Teretamon kapota, Mitra & Pati, 2021

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 : 2

Teretamon kapota sp. nov. ( Figures 1-6 )

LSID: urn:lsid:zoobank.org:act:5D200789-BFB2-4CB3-944A-AFA6D6B34DD3

Material examined: Holotype: adult male (CW 26.50 mm, CL 18.40 mm, CH 12.20 mm, FW 8.30 mm): India, Arunachal Pradesh, East Siang district, small hill stream connected to Sibyia River, near Siluk village , ca. 30 km north east of Pasighat (28.175°N, 95.470°E), altitude 336 mASL, 4-xi-2019, coll. S. Mitra ( ZSIK C.8541/2).

Paratype: Subadult male (CW 15.88 mm, CL 11.83 mm, CH 7.90 mm, FW 5.31 mm): India, Arunachal Pradesh, Lower Dibang Valley district, Mehao Wildlife Sanctuary , drainage between Injino River and Koronu (28.058°N,

95.935°E), altitude 290 mASL, 29-viii-2016, coll. S.D. Gurumayum and Party (ZSI-WRC C.1981).

Additional material: INDIA, Arunachal Pradesh, Lower Dibang Valley district, Mehao Wildlife Sanctuary: juvenile male (CW 12.35 mm, CL 9.15 mm, CH5.23 mm, FW 4.48 mm), stream ca. 8 km north west of Roing on Roing-Anini road (28.206°N, 95.816°E), altitude 808 mASL, 16-iii-2014, coll. B. Sinha and Party (ZSI-WRC C.1905); adult female (CW 23.12 mm, CL 16.83 mm, CH 10.79 mm, FW 7.08 mm), Tiwarigaon, Roing (28.224°N, 95.833°E), altitude 1424 mASL, 08-v-2015, coll. L. Tamang (ZSI-WRC C.1906); juvenile female (CW 13.88 mm, CL 10.16 mm, CH6.75 mm, FW 4.59 mm), small drain at 16 km from Roing on Anini road (28.206°N, 95.811°E), altitude 871 mASL, 09-iv-2016, coll. S.D. Gurumayum and Party (ZSI-WRC C.1907); juvenile male (CW 12.90mm, CL 10.01 mm, CH 6.17 mm, FW 4.53 mm) and subadult female (CW 14.77 mm, CL 10.58 mm, CH6.22 mm, FW 4.88 mm), same collection data as paratype (ZSI-WRC C.1908) .

Comparative material: Teretamon adiatretum ( Alcock, 1910) : ♂, Myanmar, Kakhyen hills, coll. H.H. GodwinAusten ( ZSIK C.4071/4) .

Figures

Figure 1. Teretamon kapota sp. nov., holotype male (26.50 × 18.42 mm) (ZSIK C.8541/2): colouration of freshly preserved specimen.

Figure 2. Teretamon kapota sp. nov., holotype male (26.50 × 18.42 mm) (ZSIK C.8541/2): A. Overall dorsal view; B. Frontal view of cephalothorax;C. Overall ventral view.

Figure 3. Teretamon kapota sp. nov., holotype male (26.50 × 18.42 mm) (ZSIK C.8541/2): A. Outer view of right or major chela; B. Right G1 terminal segment in situ; C. Pleon and telson; D. Dorsal view of left G1; E. Ventral view of left G1; F. Left G2.

Figure 4. Teretamon kapota sp. nov., holotype male (26.50 × 18.42 mm) (ZSIK C.8541/2): A. Dorsal view of left G1; B. Ventral view of left G1; C. Left G2.

Figure 5. Teretamon kapota sp. nov., paratype male (15.88 × 11.83 mm) (ZSI-WRC C.1981): A. Overall dorsal view; B. Frontal view of cephalothorax; C. Overall ventral view; D. Dorsal view of left G1; E. Left G2. Scale bars = 10 mm (A–C), 1 mm (D, E).

Figure 6. Teretamon kapota sp. nov., female (23.13 × 16.83 mm) (ZSI-WRC C.1906): A. Pleonal somites 4–6 and telson; B. Thoracic sternites showing vulvae. Scale bar = 2 mm.