Scotinotylus longiprojectus Irfan, Zhang & Peng, sp. n.
Creators: name: Irfan, Muhammad
name: Zhou, Gu-Chun
name: Peng, Xian-Jin
name: Zhang, Zhi-Sheng
Publisher: name: Zenodo
Year: 2025
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Linyphiidae
Scotinotylus
Scotinotylus longiprojectus

description: Scotinotylus longiprojectus Irfan, Zhang & Peng, sp. n.
(ẗẋȁ头e)
Figures 212–215, 310, 314, 315
Types. Holotype ♂ (HNU–GZ– IV–1715), CHINA, Guizhou Prov.: Tongren City, Songtao Co., Wuluo Town, Taohuayuan Vill., Fanjingshan NNR, 28.00130°N, 108.80578°E, 1160 m, 06.XI.2017, G.C. Zhou leg. Paratypes: 32♂ 41♀, with same data as for holotype male (HNU–GZ– IV–1715); Hunan Prov.: 12♂ 18♀, Shaoyang City, Suining Co., Zhaishi Town, Tieshanlin Vill., Huangshan NNR, 26.37646°N, 110.10573°E, 1129 m, 26.X.2017, G.C. Zhou leg. (HNU–HN– IV– 1759); 5♂ 7♀, Shaoyang City, Chengbu Co., Dajiang Town, Taiping Vill., 26.34007°N, 110.24947°E, 553 m, 09.XI.2017, G.C. Zhou leg. (HNU–HN– IV–1776); 1♀, Shaoyang City, Chengbu Co., Rulin Town, Daqiao Vill., 26.34077°N, 110.27790°E, 527 m, 08.XI.2017, G.C. Zhou leg. (HNU–HN– IV–1773); 1♀, Ningxiang Co., Huaminglou Town, Yanglin Vill., 28.087272°N, 112.67114°E, 125 m, 09. V.2017, G.C., Zhou et al. leg. (HNU–HN– IV–1707); 2♂ 3♀, Liuyang City, Mudu Vill., Daweishan NFP, 28.43388°N, 114.03376°E, 379 m, 14.I.2018, G.C. Zhou et al. leg. (HNU–HNDWS–18–05); Hubei Prov.: 6♀, Enshi Co., Xuaneng Co., Changtanghe Town, Dawolong Vill., 30.06976°N, 109.74897°E, 839 m, 16.V.2017, G.C. Zhou et al. leg. (HNU–HB– IV–1707); 4♀, Enshi Co., Xuaneng, Changtanghe Town, Lianghekou Vill., 30.00166°N, 109.74093°E, 1234 m, 14.V.2017, G.C. Zhou et al. (HNU–HB– IV–1703); 2♀, Enshi Co., Huangjindong Town, Maliuxi Vill., 29.95008°N, 109.02562°E, 863 m, 20.V.2017, G.C. Zhou et al. leg. (HNU–HB– IV–1722).
Etymology. The specific epithet is derived from the Latin adjectives “longus” and “projectus” meaning “long” and “projecting” and referring to the paracymbium with long projection in male palp.
Diagnosis. Scotinotylus longiprojectus sp. n. resembles S. guizhouensis sp. n. in having the similar tegulum and the embolic division (Figs 212A–D, 213A–E; Figs 208A–D, 209A–C), but can be distinguished by the basal part of the paracymbium with long projection, hook-shaped pointed end and almost reaches to the proximal end of the tibia in retrolateral view in S. longiprojectus sp. n. (Figs 212A–C, 213E), projection absent in S. guizhouensis sp. n. (Figs 208B, C); distal suprategular apophysis small, retained below the embolic membrane in S. longiprojectus sp. n. (Figs 212A–C, 213A–D), vs. long, tongue-shaped, protruding above the embolic membrane in S. guizhouensis sp. n. (Figs 208B, C, 209A– C); retrolateral tibial apophysis absent in S. longiprojectus sp. n. (Fig. 212B), vs. present in S. guizhouensis sp. n. (Fig. 208B). Female resembles those of S. pallidus, S. protervus and S. sacratus in having the epigyne with a common small cusp-shaped scapoid on anterior margin (Figs 214A–C; Millidge, 1981, figs 36, 41, 72), but can be distinguished by the spermathecae present at posterior end on dorsal plate in S. longiprojectus sp. n. (Fig. 214C; vs. present anteriorly).
Description. Male (holotype, Figs 215A–C): Total length: 1.99. Carapace 0.89 long, 0.65 wide, dark brown, cephalic region strongly elevated, cephalic pits present behind PLEs, fovea, cervical and radial grooves distinct. Clypeus 0.29 high. Chelicerae with five promarginal and six retromarginal teeth. Sternum longer than wide, brown with microsetae. Eyes: AER recurved, PME procurved. Eye sizes and interdistances: AME 0.04, ALE 0.07, PME 0.06, PLE 0.06, AME–AME 0.02, PME–PME 0.07, AME–ALE, 0.04, PME–PLE 0.05, AME–PME 0.10, ALE–ALE 0.28, PLE–PLE 0.30, ALE–PLE contiguous. Length of legs: I 2.17 (0.66, 0.72, 0.42, 0.37), II 2.12 (0.65, 0.73, 0.38, 0.36), III 1.76 (0.53, 0.57, 0.36, 0.30), IV 2.16 (0.58, 0.79, 0.46, 0.33). Tibial spine formula: 2-2-1-1. TmI 0.32 and TmIV absent. Opisthosoma 1.18 long, 0.84 wide, oval, grey, densely covered with fine spines.
Palp (Figs 212A–D, 213A–E): Femur unmodified, almost longer than patella and tibia. Patella as long as tibia, ventrally grooved. Tibia with one reterolateral and one dorsal trichobothria, dorsal tibial apophysis (DTA) thumb-shaped with blunt end in dorsal view; cymbium unmodified; paracymbium (PC) sclerotized, with long hook-shaped ventral projection with pointed end, almost reaches to the proximal end of the tibia in retrolateral view; tegulum (T) ventrally with finger like projection; protegulum (PT) broad, membranous, with blunt tip protruding upward; distal suprategular apophysis (DSA) slightly curved, distal end membranous. Tailpiece (TP) of embolic division sclerotized, curved with blunt tip; embolic membrane (EM) running parallel with embolus. Embolus (E) long, sclerotized, coiled, almost forming a complete transverse circle.
Female (paratype, Figs 215D, E): Total length: 2.02. Carapace 0.84 long, 0.63 wide, brown, cephalic region slightly elevated, cervical and radial grooves distinct. Clypeus 0.15 high. Chelicerae with five promarginal and six retromarginal teeth. Sternum longer than wide, yellow with microsetae. Eyes: AER recurved, PME procurved. Eye sizes and interdistances: AME 0.03, ALE 0.06, PME 0.06, PLE 0.05, AME–AME 0.02, PME–PME 0.03, AME–ALE, 0.03, PME–PLE 0.04, AME–PME 0.04, ALE–ALE 0.24, PLE–PLE 0.27, ALE–PLE contiguous. Length of legs: I 2.14 (0.65, 0.75, 0.40, 0.34), II 1.9 (0.56, 0.66, 0.38, 0.30), III 1.64 (0.51, 0.52, 0.34, 0.27), IV 2.11 (0.62, 0.75, 0.41, 0.33). Tibial spine formula: 2-2-1-1. TmI 0.32 and TmIV absent. Opisthosoma 1.44 long, 1.04 wide, oval, grey, densely covered with fine spines.
Epigyne (Figs 214A–C): Ventral plate (VP) wider than long, with a common small cusp-shaped scapoid (SCD) on anterior margin; copulatory opening (CO) present antero-laterally in shallow cavity; copulatory ducts (CD) long, running parallel with the lateral wall of ventral plate. Dorsal plate (DP) completely visible in ventral view. Spermathecae (S) present near the posterior margin of dorsal plate. Fertilization ducts (FD) short extending mesally.
Distribution. Known from type localities (Guizhou, Hubei and Hunan Provinces, Figs 310, 314, 315).
description: Published as part of Irfan, Muhammad, Zhou, Gu-Chun, Peng, Xian-Jin & Zhang, Zhi-Sheng, 2025, Survey of Linyphiidae spiders (Arachnida: Araneae) from some Oriental Regions of China, pp. 1-248 in Megataxa 15 (1) on pages 163-167, DOI: 10.11646/megataxa.15.1.1, http://zenodo.org/record/14985176