodus large pyriform, palm oblique with about 8 strong robust setae and 8 smaller robust setae. Female gnathopod 2 mitten-shaped, merus, carpus and propodus each with palmate lobe. Pereopod 7 only just longer than pereopod 6. Pleopods subequal, long, peduncular margins naked. Uropod 1 peduncle subequal to rami, distolateral robust seta one third to one half length of exopodite; rami subequal; endopodite with 3 marginal robust setae, exopodite margins without marginal robust setae. Uropod 2 endopodite with 3 marginal robust setae, exopodite with 1 or 2 marginal robust setae. Uropod 3 peduncle with one marginal and two subdistal robust setae; ramus slender, subequal in length with peduncle without marginal robust setae. Telson strongly cleft, much longer than broad, narrowing and with separated lobes distally, with a pair of unequal terminal robust setae on each side. Coxal gills plate-like, unlobed. Oostegite setae with curl tips. Habitat. Mangrove and marshes	en	Myers, Alan A., Park, Eunji, J. - P, Olivier (2025): A revision of the family Protorchestiidae (Amphipoda: Talitroidea) with the description of two new subfamilies, three new genera and one new species. Zootaxa 5725 (3): 371-390, DOI: 10.11646/zootaxa.5725.3.3, URL: https://doi.org/10.11646/zootaxa.5725.3.3
8B5D87DC9265FF82FF59FBF79C8CF847.taxon	distribution	Distribution. South Australia: Ceduna (32 o 8.87 ’ S 133 o 40.24 E), Baird Bay, (33 o 43 ’ S 134 o 16.63 ’ E); North Beach, Wallaroo (33 o 54.51 ’ S 137 o 37.77 ’ E); Franklin Harbour, Cowell (33 o 41.26 ’ S 136 o 55.65 ’ E). Victoria: Port Albert (38 o 40.23 ’ S 146 o 41.86 ’ E).	en	Myers, Alan A., Park, Eunji, J. - P, Olivier (2025): A revision of the family Protorchestiidae (Amphipoda: Talitroidea) with the description of two new subfamilies, three new genera and one new species. Zootaxa 5725 (3): 371-390, DOI: 10.11646/zootaxa.5725.3.3, URL: https://doi.org/10.11646/zootaxa.5725.3.3
8B5D87DC9265FF82FF59FBF79C8CF847.taxon	discussion	Remarks. Serejorchestia ceduna (Serejo & Lowry, 2008) differs from S. lakei (Richardson) in its longer antenna 1 which extends to the end of article 5 of antenna 2 (extending only about half way along article 5 of antenna 2 in S. lakei), in having marginal robust setae on the exopodite of uropod 2 (marginally naked in in S. lakei) and in having a slender uropod 3 ramus subequal in length with the peduncle (broader and about three quarters length of peduncle in S. lakei).	en	Myers, Alan A., Park, Eunji, J. - P, Olivier (2025): A revision of the family Protorchestiidae (Amphipoda: Talitroidea) with the description of two new subfamilies, three new genera and one new species. Zootaxa 5725 (3): 371-390, DOI: 10.11646/zootaxa.5725.3.3, URL: https://doi.org/10.11646/zootaxa.5725.3.3
8B5D87DC9265FF82FF59FF759D92FC74.taxon	description	(Figs 3 – 5)	en	Myers, Alan A., Park, Eunji, J. - P, Olivier (2025): A revision of the family Protorchestiidae (Amphipoda: Talitroidea) with the description of two new subfamilies, three new genera and one new species. Zootaxa 5725 (3): 371-390, DOI: 10.11646/zootaxa.5725.3.3, URL: https://doi.org/10.11646/zootaxa.5725.3.3
8B5D87DC9265FF82FF59FF759D92FC74.taxon	materials_examined	Type locality. Maatsuyker Island, Tasmania. Holotype. Australian Museum P 45574. Diagnostic description. Antenna 1 medium, extending halfway along article 5 of antenna 2; flagellum subequal in length with peduncle. Antenna 2 short, flagellum a little longer than peduncle. Mandible left lacinia mobilis 5 - dentate. Maxilliped palp stout, article 4 distinct, longer than basal width. Gnathopod 1 merus, carpus and propodus each with palmate lobe. Male gnathopod 2 carpus small, cup-shaped; propodus large pyriform, palm very oblique with many strong robust setae. Female gnathopod 2 mitten-shaped, merus, carpus and propodus each with palmate lobe. Pereopod 7 a little longer than pereopod 6. Pleopods subequal, long, peduncular margins naked. Uropod 1 peduncle longer than subequal length rami; distolateral robust seta less than half length of exopodite; endopodite with 2 marginal robust setae, exopodite without marginal robust setae. Uropod 2 exopodite without marginal robust setae, endopodite with 2 marginal robust setae. Uropod 3 peduncle with one marginal and two subdistal robust setae; ramus three quarters length of peduncle without marginal robust setae. Telson strongly cleft, a little longer than broad, narrowing and with separated lobes distally with a pairs of unequal terminal robust setae and one pair of weak marginal setae on each side. Coxal gills plate-like, unlobed. Oostegite setae with curl tips. Habitat. In vegetation and seepage near sea-bird rookery, in thin films of water over stones and wood.	en	Myers, Alan A., Park, Eunji, J. - P, Olivier (2025): A revision of the family Protorchestiidae (Amphipoda: Talitroidea) with the description of two new subfamilies, three new genera and one new species. Zootaxa 5725 (3): 371-390, DOI: 10.11646/zootaxa.5725.3.3, URL: https://doi.org/10.11646/zootaxa.5725.3.3
8B5D87DC9265FF82FF59FF759D92FC74.taxon	distribution	Distribution. Known only from the type locality.	en	Myers, Alan A., Park, Eunji, J. - P, Olivier (2025): A revision of the family Protorchestiidae (Amphipoda: Talitroidea) with the description of two new subfamilies, three new genera and one new species. Zootaxa 5725 (3): 371-390, DOI: 10.11646/zootaxa.5725.3.3, URL: https://doi.org/10.11646/zootaxa.5725.3.3
8B5D87DC9265FF82FF59FF759D92FC74.taxon	discussion	Remarks. For differences between this species and S. ceduna (Serejo & Lowry) see the remarks under that species.	en	Myers, Alan A., Park, Eunji, J. - P, Olivier (2025): A revision of the family Protorchestiidae (Amphipoda: Talitroidea) with the description of two new subfamilies, three new genera and one new species. Zootaxa 5725 (3): 371-390, DOI: 10.11646/zootaxa.5725.3.3, URL: https://doi.org/10.11646/zootaxa.5725.3.3
