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Type: Article
Published: 2016-11-27
Page range: 143–152
Abstract views: 65
PDF downloaded: 4

A new species of long-legged terrestrial Terrapotamon Ng, 1986 (Crustacea: Brachyura: Potamidae) from limestone formations in Satun, southern Thailand

Department of Biology, Prince of Songkla University, PO Box 3 Ko Hong, Songkhla 90112, Thailand.
Lee Kong Chian Natural History Museum, Faculty of Science, National University of Singapore, 2 Conservatory Drive, Singapore 117377, Republic of Singapore.
Crustacea comparative morphology freshwater crab Indochina new species Southeast Asia systematics


A new species of terrestrial potamid crab, Terrapotamon longitarsus, is described from limestone hills in Satun Province in southern Thailand. It is easily distinguished from other Terrapotamon species by its conspicuously long ambulatory legs (all congeners have proportionately short legs), relatively smooth dorsal surface of carapace, transversely narrow male thoracic sternites 1–4, and a characteristically structured male first gonopod.



  1. Gima, H. & Shokita, S. (1980) Distribution of potamonid crabs in the Yona River of Okinawa Island, the Ryukyus. Biological Magazine of Okinawa, 18, 9–15. [In Japanese with English abstract]

    Leelawathanagoon, P., Lheknim, V. & Ng, P.K.L. (2010) On a new species of freshwater crab of the genus Terrapotamon (Brachyura, Potamidae) from Peninsular Thailand. Crustaceana, 83 (1), 49–59.

    Naruse, T., Karasawa, H., Shokita, S., Tanaka, T. & Moriguchi, M. (2004) A first fossil record of the terrestrial crab, Geothelphusa tenuimanus (Miyake & Minei, 1965) (Decapoda, Brachyura, Potamidae) from Okinawa island, central Ryukyus, Japan. Crustaceana, 76 (10), 1211–1218.

    Ng, P.K.L. (1986) Terrapotamon gen. nov., a new genus of freshwater crabs from Malaysia and Thailand, with description of a new species, Terrapotamonaipooae sp. nov. (Crustacea: Decapoda: Brachyura: Potamidae). Journal of natural History, 20, 445–451.

    Ng, P.K.L. (1988) The freshwater crabs of Peninsular Malaysia and Singapore. Department of Zoology, National University of Singapore, Shinglee Press, Singapore, viii+156 pp., figs. 1–63, 4 colour plates.

    Ng, P.K.L. (2004) Crustacea: Decapoda, Brachyura. In: Yule, C. & Yong, H.S. (Eds.), Freshwater Invertebrates of the Malaysian Region. Malaysian Academy of Sciences, pp. 311–336.

    Ng, P.K.L. & Guinot, D. (2001) On the land crabs of the genus Discoplax A. Milne Edwards, 1867 (Crustacea: Decapoda: Brachyura: Gecarcinidae), with description of a new cavernicolous species from the Philippines. Raffles Bulletin of Zoology, 49 (2), 311–338.

    Ng, P.K.L., Guinot, D. & Davie, P.J.F. (2008) Systema Brachyurorum: Part 1. An annotated checklist of extant brachyuran crabs of the world. Raffles Bulletin of Zoology, Supplement 17, 1–286.

    Ng, P.K.L. & Naiyanetr, P. (1998) Terrapotamon palian sp. nov., a second member of the terrestrial crab genus Terrapotamon (Decapoda, Brachyura, Potamidae) from southern Thailand. Crustaceana, 71, 487–492.

    Ng, P.K.L. & Shih, H.-T. (2015) The land crabs of the Discoplax longipes A. Milne-Edwards, 1867 species group, with description of a new species from Guam (Crustacea: Decapoda: Brachyura: Gecarcinidae). Zootaxa, 3980 (3), 379–405.

    Ng, P.K.L. & Tan, T.H.T. (1996) Die Regenbogenlandkrabbe aus dem Süden Thailands. Das Aquarium und Terrarium Zeitschrift, 49 (12), 784–787.

    Ng, P.K.L. & Tay, F.W.M. (2001) The freshwater crabs of Sri Lanka (Decapoda: Brachyura: Parathelphusidae). Zeylanica, 6, 113–199.

    Rathbun, M.J. (1898) Descriptions of three new species of freshwater crabs of the genus Potamon. Proceedings of the biological Society of Washington, 12, 27–30.

    Schubart, C.D., Liu, H.-C. & Ng, P.K.L. (2009) Revision of Selatium Serène & Soh, 1970 (Crustacea: Brachyura: Sesarmidae), with description of a new genus and two new species. Zootaxa, 2154, 1–29.

    Yeo, D.C.J. & Ng, P.K.L. (2004) 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.

    Yoshigou, H. (1999) Potamidae (Crustacea: Decapoda: Brachyura) of Japan. Journal of the Hiba Society of Natural History, 191, 17–26, pls. 1, 2. [In Japanese]