Corinnomma spiralis, Zhang & Jin & Zhang, 2022

Zhang, Lu, Jin, Chi & Zhang, Feng, 2022, Two new species of Corinnomma Karsch, 1880 from Yunnan, China (Araneae Corinnidae, Castianeirinae), Zootaxa 5222 (3), pp. 240-256 : 250-255

publication ID	https://doi.org/ 10.11646/zootaxa.5222.3.2
publication LSID	lsid:zoobank.org:pub:B0CAB82C-1485-40D2-AF17-7FC3FBB22308
DOI	https://doi.org/10.5281/zenodo.7461455
persistent identifier	https://treatment.plazi.org/id/039D8789-B91E-FF8A-98E2-18C89F7B80A8
treatment provided by	Plazi
scientific name	Corinnomma spiralis
status	sp. nov.

Treatment

Corinnomma spiralis sp. nov. ‹DzứừNjff›

Figs 7–8 View FIGURE 7 View FIGURE 8 , 9A–B View FIGURE 9 , 10E–F View FIGURE 10

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. GoogleMaps

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. GoogleMaps

Etymology. The specific name is an adjective and referring to the shape of the embolus ( Figs 8A–C View FIGURE 8 ; 10E–F View FIGURE 10 ). 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 View FIGURE 10 with Fig. 10A–B View FIGURE 10 ); 2) the subulate retrobasal paracymbial spine (vs. digitiform in C. severum ) (compare Fig. 9A–B View FIGURE 9 with Fig. 9E–F View FIGURE 9 ). 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 View FIGURE 8 with Fig. 4D–E View FIGURE 4 ).

Description. Male (holotype, YNM111, Fig. 7A–B View FIGURE 7 ). 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 View FIGURE 8 , 10E–F View FIGURE 10 ): Cymbium with distinct subulate retrobasal paracymbial spine, with ridges ( Fig. 9A–B View FIGURE 9 ). Embolus S-shaped, helically twisted, with two bends in ventral view ( Figs 8A–C View FIGURE 8 , 10E–F View FIGURE 10 ).

Female (YNM106, Fig. 7C–D View FIGURE 7 ). 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 View FIGURE 8 . Copulatory openings lying close to posterior margin of epigastric plate, with indistinct C-shaped edges ( Fig. 8D View FIGURE 8 ). Copulatory ducts long, S-shaped ( Fig. 8E View FIGURE 8 ), attached to thin lateral lobe of primary spermathecae. Primary spermathecae inverted U-shaped, with thin prolateral and thick retrolateral lobes, contiguous ( Fig. 8E View FIGURE 8 ). Secondary spermathecae sac-like, with straight, wrinkled and contiguous proximal and diverging globular distal parts ( Fig. 8E View FIGURE 8 ). 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 View FIGURE 8 ).