Habrocestum imilchang Kadam &amp; Tripathi 2023, sp. nov.
Creators: name: Kadam, Gautam
name: Tripathi, Rishikesh
name: Sudhikumar, Ambalaparambil Vasu
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Salticidae
Habrocestum
Habrocestum imilchang

description: <i>Habrocestum imilchang</i> Kadam &amp; Tripathi 2023, sp. nov. Figure 2, 4F, 5 (Ƌ only) <i>Etymology</i>. The species group name is a noun and refers to the name of a waterfall from near the collection site of the type. <i>Type material</i>. Holotype: Ƌ (NRC-AA-7688) from INDIA: Meghalaya: South Garo Hills: Eman-Asakgre (25° 19.517'N, 90° 30.985'E; 120 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. <i>Diagnosis</i>. Males of <i>Habrocestum imilchang</i> are most similar to the males of <i>H. albopunctatum</i> Wesolowska &amp; van Harten 2002, as both share a thin, long and slightly bent embolus, but can be distinguished from the latter species by the smooth and rounded anterior lobe of the tegulum (vs. cone shaped in <i>H. albopuctatum</i>), and a cheliceral retromargin with a serrated tooth (vs. bifurcated tooth in <i>H. albopunctatum</i>) (compare Figure 2E–F with Weso&amp;lstrok;owska &amp; van Harten 2002, figs. 5–10). <i>Description</i>. <i>Male</i> (holotype, Figure 2A–C, G, colouration in alcohol): carapace, clypeus and chelicerae brown; labium, endites, sternum, legs dark brown; eye field black; opisthosoma pale, with numerous brown transverse stripes. Carapace with scattered fine black hairs. Fovea narrow, longitudinal, straight, black. Cheliceral promargin with two tiny teeth, a bit spaced; retromargin with a serrated tooth (Figure 2G). Opisthosoma oval, hirsute. Body length. 4.13. Carapace 2.28 long, 1.75 wide. Abdomen 1.86 long, 1.27 wide. Ocular area 1.01 long, 1.58 wide. Eye sizes and interdistances: AME 0.50, ALE 0.30, PME 0.09, PLE 0.27; AME–AME 0.02, AME–ALE 0.01, PME–PME 1.46, ALE–ALE 1.07, PME–PLE 0.23, PLE–PLE 1.24, ALE–PME 0.34, ALE-PLE 0.64. Length of chelicerae 0.71. Clypeus height at AMEs 0.06. Sternum 0.80 long, 0.55 wide. Length of pedipalp and legs: pedipalp 1.87 [0.86, 0.15, 0.22, 0.64], I 4.05 [1.29, 0.62, 0.98, 0.73, 0.43], II 3.27 [1.12, 0.45, 0.73, 0.59, 0.38], III 3.65 [1.16, 0.55, 0.78, 0.76, 0.40], IV 3.93 [1.26, 0.44, 0.80, 0.96, 0.47]. Leg formula: 1432. Spination of pedipalp: femur pld 2 do 2, patella pl 2 do 1, tibia pld 1 do 2 rl 1, tarsus/cymbium pl 2 do 2 rl 1 rld 1; legs: femur I pld 1 do 3, II–IV pld 1 do 3 rld 1; patellae I–II 0, III–IV pld 1 rld 1; tibia I plv 3 rlv 3, II plv 2 rlv 2, III pl 2 pld 1 plv 2 rl 1 rld 1 rlv 1, IV pl 2 pld 1 plv 2 rld 1 rlv 1; metatarsus I–II plv 2 rlv 2, II pl 1 plv 2 rlv 2, III pl 2 pld 2 plv 2 rl 2 rld 2 rlv 2, IV pl 2 pld 1 plv 1 rl 2 rld 1 rlv 2; tarsi I–IV 0. Pedipalp (Figure 2D–F): Palpal femur proximally with a small femoral apophysis (Figure 2D). RTA short, narrow, tube-like, slightly bent at middle, tip directed toward a 10 o’clock position retrolateral view (Figure 2F). Tegulum with a slightly long proximal lobe, protruding posterolaterally (Figure 2E). Embolus broad at base, long, with narrow apex, arising from under tegular ledge, directed at 12-o’ clock ventrally (Figure 2E). <i>Female</i>. Unknown. <i>Distribution</i>. Known only from the South Garo Hills District of Meghalaya (Figure 4F, 5).
description: Published as part of <i>Kadam, Gautam, Tripathi, Rishikesh &amp; Sudhikumar, Ambalaparambil Vasu, 2023, Three new jumping spiders from northeastern India (Araneae: Salticidae: Hasariini: Habrocestum), pp. 1-10 in Peckhamia 295 (1)</i> on page 4