Zhezhoulinyphia denticulata, Irfan, Muhammad, Zhou, Gu-chun & Peng, Xian-jin, 2019

Irfan, Muhammad, Zhou, Gu-chun & Peng, Xian-jin, 2019, Zhezhoulinyphia gen. nov. (Araneae, Linyphiidae) from Yunnan, China, ZooKeys 862, pp. 43-60 : 47-50

Zhezhoulinyphia denticulata sp. nov. Figs 4, 5, 6, 7, 8, 9, 10, 11, 12

Types.

Holotype male, China, Yunnan: Fugong County, Lishadi Township, Shibali, 27.10520°N, 98.77980°E, alt. 2530 m, 10 August 2005, Guo Tang ( Tang–05– 02). Paratypes: 2 males 2 females, same data as holotype ( Tang–05– 02); 2 females, Fugong County, Pihe Township, Yueliangtian Village, 26.56784°N, 98.90884°E, alt. 1520 m, 24 August 2005, Guo Tang ( Tang–05– 08); 6 males 1 female, Baoshan City, Nankang Yakou (National 320 Road), 24.43717°N, 98.46054°E, alt. 2186 m, 30 October 2003, Guo Tang (Tang031030); 1 female, Gongshan County, Qiqi Dongshaofang, 27.69521°N, 98.48514°E, alt. 3208 m, 29 September 2007, Xian-jin Peng (20071001); 1 female, Gongshan County, Qiqi Dongshaofang, 27.69521°N, 98.48514°E, alt. 3208 m, 29 September 2007, Xian-jin Peng (20070929); 1 female, Gongshan County, Cikai Township, Dabadi troops place north bank of Pula river, 27.78333°N, 98.51667°E, alt. 3030 m, 28 September 2002, Heng-mei Yan (Yan020928); 6 males 1 female, Nujiang Prefecture, Nujiang State Nature Reserve, No.12 bridge Camp area, 16.3 air km W of Gongshan, 27.71503°N, 98.50244°E, alt. 2775 m, 15-19 July 2000, Heng-mei Yan, D. H. Kavanaugh, Charles Griswold, Hong-bin Liang, Darrell Ubick and Da-zhi Dong (00-QD).

Etymology.

The species name comes from the Latin adjective “denticulus”, meaning “teeth” and referring to the distal suprategular apophysis (DSA) with teeth in male palp.

Diagnosis.

Zhezhoulinyphia denticulata sp. nov. can be distinguished from Z. caperata sp. nov. by having the anterior wall of epigyne longer than wide, with a big outgrowth (Figs 1 A–C, 2A, B), whereas wider than long, posterior margin without distinct outgrowth in Z. caperata sp. nov. (Figs 7 A–D, 9 A–D, 10 A–C). Parmula with seven to twelve transverse wrinkles in new species (Figs 1 A–C, 2A, B), whereas there are three in Z. caperata sp. nov. (Figs 7 A–D, 9 A–D, 10 A–C).

Description.

Male (holotype): Total length: 4.24. Carapace 1.80 long, 1.43 wide, yellow, cephalic lobe 0.91 long, fovea, cervical and radial grooves distinct (Fig. 8A, B); Clypeus 0.59 high (Fig. 8B). Sternum longer than wide, brown, with spine-like hairs; labium wider than long; maxillae long, distal end broader with hairs (Fig. 8C). Chelicerae with three promarginal and three retromarginal teeth. AER recurved, PER straight, slightly wider. Eye sizes and interdistances: AME, 0.07; ALE, 0.10; PME, 0.11; PLE, 0.09; AME-AME, 0.07; PME-PME, 0.08; AME-ALE, 0.14; PME-PLE, 0.15; AME-PME, 0.16; ALE-ALE, 0.55; PLE-PLE, 0.59; ALE-PLE, 0.02. Length of legs: I, 12.63 (3.38, 3.88, 3.77, 1.60); II, 11.04 (3.16, 3.33, 3.23, 1.32); III, 7.21 (2.16, 2.16, 2.05, 0.84); IV, 8.93 (2.59, 2.63, 2.69, 1.02). Leg formula I–II–IV–III. TmI 1.25 and TmIV 0.74. Tibial dorsal spine formula: 2 –2–2– 2. Abdomen 2.44 long, 1.19 wide, cylindrical, grey, mid dorsally with a grey pattern and densely covered with white patches extending laterally, ventral side dark grey (Fig. 8 A–C). Palp (Figs 4 A–D, 5 A–G, 6A, B); femur almost equal to collective length of patella and cymbium, distally expanded, dorsally with a row of fine spine like hairs (Fig. 5A, B); patella shorter than tibia, dorsally with a long spine (Fig. 5A, B, 6A, B); tibia conic, with three retrolateral and a dorsal trichobothria, dorsally with a long spine (Figs 4A, B, 5G, 6A, B); cymbium conical, flask shaped, with a cymbial retrolateral lobe protruding upward (Figs 4B, 5B, G, 6B); paracymbium sclerotized, simple, distal arm longer than wide, tip pendulum-shaped (Figs 4B, 5F); distal suprategular apophysis proximally broad with teeth, distal part strongly curved into inverse U-shaped, and almost touches distal margin of paracymbium. Embolic division: dorsal lobe of embolic plate long, sclerotized, overlapping cymbium (Figs 4A, 5 C–E, 6A); radix long, distal margin semicircular with teeth (Figs 4A, B, 5 C–E, 6A, B); radical apophysis sclerotized, with blunt end (Figs 4A, B, 5 C–E, 6A, B); embolic membrane and embolus arise from the dorsal margin of semicircular part (Figs 4A, B, 5 C–E, 6A, B); embolus sclerotized, long, curved and almost touches serrated margin of radix (Figs 4A, 5 C–E, 6A).

Female (one of paratype, Tang–05– 02): Total length: 4.46. Carapace 1.67 long, 1.46 wide, yellow, cephalic region slightly elevated with spine like hairs, fovea, cervical and radial grooves distinct (Figs 8A, 11A). Clypeus 0.59 high. Sternum longer than wide, light orange, with spine-like hairs; labium wider than long; maxillae long, distal end broader with hairs (Figs 8B, 11B). Chelicerae with three promarginal and three retromarginal teeth. AER recurved, PER straight, slightly wider. Eye sizes and interdistances: AME, 0.09; ALE, 0.15; PME, 0.12; PLE, 0.12; AME-AME, 0.05; PME-PME, 0.08; AME-ALE, 0.07; PME-PLE, 0.12; AME-PME, 0.11; ALE-ALE, 0.59; PLE-PLE, 0.63; ALE-PLE contiguous. Length of legs: I, 9.67 (2.68, 3.09, 2.65, 1.25); II, 8.75 (2.59, 2.76, 2.35, 1.05); III, 6.31 (1.94, 2.01, 1.57, 0.79); IV, 7.37 (2.23, 2.24, 2.04, 0.86). Leg formula I–II–IV–III. Tm I, 0.92 and Tm IV, 0.53. Tibial dorsal spine formula: 2 –2–2– 2. Abdomen 2.79 long, 1.64 wide, oval, grey, mid dorsally with a grey pattern and densely covered with white patches extending laterally, ventral side brown (Figs 8A, B, 11A, B). Epigyne (Figs 7 A–D, 9 A–D, 10A, B): Anterior wall of epigyne (AE), longer than wide, posterior margin with a big outgrowth; copulatory openings present inside the atrium; parmula long, extending towards anterior margin first then folding backward, distal part with seven to twelve transverse wrinkles (Figs 7 A–D, 9 A–D, 10 A, B), distal tip with a socket posteriorly. Vulva: posterior median plate broad, cordiform; copulatory ducts long, arch-shaped; spermathecae U-shaped or L-shaped, present mesally on the posterior median plate; fertilization ducts long and extending mesally (Fig. 7D).

Distribution.

China (Yunnan) (Fig. 12).