Habrocestum emanasakgrensis Kadam & Tripathi 2023

Kadam, Gautam, Tripathi, Rishikesh & Sudhikumar, Ambalaparambil Vasu, 2023, Three new jumping spiders from northeastern India (Araneae: Salticidae: Hasariini: Habrocestum), Peckhamia 295 (1), pp. 1-10 : 2-3

Habrocestum emanasakgrensis Kadam & Tripathi 2023 , sp. nov.

Figures 1 , 4F , 5 (Ƌ only)

Etymology. The species group name is an adjective and refers to the type locality of this new species.

Type material. Holotype: Ƌ (NRC-AA-7687) from INDIA: Meghalaya: South Garo Hills: Eman-Asakgre (25°20'17''N, 90°30'41''E; 215 m alt.), 12 April 2022, Gautam K. leg., from ground, by hand. Deposited in the National Centre for Biological Sciences Research Collections ( NRC), Bengaluru, India.

Diagnosis. Males of H. emanasakgrensis are closely related to the males of H. africanum Wesolowska & Haddad 2009 , with cymbium and tegulum of similar shape, and with a triangular fleshy bulbus and a short embolus, but can be separated from that species by the thick RTA with a prolateral curvature (vs. comparatively thin and straight in H. africanum ), straight embolus (vs. curved in a prolateral direction in H. africanum ) and wide proximal tegular lobe (vs. narrow in H. africanum ) (compare Figure 1D–E with Wesołowska & Haddad 2009, figs. 62–65).

Description. Male (holotype, Figure 1A–C, F , colouration in alcohol): carapace, clypeus and chelicerae burnt orange; labium, endites, sternum, legs dark brown; eye field black; opisthosoma creamy-brown, with numerous brown transverse stripes. Fovea narrow, longitudinal, straight, reddish-brown. Cheliceral promargin with two closely spaced tiny teeth; retromargin with a single long tooth ( Figure 1F ). Opisthosoma oval, laterally with longitudinal imprinted lines which are denser posteriorly. Body length. 3.24. Carapace 1.66 long, 1.44 wide. Abdomen 1.58 long, 1.09 wide. Ocular area 1.01 long, 1.25 wide. Eye sizes and interdistances: AME 0.36, ALE 0.21, PME 0.07, PLE 0.17; AME–AME 0.02, AME–ALE 0.01, PME–PME 1.12, ALE–ALE 0.82, PME– PLE 0.16, PLE–PLE 0.97, ALE–PME 0.22, ALE-PLE 0.45. Length of Cchelicerae 0.55. Clypeus height at AMEs 0.08. Sternum 0.68 long, 0.49 wide. Length of pedipalp and legs: pedipalp 1.40 [0.46, 0.20, 0.19, 0.55], I 3.11 [1.13, 0.37, 0.62, 0.62, 0.37], II 2.41 [0.77, 0.39, 0.49, 0.44, 0.32], III 2.87 [0.93, 0.37, 0.58, 0.64, 0.35], IV 2.91 [0.90, 0.49, 0.62, 0.50, 0.40]. Leg formula: 1432. Spination of pedipalp: femur pld 2 do 2, patella pl 1 do 2, tibia pld 1 do 1, tarsus/cymbium pl 1 do 2 rl 1; legs: femur I do 2, II–IV pld 2 do 3; patellae I 0, II–III pld 1, IV rl 1; tibiae I–II plv 3 rlv 3, III pl 1 pld 1 plv 2 rl 1 rld 1 rlv 2, IV pl 1 plv 1 rl 1 rlv 1; metatarsi I–II plv 2 rlv 2, III pl 1 pld 2 plv 2 rl 2 rld 2 rlv 2, IV pl 1 plv 2 rl 1 rlv 2; tarsi I–IV 0. Pedipalp ( Figure 4D–E ): RTA thick, robust, strongly curved, thumb-like ( Figure 1E ). Tegulum moderately swollen, with a slightly long lateral proximal lobe ( Figure 1D ). Embolus short, thick, with blunt tip directed at 12-o’ clock ventrally ( Figure 1D ).

Female. Unknown.

Distribution. Known only from the South Garo Hills district of Meghalaya ( Figures 4F , 5 ).

Figures

Figure 1. Habrocestum emanasakgrensis, holotype male (NRC-AA-7687). A, Habitus, dorsal. B, Same, lateral. C, Same, frontal. D-E, Ventral (D) and retrolateral (E) views of left pedipalp. F, Left chelicera, retrolateral view.

Figure 4. A-D, Living holotype male Habrocestum togansangmai. E, Collection site for H. togansangmai (Meghalaya: South West Khasi Hills). F, Collection site for H. emanasakgrensis and H. imilchang (Meghalaya: South Garo Hills District). Photo credit: G. Kadam.

Figure 5. Map showing the collecting localities of the three new Habrocestum species from Meghalaya, India. Blue circle, H. emanasakgrensis. White circle, H. imilchang. Red circle, H. togansangmai, holotype. Red diamond, H. togansangmai, photographic record.