Leptarma jamelense ( Rathbun, 1914 )

Lagare, Nickel Jean S., Mapi-Ot, Emmarie F., Molina, Ziljih S., Neri, Jemateo B., Nuñeza, Olga M. & Mendoza, Jose Christopher E., 2020, On a collection of freshwater and estuarine crabs (Crustacea: Brachyura) from Mindanao Island, the Philippines, Zootaxa 4868 (3), pp. 301-330 : 307-308

publication ID	https://doi.org/10.11646/zootaxa.4868.3.1
publication LSID	lsid:zoobank.org:pub:9C2F00BA-3400-4FB6-ABC2-0525B5E64696
DOI	https://doi.org/10.5281/zenodo.4443586
persistent identifier	https://treatment.plazi.org/id/8D6787D9-FFA1-FFCC-FF6D-3D2FFE31FF1B
treatment provided by	Plazi (2021-01-05 00:54:34, last updated 2024-11-29 11:35:55)
scientific name	Leptarma jamelense ( Rathbun, 1914 )
status

Treatment

Leptarma jamelense ( Rathbun, 1914) View in CoL

Figs. 3E View FIGURE 3 , 6 View FIGURE 6 E–H

Sesarma (Parasesarma) moluccensis jamelensis Rathbun 1914: 81 .

Sesarma (Parasesarma) molucense jamelense, Estampador 1937: 536 View in CoL ; 1959: 93.

Sesarma (Parasesarma) jamelensis, Tesch 1917: 178 ; Serène 1968: 108.

Parasesarma jamelense, Ng et al. 2008: 222 View in CoL ; Rahayu & Li 2013: 633 View Cited Treatment , figs. 1–3.— Shahdadi & Schubart 2017: 536 (list).

Material examined. 1 male, 10.6 by 9.7 mm, ( ZRC; NJL161013 ) Tagoloan River, Brgy. Poblacion, Tagoloan town , Misamis Oriental prov., coll. N. J Lagare, 24-25 Sep. 2016 .

Remarks. This species was described as Sesarma (Parasesarma) moluccensis jamelensis by Rathbun (1914) based on a few specimens collected from Point Jamelo (= Hamilo Point), Batangas Province, Luzon Island. Estampador (1937, 1959) subsequently reported this species from Taytay, Palawan Island, further to the southwest. The types remained un-illustrated until Rahayu & Li (2013) provided photographs and line drawings of the male holotype deposited in the Natural Museum of Natural History, Washington, D.C. (USNM). The last author (JCEM) has also examined the types at the USNM (catalog no. USNM 45917). The present male specimen from Tagoloan River resembles the holotype in the general shape of the carapace, pleon, and the leg proportions, as well as in having 10 tubercles on the dorsal surface of the chelar dactylus. It differs from the holotype, however, in having 9 and 15 teeth on the proximal and distal pectinated crests, respectively, (versus 10–11 and 16–18, respectively, in the holotype viz. Rahayu & Li (2013)), and in having a relatively longer chitinous distal tip on the G1 ( Figs. 6G, H View FIGURE 6 ). Shahdadi et al. (2020) recently revised the genus Parasesarma , wherein their molecular analyses revealed a distinct clade, which they called the Parasesarma leptosoma species-group (17 species including P. jamelense ). They established a new genus, Leptarma (type species: Sesarma leptosoma Hilgendorf ), for this group using both molecular and morphological characters (e.g., tuberculation pattern on the chelar dactyli). For the moment, we consider the Tagoloan specimen as conspecific with Leptarma jamelense , but recommend a comprehensive examination of all the Philippine material and comparisons with material of morphologically similar species such as P. liho Koller, Liu & Schubart, 2010 , originally described from Taiwan (see also Shahdadi et al. 2020, discussion on Leptarma ). The latter species has specimens recorded from Cebu Island in the Philippines ( Shih et al. 2019), which is about 200 km north of Tagoloan, across the Bohol Sea, as well.

New Mindanao record.

References

Estampador E. (1937) A check list of Philippine crustacean decapods. Philippine Journal of Science, 62 (4), 465 - 559.

Estampador, E. (1959) Revised check list of Philippine crustacean decapods. Natural & Applied Science Bulletin, 17, 1 - 125.

Koller, P., Liu, H. - C. & Schubart, C. D. (2010) A new semiterrestrial species of the genus Parasesarma De Man, 1895, from Taiwan (Crustacea: Decapoda: Brachyura: Sesarmidae). In: Fransen, C., De Grave, S. & Ng, P. K. L. (Eds.) Studies on Malacostraca: Lipke Bijdeley Holthuis Memorial Volume. Crustaceana Monographs, 14, 357 - 368. https: // doi. org / 10.1163 / 9789047427759 _ 024

Rahayu, D. L. & Li, J. J. (2013) A new species of the genus Parasesarma (Crustacea: Brachyura: Sesarmidae) from Taiwan and the Philippines, and redescription of P. jamelense (Rathbun, 1914). Raffles Bulletin of Zoology, 61 (2), 633 - 639.

Rathbun, M. J. (1914) Scientific results of the Philippine cruise of the fisheries steamer Albatross 1907 - 1910. No. 31. New species of crabs of the families Grapsidae and Ocypodidae. Proceeding of United States National Museum, 47, 69 - 85. https: // doi. org / 10.5479 / si. 00963801.2044.69

Serene, R. (1968) s. n. In: The Brachyura of the Indo-West Pacific region. Prodromus for a Check List of the Non-planctonic Marine Fauna of South East Asia. UNESCO & Singapore National Academy of Science, Singapore, Special Publication No. 1. Fauna III. CC 3. UNESCO & Singapore National Academy of Science, Singapore, pp. 33 - 112.

Shahdadi, A. & Schubart, C. D. (2017) Taxonomic review of Perisesarma (Decapoda: Brachyura: Sesarmidae) and closely related genera based on morphology and molecular phylogenetics: new classification, two new genera and the questionable phylogenetic value of the epibranchial tooth. Zoological Journal of the Linnean Society, 182, 517 - 548. https: // doi. org / 10.1093 / zoolinnean / zlx 032

Shahdadi, A., Fratini, S. & Schubart, C. D. (2020) Taxonomic reassessment of Parasesarma (Crustacea: Decapoda: Sesarmidae) based on genetic and morphological comparisons, with the description of a new genus. Zoological Journal of the Linnean Society, 2020, zlaa 025. [early online publication] https: // doi. org / 10.1093 / zoolinnean / zlaa 025

Shih, H. - T., Hsu, P. - Y., Shahdadi, A., Schubart, C. D. & Li, J. - J. (2019) The synonymy of the supratidal crab species Parasesarma cognatum Rahayu & Li, 2013 with P. liho Koller, Liu & Schubart, 2010 (Decapoda: Brachyura: Sesarmidae) based on morphological and molecular evidence, with a note on P. paucitorum Rahayu & Ng, 2009. Zoological Studies, 58, 21. https: // doi. org / 10.6620 / ZS. 2019.58 - 21

Tesch, J. J. (1917) Synopsis of the genera Sesarma, Metasesarma, Sarmatium and Clistocoeloma, with a key to the determination of the Indo-Pacific species. Zoologische Mededeelingen, 3, 127 - 260, pls. 15 - 17. https: // doi. org / 10.5962 / bhl. title. 10640

Figures

FIGURE 3. Colour photos of recently preserved crabs (dorsal habitus). A, Neosarmatium asiaticum Ragionieri, Fratini & Schubart, 2012, male, 37.0 by 30.0 mm (ZRC), Sindangan, Zamboanga del Norte; B, Neosarmatium fourmanoiri Serène, 1973, male, 40.6 by 33.8mm (ZRC), Sindangan, Zamboanga del Norte; C, Neosarmatium indicum (A. Milne-Edwards, 1868), male, 14.4 by 12.1 mm (ZRC), Basilisa, Dinagat Island; D, Parasesarma anambas Yeo, Rahayu & Ng, 2004, male, 8.6 by 7.0 mm (ZRC), Lianga, Surigao del Sur; E, Leptarma jamelense (Rathbun, 1914), male, 10.6 by 9.3 mm (ZRC), Tagoloan, Misamis Oriental; F, Parasesarma kuekenthali (De Man, 1902), male, 15.4 by 13.0 mm (ZRC), Basilisa, Dinagat I. Scale bars: 10 mm.

FIGURE 6. A–D, Parasesarma anambas Yeo, Rahayu & Ng, 2004, male, 8.6 by 7.0 mm (ZRC), Lianga, Surigao del Sur; E–H, Leptarma jamelense (Rathbun, 1914), male, 10.6 by 9.3 mm (ZRC), Tagoloan, Misamis Oriental.A, E, left chela, external view; B, F, left chela, dorsal view; C, G, right G1, pleonal view; D, H, right G1, sternal view. Scales: A, B, E, F = 2.0 mm; C, D, G, H = 1.0 mm.