Carrhotus assam Caleb, 2020

Caleb, John T. D., Bera, Chandan & Acharya, Shelley, 2020, New species and synonymies in the genus Carrhotus Thorell, 1891 from India (Aranei: Salticidae: Salticini), 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.

Figures

Map 1. Collecting localities of five Indian Carrhotus species. White star represents the type locality of Bianor piratus (= Carrhotus sannio). Карта 1. Точкии находок пЯти индийских видов Carrhotus. БелаЯ ЗвеЗдочка отмечает типовой локалитет Bianor piratus (= Carrhotus sannio).

Figs 11–14. Somatic morphology of Carrhotus assam Caleb sp.n., holotype male: 11 — general appearance, dorsal view; 12 — ditto, ventral view; 13 — ditto, front view; 14 — chelicerae, ventral view. Scale bars: (1–3) 1 mm, (4) 0.5 mm. Рис. 11–14. СоматическаЯ морфологиЯ Carrhotus assam Caleb sp.n., голотип-самец: 11 — общий вид, сверху; 12 — тоЖе, сниЗу; 13 — тоЖе, спереди; 14 — хелицеры, сниЗу. Масштаб: (1–3) 1 мм, (4) 0,5 мм.

Figs 15–21. Left male palps of Carrhotus assam Caleb sp.n., holotype (15–17, 20, 21) and C. yunnanensis (Song, 1991) comb.n. (18, 19; from Cao et al. [2016], used under a Creative Commons Attribution 4.0 International License): 15, 17, 18, 20 — ventral view; 16, 19, 21 — retrolateral view. Scale bars: (17) 0.1 mm, (15–16, 20, 21) 0.2 mm, (18) 0.5 mm. Рис. 15–21. Левые пальпы самцов Carrhotus assam Caleb sp.n., голотип (15–17, 20, 21) и C. yunnanensis (Song, 1991) comb.n. (18, 19; иЗ Cao et al. [2016], испольЗуетсЯ в соответствии с меЖдународной лиценЗией Creative Commons Attribution 4.0): 15, 17, 18, 20 — сниЗу; 16, 19, 21 — сбоку-сЗади. Масштаб: (17) 0,1 мм, (15–16, 20, 21) 0,2 мм, (18) 0,5 мм.