Corinnomma spiralis Zhang & Jin & Zhang 2022, sp. nov.
Creators: name: Zhang, Lu
name: Jin, Chi
name: Zhang, Feng
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Corinnidae
Corinnomma
Corinnomma spiralis

description: Corinnomma spiralis sp. nov. ‹DzứừNjff›
Figs 7–8, 9A–B, 10E–F
Type material. Holotype ♁ (MHBU, YNM111) from CHINA: Yunnan Province, Mengla County, Menglun Town, Xishuangbanna Tropical Botanical Garden of Chinese Academy of Sciences, Green Stone Forest (21°54′39.23″N, 101°17′00.32″E, 669 m a.s.l.), 2 August 2021, leg. Lu Zhang.
Paratype: 1♀ (MHBU, YNM106) from CHINA: Yunnan Province, Yangbi County, Shunbi Town (25°28′48.2″N, 99°55′28.33″E, 1498m), 7 July 2021, leg. Lu Zhang.
Etymology. The specific name is an adjective and referring to the shape of the embolus (Figs 8A–C; 10E–F). Latin spiralis = spiral.
Diagnosis. The new species resembles C. severum in having a similar body color and features, but the males can be distinguished by: 1) the longer and slender embolus (vs. short and thick in C. severum) (compare Fig. 10E–F with Fig. 10A–B); 2) the subulate retrobasal paracymbial spine (vs. digitiform in C. severum) (compare Fig. 9A–B with Fig. 9E–F). The females can be recognized by the longer, S-shaped copulatory ducts (vs. short, C-shaped copulatory ducts in C. severum), and the inverted U-shaped primary spermathecae (vs. inverted J-shaped in C. severum) (compare Fig. 8D–E with Fig. 4D–E).
Description. Male (holotype, YNM111, Fig. 7A–B). Total length 5.60; carapace 2.81 long, 1.75 wide; abdomen 2.79 long, 1.43 wide. Eye sizes and interdistances: AME 0.13, ALE 0.09, PME 0.10, PLE 0.08; AME–AME 0.27, AME–ALE 0.19, ALE–ALE 0.60, PME–PME 0.31, PME–PLE 0.20, PLE–PLE 0.74, ALE–PLE 0.16; MOA 0.28 long; anterior width 0.34, posterior width 0.40. Clypeal height 0.16. Chelicerae with three pro- (middle largest, distal smallest) and two retromarginal teeth (same size). Measurements of legs: I 10.23 (2.87, 0.86, 2.68, 2.37, 1.45), II 9.77 (2.70, 0.81, 2.59, 2.25, 1.42), III 9.18 (2.20, 0.75, 2.13, 2.27, 1.83), IV 12.23 (3.29, 1.01, 2.96, 3.50, 1.47). Spination: femur I–IV do 3; femur I pl 2, II pl 3, III–IV pl 3 rl 3, tibia I do 1 plv 2 rlv 2, II plv 2 rlv 2, III–IV do 1 pl 2 rl 2 plv 3 rlv 3, metatarsus I–II plv 2 rlv 2, III–IV do 1 pl 3 rl 3 plv 3 rlv 3 vt 1. Carapace dark brown, oval, with smooth edge. Sternum dark brown. Abdomen dark brown, with three transverse bands covered by plumose hairs.
Palp (Figs 8A–C, 10E–F): Cymbium with distinct subulate retrobasal paracymbial spine, with ridges (Fig. 9A–B). Embolus S-shaped, helically twisted, with two bends in ventral view (Figs 8A–C, 10E–F).
Female (YNM106, Fig. 7C–D). Like the male, except by the following: total length 7.13; carapace 3.51 long, 2.07 wide; abdomen 3.62 long, 2.22 wide. Eye sizes and interdistances:AME 0.15, ALE 0.14, PME 0.13, PLE 0.10; AME–AME 0.30, AME–ALE 0.20, ALE–ALE 0.68, PME–PME 0.38, PME–PLE 0.25, PLE–PLE 0.86, ALE–PLE 0.16; MOA 0.23 long; anterior width 0.43, posterior width 0.51. Clypeal height 0.26. Measurements of legs: I lost, II 8.32 (2.35, 0.65, 2.26, 1.86, 1.20), III 7.70 (2.24, 0.72, 1.81, 1.85, 1.08), IV 10.82 (2.78, 0.82, 2.74, 3.16, 1.32). Spination: leg I lost; femur II–IV do 3; femur II–IV pl 3 rl 2 (left); tibia II plv 2 rlv 2, III do 1 pl 2 rl 2 plv 2 rlv 2, IV do 1 pl 2 rl 2 plv 3 rlv 3; metatarsus II plv 2 rlv 2, III–IV pl 3 rl 3 plv 3 rlv 3 vt 1. Carapace black. Sternum black. Abdomen black, with four transverse white bands covered by plumose hairs.
Epigyne as in Fig. 8D–E. Copulatory openings lying close to posterior margin of epigastric plate, with indistinct C-shaped edges (Fig. 8D). Copulatory ducts long, S-shaped (Fig. 8E), attached to thin lateral lobe of primary spermathecae. Primary spermathecae inverted U-shaped, with thin prolateral and thick retrolateral lobes, contiguous (Fig. 8E). Secondary spermathecae sac-like, with straight, wrinkled and contiguous proximal and diverging globular distal parts (Fig. 8E). Fertilization duct semi-circular, lying on secondary spermathecae and connecting with lightly sclerotized and Y-shaped sclerite on distal part of epigastric plate (Fig. 8E).
Distribution. China (Yunnan).
description: Published as part of Zhang, Lu, Jin, Chi & Zhang, Feng, 2022, Two new species of Corinnomma Karsch, 1880 from Yunnan, China (Araneae Corinnidae, Castianeirinae), pp. 240-256 in Zootaxa 5222 (3) on pages 250-255, DOI: 10.11646/zootaxa.5222.3.2, http://zenodo.org/record/7461429