Abormon, a new genus of freshwater crab (Crustacea: Brachyura: Potamidae) from northeastern India, with descriptions of two new species

Abstract

A new genus and two new species of potamiscine freshwater crabs (Potamidae) are described from the Abor Hills in the Upper Siang District of Arunachal Pradesh State, northeastern India. Abormon gen. nov. is morphologically most similar to Pararanguna Dai and Chen, 1985, from Yunnan Province in China but can be differentiated by the setose dorsal surface and the medially concave posterolateral margins of the carapace, the concave lateral margins of the male telson, the relatively low dorsal flap on the terminal segment of the male first gonopod, and the anteriorly open and transversely ovate vulvae. Abormon capillosum sp. nov. can be distinguished from A. praecalvum sp. nov. by characters of the carapace, pereiopods, male pleonal somite 6, male gonopods, and vulvae.

Diversity of freshwater crabs (Crustacea: Decapoda: Brachyura) in the Subansiri River basin of Arunachal Pradesh and Assam, northeast India

“…In northeast India, freshwater crabs are the most extensively consumed aquatic species by the various tribal communities, second only to fish, due to their distinct taste, medicinal properties, and aboriginal faith in crab meat. Despite the fact that 44 species of freshwater crabs have been reported in northeast India (Ghosh et al, 2006;Takeda et al, 2012;Mitra, 2017Mitra, , 2020; Pati and Thackeray, 2018; Pati et al, 2019;Mitra et al, 2021;Pati, 2021), there is currently no systematic and evidence-based record of freshwater crab diversity in this region. As a result, the current survey was carried out to contribute to the documentation of freshwater crabs in Arunachal Pradesh and Assam, India's far northeast.…”