Teretamon, Yeo & Ng, 2007

Mitra, Santanu, Payra, Arajush & Chandra, Kailash, 2018, A new species of freshwater crab of the genus Teretamon Yeo & Ng, 2007 (Decapoda: Brachyura: Potamidae) from Arunachal Pradesh, northeastern India, Zootaxa 4500 (4), pp. 587-595 : 595

Key to the species of Teretamon

1. Carapace almost subquadrate, no trace of epibranchial tooth, chelipeds and ambulatory legs glabrous ( Fig. 2A ; Alcock 1910: fig. 11, pl. 3)......................................................................................... 2

- Carapace much wider than long, small epibranchial tooth present, chelipeds and ambulatory legs setose............................................................................................. T. spelaeum (Meghalaya, India)

2. Inner middle part of G1 acutely triangular, tip narrowly pointed ( Yeo & Ng, 2007: fig.13A)........ T. adiatretum ( Myanmar)

- Inner middle part of G1 not acutely triangular, tip pointed to blunt............................................... 3

3. G1 terminal segment relatively slender, inner lateral part semi-circularly convex, tip narrowly pointed ( Mitra, 2017: fig.116– 118).......................................................................... T. indicum (Mizoram, India)

- G1 terminal segment twisted, inner lateral part bluntly triangular, tip triangular ( Fig. 4A–D )............................................................................................... T. kempi n.sp. (Arunachal Pradesh, India

Figures

FIGURE 2. Teretamon kempi n. sp., holotype male (ZSI-C7128/2), A. dorsal habitus; B. frontal view of cephalothorax; C. male thoracic sternum and pleon.

FIGURE 4. Teretamon kempi n. sp., holotype male (ZSI-C7128/2): A, ventral view of right G1; B, ventral view of terminal part of right G1; C, dorsal view of right G1; D, dorsal view of terminal part of right G1; E, dorsal view of right G2