identifier	taxonID	type	CVterm	format	language	title	description	additionalInformationURL	UsageTerms	rights	Owner	contributor	creator	bibliographicCitation
1924EBF2D2065BB5A1922E2E2BB32A2A.text	1924EBF2D2065BB5A1922E2E2BB32A2A.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Elimedon breviclunis Horton & Valls Domedel & Stewart & Hendrycks 2026	<div><p>Elimedon breviclunis sp. nov.</p><p>Figs 1, 2, 3, 4, 5</p><p>Type material.</p><p>Holotype: Pacific • female (with non-setose oostegites), 12.8 mm (dissected carcass); carcass and eight slides; Clarion-Clipperton Zone; 10.5313°N, 117.304°W; depth 4298 m; 13 / 11 / 2020; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-117.304&amp;materialsCitation.latitude=10.5313" title="Search Plazi for locations around (long -117.304/lat 10.5313)">NORI-D contract area</a>, RV " Maersk Launcher ", Cruise 5 A, Station SWM_022, Box Core BC_359; Specimen 5999_TH_AMP1; NHMUK 2025.10, COI (PV 077112), 16 S (PV 077021) . Paratypes: Pacific • immature (male), 9.2 mm; Clarion-Clipperton Zone; 10.359°N, 117.2405°W; depth 4298 m; 19 / 05 / 2021; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-117.2405&amp;materialsCitation.latitude=10.359" title="Search Plazi for locations around (long -117.2405/lat 10.359)">NORI-D contract area</a>, RV " Maersk Launcher ", Cruise 5 D, Station STM_190, Box Core BC_407; Specimen 7969_TH_AMP1; NHMUK 2025.11 . • male, 10.7 mm; Clarion-Clipperton Zone; 10.3333°N, 117.192°W; depth 4287 m; 31 / 05 / 2021; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-117.192&amp;materialsCitation.latitude=10.3333" title="Search Plazi for locations around (long -117.192/lat 10.3333)">NORI-D contract area</a>, RV " Maersk Launcher ", Cruise 5 D, Station STM_196, Box Core BC_419; Specimen 8595_TH_AMP_1; CMNC 2025 -0002 . • immature (damaged), 4.8 mm; Clarion-Clipperton Zone; 10.3559°N, 117.169°W; depth 4277 m; 11 / 11 / 2020; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-117.169&amp;materialsCitation.latitude=10.3559" title="Search Plazi for locations around (long -117.169/lat 10.3559)">NORI-D contract area</a>, RV " Maersk Launcher ", Cruise 5 A, Station STM_010, Box Core BC_355; Specimen 8802_TH_AMP1; NHMUK 2025.12, COI (PV 077022) 28 S (PV 077026), H 3 (PV 078006) . • immature, 6.5 mm; Clarion-Clipperton Zone; 10.3277°N, 117.184°W; depth 4284 m; 25 / 08 / 2022; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-117.184&amp;materialsCitation.latitude=10.3277" title="Search Plazi for locations around (long -117.184/lat 10.3277)">NORI-D contract area</a>, MV Island Pride, Cruise 7 A, Station TF_004, Box Core BC_430; Specimen 9350_TH_AMP3; NHMUK 2025.13, COI (PV 077115), 16 S (PV 077024), 28 S (PV 077028), H 3 (PV 078008) .</p><p>Other material.</p><p>Pacific • unsexed (urosome only), not measured; Clarion-Clipperton Zone; 10.3559°N, 117.169°W; depth 4277 m; 11 / 11 / 2020; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-117.169&amp;materialsCitation.latitude=10.3559" title="Search Plazi for locations around (long -117.169/lat 10.3559)">NORI-D contract area</a> RV " Maersk Launcher ", Cruise 5 A, Station STM_010, Box Core BC_355; Specimen 8803_TH_AMP_1; NHMUK 2025.15 . • immature (damaged), not measured; Clarion-Clipperton Zone; 10.3341°N, 117.185°W; depth 4284 m; 29 / 05 / 2021; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-117.185&amp;materialsCitation.latitude=10.3341" title="Search Plazi for locations around (long -117.185/lat 10.3341)">NORI-D contract area</a>, RV " Maersk Launcher ", Cruise 5 D, Station STM_199, Box Core BC_416; Specimen 8581_TH_AMP1; NHMUK 2025.14, COI (PV 077113) • immature, (damaged, not measured); Clarion-Clipperton Zone; 10.3575°N, 117.17°W; depth 4273 m; 09 / 09 / 2022; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-117.17&amp;materialsCitation.latitude=10.3575" title="Search Plazi for locations around (long -117.17/lat 10.3575)">NORI-D contract area</a>, MV " Island Pride ", Cruise 7 A, Station STM_173, Box Core BC_451; Specimen 9337_TH_AMP2; NHMUK 2025.16, COI (PV 077114), 16 S (PV 077023), 18 S (PV 077025), 28 S (PV 077027), H 3 (PV 078007) .</p><p>Type locality.</p><p>Abyssal Pacific Ocean, Clarion-Clipperton Zone, 10.5313°N, 117.304°W; depth 4298 m.</p><p>Diagnosis.</p><p>Mandibular palp article 3 short, 0.7 × length of article 2; gnathopod 1 carpus slightly longer than propodus (1.45 ×); Pereopods 5 and 6 bases, both narrow, length twice width; uropod 3 inner ramus strongly shortened, length 0.3 × outer ramus; telson long, length 1.5 × width, widely cleft and V-shaped, ~ 52 %.</p><p>Description.</p><p>Based on holotype immature female (non-setose oostegites), 12.8 mm, NHMUK 2025.10.</p><p>Body (Figs 1, 2): Pereonites 1 – 7 broader than deep. Pleonite 3 with a rounded, posterodorsal elevation slightly overhanging urosomite 1. Urosomite 1 with a slight dorsal concavity in front of acute carina, carina slightly pointing backward and overhanging urosomite 2. Urosomite 2 very short, telescoped under urosomite 1. Epimeron 1 quadrate, anterodistal corner slightly narrow. Epimeron 2 subquadrate, anterodistal corner rounded, distal margin convex, posterodistal corner not produced, posterior margin straight. Epimeron 3 ventral margin strongly convex, posterodistal corner produced into a long, slightly upturned tooth. Coxae 1 – 4 longer than corresponding pereonites, progressively longer, coxa 1 not shortened.</p><p>Head (Figs 1, 2): Approximately equal in length to pereonites 1 and 2; rostrum short, not reaching end of lateral cephalic lobe. Lateral cephalic lobe broadly triangular, subacute. Eye not present. Antenna 1 short, length 0.2 × body; peduncular article 1 dilated, length 1.3 × width, with slight dorsal keel projecting distally over article 2; peduncular articles 2 and 3 very short; flagellum 13 - articulate, first article of flagellum callynophorate, furnished medially with double row of aesthetascs; accessory flagellum 4 - articulate, first article slightly broader and equal to remaining articles combined, calceoli absent. Antenna 2 slightly longer than antenna 1, gland cone present (damaged on dissection); peduncular article 4 shorter than 5, with posteromedial setae; flagellum 17 - articulate, calceoli absent.</p><p>Mouthparts (Figs 1, 2, 3): Epistome straight, smooth, upper lip slightly dominant. Upper lip (Fig. 2, 3): broadly rounded. Mandible (Fig. 3): incisor convex and widened, with tooth at anterodistal and posterodistal corners; left lacinia mobilis 5 - dentate, right lacking; accessory spine row with two small spines; molar ovate and strongly triturative; palp attached distal to molar, article 2 1.43 × length of article 3, with 14 A 2 - setae, article 3 falciform, 0.7 × length of article 2, with 22 D 3 - pectinate setae and four E 3 - setae. Lower lip (Fig. 3): damaged. Maxilla 1 (Fig. 3): inner plate narrowing distally, inner margin with eight plumose setae; outer plate broad, with 11 spine-teeth in 6 / 5 crown arrangement; palp two-articulate, article 2 widened distally, with 13 contiguous conical apical spines, and eight facial setae. Maxilla 2 (Fig. 3): inner plate slightly shorter and broader than inner, tapering distally, both with row of pectinate medial marginal spines and setae. Maxilliped (Fig. 3): inner plate subrectangular, extending slightly past the distal end of the inner margin of palp article 1 and not reaching one-half of outer plate, distal margin with three nodular spines and three setae; outer plate narrowly subovate, length 2.15 × width, extending past the distal end of palp article 2, with three strong distal setae and 11 strong medial nodular spines, medial margin very slightly convex; palp setose medially, article 2 longest, article 4 slightly shorter than article 3.</p><p>Pereon: Gnathopod 1 (Fig. 2): coxa subrectangular, length 1.5 × width, anterior margin slightly convex, anterodorsal corner rounded, posterior margin nearly straight, distal margin straight; basis, anterior margin with short setae proximally and three long setae distally; ischium shorter than merus; carpus length 1.27 × propodus, posterior margin setose; propodus subchelate, subovate, palm acute, palmar corner defined by one medial and one lateral spine; dactylus narrow, overriding palm corner. Gnathopod 2 (Fig. 2): coxa subrectangular, length 2.2 × width; basis narrow, length 3.8 × width, margins lacking setae; ischium longer than merus; carpus length 1.45 × propodus; propodus subchelate, subovate, with anterodistal groups of long pectinate setae, hind margin setose, palm short, nearly transverse; dactylus overriding palm corner. Pereopod 3 (Fig. 4): coxa subrectangular, with anterior margin very slightly convex, posterior margin slightly concave, length 2.14 × width; merus slightly longer than carpus, posterior margins with clusters of long setae; propodus subequal in length to carpus, posterior margin setose; dactylus straight, shorter than propodus. Pereopod 4 (Fig. 4): coxa length 1.4 × width, anterior margin convex, posterior margin deeply excavate proximally, with wide subtriangular, posterodistal lobe located at distal 52 % of the coxa length, ventral margin straight; remaining pereopod articles as in pereopod 3. Pereopod 5 (Fig. 4): coxa slightly posterolobate, length twice width; basis length twice width, anterior margin spinose, posterior margin slightly convex, with short, narrow posterodistal lobe extending slightly past half of ischium; merus weakly expanded, slightly shorter than carpus, anterior margin with four slender spines; carpus anterior margin with six slender spines; propodus narrow, length equal to carpus, anterior margin with seven slender spines; dactylus straight, shorter than propodus. Pereopod 6 (Fig. 4): coxa strongly rounded, length twice width; basis length twice width, anterior margin slightly convex with small spines distally, posterior margin straight posterodistal lobe small and not extended distally; remaining pereopod articles as in pereopod 5 except merus-carpus slightly longer. Pereopod 7 (Fig. 4): coxa subtriangular, posterolobate; basis broadly expanded, length 1.4 × width, anterior margin with weak spines distally, posterior margin convex, with small serrations and setules, posterodistal lobe not extending distally; merus-propodus as in pereopod 6 but narrower, anterior margins of merus-carpus with long slender spines; dactylus missing.</p><p>Urosome (Figs 1, 5): Uropod 1 peduncle slightly longer than rami (partially broken and missing), dorsolateral and dorsomedial margins spinose, with&gt; 8 and&gt; 6 spines, respectively (peduncle broken); rami lanceolate, apically with a single inset spine, inner ramus slightly longer than outer, dorsolateral and dorsomedial margins with eight and 11 spines, respectively; outer ramus, dorsolateral margin with eight spines, dorsomedial margin lacking spines. Uropod 2 peduncle subequal in length to outer ramus, dorsolateral and dorsomedial margins with three and nine slender spines, respectively, dorsomedial spines long; rami lanceolate with apical inset spine, inner ramus longer than outer ramus, dorsolateral and dorsomedial margins with nine and six slender spines, respectively; outer ramus dorsolateral margin with five spines. Uropod 3 not extending past end of uropod 2, peduncle 0.86 × length of biarticulate outer ramus, with six distoventral spines; second article of outer ramus short, 0.2 × length of article 1, article 1 with four dorsolateral and one dorsomedial spine; inner ramus reduced, 0.3 × length of outer ramus, with one spine. Telson ~ 1.5 × longer than wide, widely cleft, and V-shaped, ~ 52 %, lobes strongly tapering distally with two lateral, submarginal spines and one apical spine in middle of lobe tip.</p><p>Oostegites present on gnathopod 2 and pereopods 3–5, but non-setose, slender, largest on gnathopod 2 and pereopods 3 and 4, slightly smaller on pereopod 5.</p><p>Gills present on gnathopod 2 and pereopods 3–6, lacking on pereopod 7.</p><p>Sexual dimorphism (Fig. 1). Male antenna 2 flagellum more elongate, with 42 articles.</p><p>Etymology.</p><p>The species name breviclunis is from the Latin: brevis, (f) meaning short, and clunis, (f) meaning rump or buttocks, thus alluding to the distinctively shortened and stout ‘‘ rump’ ’ area (pleon and urosome) of the amphipod.</p><p>Remarks.</p><p>The new species Elimedon breviclunis sp. nov. is more similar morphologically to E. cristatus J. L. Barnard. 1962, than it is to Ledoyer’s species E. brevicaudatus . Elimedon breviclunis sp. nov. has a telson which is quite long and deeply cleft, with widely separated lobes, in contrast to the much shortened and truncate telson of E. brevicaudatus . The uropod 3 inner ramus is very similar to E. zabka sp. nov., which is very shortened in contrast to E. cristatus which has an ordinary aequiramus condition of uropod 3. This has necessitated minor amendments to the genus diagnosis to account for the telson and uropod 3 inner ramus shortening which are variable among the four species now in the genus. A list of differences between the four species is provided in Table 2. These differences are minor but allow for the separation of the four species (for which a key is also provided).</p><p>Distribution. Abyssal Pacific Ocean, Clarion-Clipperton Zone, 4273–4299 m.</p><p>Molecular data. Sequence data for the holotype of Elimedon breviclunis sp. nov. is deposited in GenBank under accession numbers PV 077112 (COI) and PV 077021 (16 S). Sequences of the paratype and additional individuals of the species are deposited in GenBank with the following accession numbers: PV 077113 – PV 077115 (COI); PV 077022 – PV 077024 (16 S); PV 077025 (18 S); PV 078006 – PV 078008 (H 3); PV 077026 – PV 077028 (28 S). The species has also received a Barcode Index Number from Barcode of Life Data Systems: BOLD: AFV 0648 (https://www.doi.org/10.5883/BOLD:AFV0648).</p></div>	https://treatment.plazi.org/id/1924EBF2D2065BB5A1922E2E2BB32A2A	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Pensoft via Plazi	Horton, Tammy;Valls Domedel, Georgina;Stewart, Eva C. D.;Hendrycks, Ed A.	Horton, Tammy, Valls Domedel, Georgina, Stewart, Eva C. D., Hendrycks, Ed A. (2026): A revision of the genus Elimedon J. L. Barnard, 1962 (Crustacea, Amphipoda, Tryphosidae) with the addition of two new species from the Clarion-Clipperton Zone, Central Pacific Ocean. ZooKeys 1274: 119-140, DOI: 10.3897/zookeys.1274.139884
0761477746075799BAE6E90392AF5DBA.text	0761477746075799BAE6E90392AF5DBA.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Elimedon J. L. Barnard 1962	<div><p>Genus Elimedon J. L. Barnard, 1962</p><p>Elimedon J. L. Barnard, 1962: 24. ― J. L. Barnard 1964: 5. ― J. L. Barnard 1969: 345. ― Jarrett and Bousfield 1982: 105. ― Ledoyer 1986: 751. ― Barnard and Karaman 1991: 483.</p><p>Type species.</p><p>Elimedon cristatus J. L. Barnard, 1962 (original designation).</p><p>Included species.</p><p>Elimedon contains four species: Elimedon brevicaudatus (Ledoyer, 1986); E. breviclunis sp. nov.; E. cristatus J. L. Barnard, 1962; E. zabka sp. nov.</p><p>Diagnosis</p><p>(modified in italics after Barnard and Karaman 1991). Mouthparts forming quadrate bundle. Labrum and epistome not prominent, separate, labrum slightly dominant in projection, blunt. Incisor ordinary; molar triturative, large; palp attached opposite molar. Inner plate of maxilla 1 moderately (three) setose; palp bi-articulate, large. Inner and outer plates of maxilliped well developed, palp scarcely exceeding outer plate, dactyl well developed. Coxa 1 large and visible, not tapering. Gnathopod 1 short, strongly subchelate, palm acute, carpus longer than propodus, dactyl large; gnathopod 2 propodus much shorter than carpus, ordinary, propodus minutely subchelate. Inner ramus of uropod 2 without notch. Uropod 3 aequiramous or strongly reduced, peduncle ordinary, outer ramus bi-articulate. Telson elongated or shortened, cleft 50 %.</p><p>Remarks.</p><p>According to Barnard and Karaman (1991) the genus Elimedon differs from Hippomedon, (and Wecomedon) in possessing a shortened article 3 of the mandibular palp (half or less the length of article 2, compared to Hippomedon which has articles 2 and 3 approximately subequal). In addition, the bases of pereopods 5 and 6 are narrow in Elimedon versus broad in Hippomedon; and Elimedon lacks a gill on pereopod 7, while possession of a reduced gill on pereopod 7 is an important character for Hippomedon (Jarrett and Bousfield 1982) . The short antenna 2 of the female (~ 1.5 times as long as antenna 1) is also diagnostic for Elimedon . In Hippomedon, antenna 2 is elongate in both sexes.</p><p>Elimedon can be separated from the closely allied Paracentromedon in the telson being ~ 50 % cleft in Elimedon (versus ~ 75 % in Paracentromedon), and in the gnathopod 1 characters. In Paracentromedon the gnathopod 1 is almost simple with the carpus and propodus subequal, compared to the strongly subchelate gnathopod 1 of Elimedon with the carpus longer than propodus.</p></div>	https://treatment.plazi.org/id/0761477746075799BAE6E90392AF5DBA	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Pensoft via Plazi	Horton, Tammy;Valls Domedel, Georgina;Stewart, Eva C. D.;Hendrycks, Ed A.	Horton, Tammy, Valls Domedel, Georgina, Stewart, Eva C. D., Hendrycks, Ed A. (2026): A revision of the genus Elimedon J. L. Barnard, 1962 (Crustacea, Amphipoda, Tryphosidae) with the addition of two new species from the Clarion-Clipperton Zone, Central Pacific Ocean. ZooKeys 1274: 119-140, DOI: 10.3897/zookeys.1274.139884
17C89B07DB9B522DA7886DC825F07C8A.text	17C89B07DB9B522DA7886DC825F07C8A.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Elimedon zabka Horton & Valls Domedel & Stewart & Hendrycks 2026	<div><p>Elimedon zabka sp. nov.</p><p>Figs 6, 7, 8, 9, 10</p><p>Type material.</p><p>Holotype: Pacific • immature female, 3.5 mm; one slide; Clarion-Clipperton Zone; 19.465°N, 120.025°W; depth 4026 m; 20 / 03 / 2015; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-120.025&amp;materialsCitation.latitude=19.465" title="Search Plazi for locations around (long -120.025/lat 19.465)">Area of Particular Environment Interest No. 6 (APEI 6)</a>, RV " Thompson ", Cruise ABYSSLINE- 2, Station AB 2 - EB 13, Epibenthic Sledge; SMF 63356; COI (PQ 734642) .</p><p>Type locality.</p><p>Clarion-Clipperton Zone, 19.465°N, 120.025°W; depth 4026 m.</p><p>Distribution.</p><p>Abyssal Pacific Ocean, Clarion-Clipperton Zone, 4026 m.</p><p>Diagnosis.</p><p>Mandibular palp article 3 very short, 0.4 × length of article 2; gnathopod 1 carpus subequal to propodus; Pereopods 5 and 6 bases both narrow, length 2.1 × width; uropod 3 inner ramus shortened, length 0.56 × outer ramus; telson short, length equal to width, cleft and V-shaped, ~ 50 %.</p><p>Description.</p><p>Based on holotype immature female, 3.5 mm, SMF 63356.</p><p>Body (Figs 6, 7): Pereonites 1 – 7 (Fig. 6 A) broader than deep. Pleonite 3 (Fig. 6) with a rounded, posterodorsal elevation slightly overhanging urosomite 1. Urosomite 1 (Fig. 7) with a weak, posterodorsal carina and lateral ridge. Urosomite 2 (Fig. 7) short and not telescoped under urosomite 1. Urosomite 3 (Fig. 6) with a slightly elevated, rounded boss. Epimeron 1 (Fig. 7) quadrate, anterodistal corner rounded. Epimeron 2 (Fig. 7) subquadrate, anterodistal corner rounded, posterior margin convex, posterodistal corner not produced, ventral margin straight. Epimeron 3 (Fig. 7) anterodistal margin rounded, posterior margin convex, posterodistal corner produced into a small, upturned tooth, ventral margin slightly convex. Coxae 1 – 4 (Fig. 6 A) shorter than corresponding pereonites, coxae progressively longer, coxa 1 not shortened.</p><p>Head (Figs 6, 7): Slightly shorter than length of pereonites 1 and 2; rostrum short, not reaching end of lateral cephalic lobe. Lateral cephalic lobe (Fig. 7) broad, rounded apically. Eye not apparent in preserved specimen. Antenna 1 (Fig. 7) short, length ¼ of body; peduncular article 1 dilated, length 1.24 × width [uncompressed measurement is 1.72 from Fig. 6 A and 1.8 from Fig. 6 B], dorsal keel very slight; peduncular articles 2 and 3 very short; flagellum four or five articulate, first article of flagellum callynophorate, length equal to peduncle 1, furnished medially with double row of aesthetascs; accessory flagellum broken, calceoli absent. Antenna 2 likely slightly longer than antenna 1 (but flagellum missing), gland cone present; peduncular article 4 shorter than 5; flagellum broken off.</p><p>Mouthparts. Epistome (Fig. 6) approximately level with upper lip. Upper lip unknown, missing. Mandible (Fig. 8) incisor weakly convex, with tooth at posterodistal corner; left lacinia mobilis broad and finely serrate, accessory spine row with three small spines; molar lost during dissection; palp attached distal to molar, article 2 long, 2.55 × length of article 3, with four A 2 setae, article 3 short, 0.4 × length of article 2, with a single A 3 seta, four D 3 - pectinate setae, and one E 3 - seta. Lower lip unknown, missing. Maxilla 1 (Fig. 8) inner plate narrowly ovate with two apical plumose setae; outer plate with nine spine-teeth in 5 / 4 crown arrangement; palp bi-articulate (damaged), article 2 not widened distally, with five contiguous conical apical spines, one distolateral and one facial seta. Maxilla 2 (Fig. 8) inner plate slightly shorter and narrower than outer, tapering distally, both with rows of pectinate, apicomedial, marginal spines and setae, inner plate with one isolated plumose seta below. Maxilliped (Fig. 8) inner plate elongated, subrectangular, extending just past the distal end of the outer margin of palp article 1 and reaching 0.67 × length of outer plate, distal margin with two nodular spines and setae; outer plate narrowly subovate, length 2.0 × width, just reaching the distal end of palp article 2, with one strong distal spine and four medial nodular spines; palp weakly setose medially, articles subequal, article 4 slightly shorter than article 3.</p><p>Pereon. Gnathopod 1 (Fig. 7): coxa rectangular, length 1.6 × width, anterior margin very slightly convex, anterodorsal corner rounded, posterior margin slightly concave, distal margin straight; basis anterior margin with three or four medium setae; ischium shorter than merus; carpus subequal in length to propodus, posterior margin weakly setose; propodus subchelate, subrectangular, palm acute, convex, microserrate, palmar corner defined by two medial spines; dactylus narrow, strongly curved and reaching palm corner. Gnathopod 2 (Fig. 7): coxa rectangular, length 1.9 × width; basis narrow, length 6 × width, margins with a few setae; ischium length 1.66 × merus; carpus length 1.25 × propodus, with cluster of long setae anterodistally and posterodistally; propodus subchelate, subovate, with anterodistal groups of long pectinate setae, hind margin setose, palm short, defined by one lateral and one medial spine, nearly transverse; dactylus reaching palm corner. Pereopod 3 (Figs 6 A, 9): coxa rectangular, with anterior margin very slightly convex, posterior margin slightly concave, length 2.0 × width; merus longer than carpus, posterior margins of both articles with a few long setae; propodus longer than carpus, posterior margin setose; dactylus long, curved, and slightly shorter than propodus. Pereopod 4 (Figs 6 A, 9): coxa length 1.5 × width, anterior margin convex, posterior margin excavate proximally, with broad, truncated posterodistal lobe located at distal 40 % of the coxa length, ventral margin straight; remaining pereopod articles as in pereopod 3. Pereopod 5 (Fig. 9): coxa broadly subovate, length 1.5 × width; basis, length 2.1 × width, anterior margin spinose, posterior margin slightly convex, with short, posterodistal lobe extending to half-length of ischium; merus short, weakly expanded, shorter than carpus, anterior margin with two long setae and one distal spine, posterior margin with two spines; carpus anterior margin with two large and three small spines; propodus narrow, length 1.5 × carpus length, anterior margin with four spines; dactylus straight, shorter than propodus. Pereopod 6 (Fig. 9): coxa strongly posterolobate, rounded; basis length 2.1 × width, anterior margin sinuous with small spines distally, posterior margin convex with setules, posterodistal lobe extending to half-length of ischium; remaining pereopod articles as in pereopod 5 except merus-propodus 1.2 × longer. Pereopod 7 (Figs 6, 9): coxa subovate, posterolobate; basis broadly expanded, length 1.36 × width, anterior margin sinuous with weak spines distally, posterior margin strongly convex with setules, with three prominent serrations distally, posterodistal lobe broad just reaching distal end of ischium; merus-dactylus as in pereopod 6 but slightly narrower.</p><p>Urosome. Uropod 1 (Figs 6, 10): peduncle length 1.2 × rami, dorsolateral and dorsomedial margins weakly spinose; rami lanceolate, subequal, weakly spinose, apically with one inset spine. Uropod 2 (Figs 6, 10): peduncle length 1.3 × outer ramus, dorsolateral and dorsomedial margins with three and one spines, respectively; rami lanceolate with apical inset spine, inner ramus longer than outer ramus, dorsolateral margin with one spine; outer ramus partially broken [regenerated]. Uropod 3 (Figs 6, 10) not extending past end of uropod 2, peduncle subequal to length of biarticulate outer ramus, with three distoventral spines; second article of outer ramus 0.4 × length of article 1 [tip broken off], article 1 with two dorsolateral and two dorsomedial spines; inner ramus acute, reduced, length 0.56 × outer ramus. Telson (Figs 6, 10) short, length equal to width, lateral margins convex, cleft in a narrow V-shape, ~ 50 %, lobes with prominent apicomedial incision inset with a single small spine.</p><p>Etymology.</p><p>The species name Żabka is a Polish word meaning “ little frog ” and is used as a noun in apposition. The name has been chosen to honour the Sustainable Seabed Knowledge Initiative funded taxonomic workshop at the University of Lodz, Poland, which was the first Amphipod Workshop which GVD attended, and as a reminder of the friendships that were forged in the cold, snowy Polish winter.</p><p>Remarks.</p><p>The new species Elimedon zabka sp. nov. is described from a single specimen of unknown sex, 3.5 mm in length. Like E. breviclunis sp. nov. the uropod 3 inner ramus is strongly shortened, which differentiates these two new species from both E. cristatus which has an ordinary aequiramus condition of uropod 3, and E. brevicaudatus, which presents an intermediate, slightly shortened inner ramus. The telson in E. zabka sp. nov. is shortened (length equal to width), truncate with convex lateral margins, and cleft in a narrow V-shape which is most like the shortened and truncate telson of E. brevicaudatus .</p><p>Distribution.</p><p>Abyssal Pacific Ocean, Clarion-Clipperton Zone, 4026 m.</p><p>Molecular data.</p><p>Sequence data for the holotype of Elimedon zabka sp. nov. is deposited in GenBank under accession number PQ 734642. The species has also received a Barcode Index Number from Barcode of Life Data Systems: BOLD: AEB 4890 (https://www.doi.org/10.5883/BOLD:AEB4890).</p><p>COI sequences of Elimedon breviclunis showed zero intraspecific genetic divergence. The interspecific divergence between E. breviclunis and E. zabka was high, ranging from 29–31 %. This is unusual for two species within the same genus and further highlights the need for study of the relationships between Hippomedon and allied genera within the family Tryphosidae . The molecular sequences provided in this study will help in this process.</p></div>	https://treatment.plazi.org/id/17C89B07DB9B522DA7886DC825F07C8A	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Pensoft via Plazi	Horton, Tammy;Valls Domedel, Georgina;Stewart, Eva C. D.;Hendrycks, Ed A.	Horton, Tammy, Valls Domedel, Georgina, Stewart, Eva C. D., Hendrycks, Ed A. (2026): A revision of the genus Elimedon J. L. Barnard, 1962 (Crustacea, Amphipoda, Tryphosidae) with the addition of two new species from the Clarion-Clipperton Zone, Central Pacific Ocean. ZooKeys 1274: 119-140, DOI: 10.3897/zookeys.1274.139884
