Abstract
A new species of semi-terrestrial crab of the family Potamidae, Rathbunamon chumomrayense sp. nov. is described from Chu Mom Ray National Park, the Central Highlands of Vietnam. The new species can be distinguished from R. lacunifer (Rathbun, 1904), the only other species in the genus, by a suite of characters, including the slightly more rugose anterolateral regions, confluent epigastric and postorbital cristae that are sinuous, less convex anterolateral margins, relatively shorter fingers of the chelipeds, and the terminal segment of the male first gonopod being slightly curved outwards, with narrower dorsal flap.
References
Dang, N.T. & Ho, T.H. (2012) Tom, Cua nuoc ngot Viet Nam (Palaemonidae, Atyidae, Parathelphusidae, Potamidae). [= Freshwater Crabs and Shrimps from Vietnam (Palaemonidae, Atyidae, Parathelphusidae, Potamidae)]. The Publishing House for Science and Technology, Hanoi, 264 pp. [in Vietnamese]
Dang, N.T., Thai, T.B. & Pham, V.M. (1980) Dinh loai dong vat khong xuong song nuoc ngot Bac Viet Nam [=Identification of freshwater invertebrate in North Vietnam]. The Publishing House for Science and Technology, Hanoi, 573 pp. [in Vietnamese]
Do, V.T. (2014) Freshwater crabs of Vietnam: diversity and conservation. Journal of Vietnamese Environment, 6, 109–114.
http://dx.doi.org/10.13141/jve.vol6.no2.pp109-114Do, V.T., Le, H.A. & Nguyen, T.C. (2016) A new species of the genus Indochinamon Yeo & Ng, 2007 (Crustacea: Brachyura: Potamoidea: Potamidae) from northern Vietnam. The Raffles Bulletin of Zoology, 64, 187–193.
Do, V.T., Le, V.T. & Phan, D.D. (2015) Binhthuanomon vinhtan, a new genus and new species of semi-terrestrial freshwater crab (Crustacea: Decapoda: Brachyura: Potamidae) from south central Vietnam. Zootaxa, 4052 (1), 117–126. http://dx.doi.org/10.11646/zootaxa.4052.1.6
Do, V.T., Shih, H.T. & Huang, C. (2016) A new species of freshwater crab Tiwaripotamon Bott, 1970 (Crustacea, Brachyura, Potamidae) from northern Vietnam and southern China. The Raffles Bulletin of Zoology, 64, 213–219.
IUCN (2001) IUCN Red List Categories and Criteria: Version 3.1. IUCN Species Survival Commission. IUCN, Gland and Cambridge, ii + 30 pp.
Naiyanetr, P. (1992) Demanietta sirikit n. sp., a new freshwater crab from Thailand. Crustaceana, 62 (2), 113–120.
http://dx.doi.org/10.1163/156854092X00668Naruse, T., Nguyen Xuan, Q. & Yeo, D.C.J. (2011) Three new species of Indochinamon Yeo & Ng, 2007 (Crustacea: Brachyura: Potamoidea: Potamidae) from Vietnam, with a redescription of Ranguna (Ranguna) kimboiensis Dang, 1975. Zootaxa, 2732, 33–48.
Ng, P.K.L. (1988) The freshwater crabs of peninsular Malaysia and Singapore. Department of Zoology, University of Singapore, Shinglee Press, Singapore, 156 pp.
Ng, P.K.L. (1992) A new genus and species of cavernicolous crab (Brachyura: Potamidae) from Kanchanaburi, Thailand, with comments on the genera Tiwaripotamon Bott, 1970 and Larnaudia Bott, 1966. Mémoires de Biospéologie, 19, 159–167.
Ng, P.K.L. (1996) Establishment of two new genera for Potamon lacunifer Rathbun, 1904, and Potamon laosensis Rathbun, 1904 (Brachyura, Potamidae) from Laos. Crustaceana, 69 (7), 898–906.
http://dx.doi.org/10.1163/156854096X00295Ng, P.K.L. & Naiyanetr, P. (1995) Pudaengon, a new genus of terrestrial crabs (Crustacea: Decapoda: Brachyura: Potamidae) from Thailand and Laos, with descriptions of seven new species. The Raffles Bulletin of Zoology, 43 (2), 355–376.
Ng, P.K.L. & Yeo, D.C.J. (2001) A revision of the genus Tiwaripotamon Bott, 1970 (Decapoda: Brachyura: Potamidae), with a description of a new species. Journal of Crustacean Biology, 21 (1), 275–287.
http://dx.doi.org/10.1163/20021975-99990123Ortmann, A.E. (1896) Das System der Decapoden-Krebse. Zoologische Jahrbücher. Abteilung für Systematik, Geographie und Biologie der Thiere, 9, 409–453.
Yeo, D.C.J. & Ng, P.K.L. (1998) Freshwater crabs of the Potamon tannanti species group (Crustacea : Decapoda : Brachyura : Potamidae) from northern Indochina. Raffles Bulletin of Zoology, 46, 627–650.
Yeo, D.C.J. & Ng, P.K.L. (2003) Recognition of two subfamilies in the Potamidae Ortmann, 1896 (Brachyura, Potamidae) with a note on the genus Potamon Savigny, 1816. Crustaceana, 76 (10), 1219–1235.
http://dx.doi.org/10.1163/156854003773123456Yeo, D.C.J. & Ng, P.K.L. (2007) On the genus “Potamon” and allies in Indochina (Crustacea: Decapoda: Brachyura: Potamidae). The Raffles Bulletin of Zoology, Supplement No. 16, 273–308.
Yeo, D.C.J., Ng, P.K.L., Cumberlidge, N., Magalhães, C., Daniels, S.R. & Campos, M.R. (2008) Global diversity of crabs (Crustacea: Decapoda: Brachyura) in freshwater. Hydrobiologia, 595, 275–286.
http://dx.doi.org/10.1007/s10750-007-9023-3