Sartoriana trilobata is a species of freshwater crab which occurs exclusively in some areas of Northeast India. Being a riverine crab, it is occasionally found in beels or other riverine wetland habitats formed by monsoon floods in the Brahmaputra basin.The earlier descriptions of this species were mostly incomplete which lacked information on the morphology of the male gonopods.Therefore including the male gonopods, all the morphological features of Sartoriana trilobata are redescribed and illustrated. This species differs considerably from its only congener i.e., Sartoriana spinigera through suits of carapace, chelipeds, gonopods dissimilarities.

Liotelphusa laevis is a small, bright red coloured endemic freshwater crab but was ambiguously described from Northeastern India. Now the species has been categorized as 'near threatened' due to lack of necessary attention from conservationists, despite its potential for ornamental market. The present review has explored its identity clues which are discrete from other congeners so that an endeavor towards its conservation could easily be undertaken.

Crabs are significant invertebrates in the Subansiri River basin, one of the major sub-basins of the Brahmaputra valley in northeast India. They have immense ecological and economic value and provide an alternative source of income for the local inhabitants. Following thirteen sites in the Subansiri River basin were surveyed to determine the availability and diversity of crab species in this region: Hatinala, Kalma river, Dikrong river, Senki river, Poma river, Harmuti, Ranganadi river dam site, Diju stream, Lower Subansiri river, Downstream Ranganadi, Pani gaon wetlands, Bosa gaon beel, and Bhelamora beel. Crab samples were collected using a random sampling method and identified using standard taxonomic keys. Seven species from two families were identified and distinguished by their morphology and habitat preferences: Sartoriana spinigera, Sartoriana trilobata, Maydelliathelphusa lugubris, Maydelliathelphusa harpax, Liotelphusa laevis (Gecarcinucidae) Lobothelphusa woodmasoni, and Acanthopotamon horai (Potamidae). These crabs are thought to be endemic to the Eastern Himalayan region due to their limited dispersibility. This is the first study aimed at contributing to the documentation and conservation of freshwater crabs in North East India. Additionally, the economic relevance of freshwater crabs is highlighted.