Acanthopotamon, Kemp, 1918

Mohapatra, Sameer Kumar Pati Swarup Ranjan Mohanty Anil, 2023, First record of a potamid crab (Decapoda: Brachyura) from Odisha State, India, Nauplius (e 2023020) 31, pp. 1-7 : 1-2

Acanthopotamon , freshwater crab, new record, Potamidae , Potaminae .

Odisha is the largest state among the states of eastern India. The diversity of freshwater crabs in Odisha, however, is relatively lower (four species) compared to other eastern Indian states viz., Bihar (six species) and West Bengal (16 species) ( Pati and Thackeray, 2018). The four species of freshwater crabs known from Odisha to date all belong to the family Gecarcinucidae Rathbun, 1904 : Barytelphusa cunicularis (Westwood in Sykes, 1836) (see Chopra and Tiwari, 1947; Ramakrishna, 1951); Oziotelphusa ganjamensis Pati and Sharma, 2012 (see Pati and Sharma, 2012); Sartoriana spinigera ( Wood-Mason, 1871) (see Henderson, 1893; Rathbun, 1905; Alcock, 1910); and Spiralothelphusa hydrodroma ( Herbst, 1794) (see Chopra and Tiwari, 1947; Deb, 1998a). No species of the family Potamidae Ortmann, 1896 , is so far known from Odisha. A potamid crab, Acanthopotamon martensi ( Wood-Mason, 1875) of the subfamily Potaminae Ortmann, 1896 , is reported herein for the first time from Odisha.

The material examined is deposited in the Zoological Survey of India,Western Regional Centre, Pune, India ( ZSI-WRC), while the comparative material was from the Crustacea Section of the Zoological Survey of India, Kolkata, India ( ZSIK). The specimens were identified using the key of Pati et al. (2019). The terminologies and measurement methods of the carapace are after Ng (1988). The following abbreviations are used: CW, width of carapace; CL, length of carapace; coll., collector; G1, male first gonopod; G2, male second gonopod.