Carrhotus assam Caleb, 2020

Gordana, Grbić & Ambros, Hänggi, 2020, ADDITIONAL SPIDER RECORDS FROM MT. FRUŠKA GORA (SERBIA) WITH A FIRST INSIGHT INTO WINTER SPECIES, Arthropoda Selecta 29 (1), pp. 51-66 : 54-55

Carrhotus assam Caleb , sp.n.

Figs 11–17, 20, 21, Map 1.

TYPE. Holotype # ( NZC-ZSI 6938 /18) from India, Assam, Dehing Patkai Wildlife Sanctuary (27.24°N, 95.41°E), 137 m a.s.l., 16.08.2016, T. K. Roy.

ETYMOLOGY. The species is named after the Indian state Assam from where the holotype was collected. The name is as a noun in apposition .

DIAGNOSIS. The species is closely related to C. yunnanensis ( Song, 1991) comb.n., but can be distinguished from it by the following characters (cf. Figs 15, 16, 20, 21 with Figs 18, 19): the orientation of RTA which is directed vertically, at about 20 degrees, in both ventral and retrolateral views in C. assam sp.n., while it protrudes laterally, at about 45 degrees, in ventral view and directed ventrally in retrolateral view, in C. yunnanensis ; palpal tibia twice as long as its width (thrice in C. yunnanensis ); tibia is about 2/ 3rd of the cymbial length (4/5th in C. yunnanensis ).

DISTRIBUTION. India (Assam) ( Map 1).

DESCRIPTION. MALE. Total length: 4.95; carapace: 2.55 long, 2.19 wide; abdomen: 2.40 long, 1.83 wide. Carapace reddish brown, posterior eyes surrounded by black ( Fig. 11). Anterior eyes surrounded by pale white orbital setae; clypeus brown ( Fig. 13). Eye measurements: AME 0.64, ALE 0.34, PME 0.10, PLE 0.37, AER 2.09, PER 2.44, EFL 1.54. Clypeus height 0.18. Sternum yellowish brown. Chelicerae brown, with two small promarginal and a large retromarginal teeth. Labium and maxillae brownish ( Fig. 14). Legs brown with dark brown annulations ( Figs 11, 12). Leg measurements: I 7.66 (2.27, 1.50, 1.89, 1.28, 0.72); II 6.01 (1.85, 1.22, 1.27, 1.06, 0.61); III 6.55 (2.16, 1.13, 1.20, 1.29, 0.77); IV 6.44 (2.00, 1.02, 1.27, 1.43, 0.72). Leg formula: 1342. Leg spination: femora I–IV 0700; patellae I– IV 1010; tibiae I 4026, II 4036, III 4043, IV 4043; metatarsi I 0004, II 1014, III 3034, IV 4044; tarsi I–IV 0000. Abdomen brownish, with dark brown patches ( Fig. 11); venter brownish. Spinnerets yellow-brown ( Fig. 12). Palps brownish; cymbium with an apical protrusion; embolus emerging at nine o’clock position, thin and needle-like, with a membrane; palpal tibia long; RTA thick, broad at its base and gently curving, pointed at its tip ( Figs 15–17, 20, 21).

FEMALE unknown.