Teretamon Yeo and Ng, 2007

Mitra, Santanu & Pati, Sameer Kumar, 2021, A new species of freshwater crab, Teretamon kapota sp. nov. (Decapoda: Brachyura: Potamidae) and a new record from Arunachal Pradesh, North-Eastern India, Records of the Zoological Survey of India 121 (1), pp. 1-9 : 8

Key to the species of Teretamon Yeo and Ng, 2007

1. Eyestalk subconical or conical; G1 terminal segment with relatively low dorsal flap …................................... 2

– Eyestalk cylindrical; G1 terminal segment with relatively high dorsal flap ….......................................... 3

2. Cornea relatively large; carpal subdistal spine on chelipeds relatively broad; male telson relatively broad, proximal width ca. 1.5 times medial length; G1 terminal segment distinctly narrow distally, with acute tip …........................ T. indicum ( INDIA: Mizoram)

– Cornea relatively small; carpal subdistal spine on chelipeds relatively narrow; male telson relatively narrow, proximal width ca. 1.1 times medial length; G1 terminal segment gradually narrow distally, with blunt tip …................... T. spelaeum ( INDIA: Meghalaya)

3. Eye relatively small as compared to orbital space; male telson with gently concave lateral margins G1 terminal segment with strongly convex, semicircular dorsal flap ...….................................................. T. kapota sp. nov. ( INDIA: Arunachal Pradesh)

– Eye relatively large as compared to orbital space; male telson with straight lateral margins; G1 terminal segment with triangular to broadly triangular dorsal flap …............................................................................... 4

4. Male pleonal somite 6 trapezoidal, with strongly converging lateral margins; G1 terminal segment with triangular dorsal flap, tip straight ........................ T. adiatretum ( INDIA: Dafla Hills bordering western Arunachal Pradesh and Assam; MYANMAR)

– Male pleonal somite 6 almost rectangular, with gently converging lateral margins; G1 terminal segment with broadly triangular dorsal flap, tip gently upcurved …. ............................................................................ T. kempi ( INDIA: Arunachal Pradesh)