Ryojius simplex, Irfan & Wang & Zhang, 2023

Irfan, Muhammad, Wang, Lu-Yu & Zhang, Zhi-Sheng, 2023, Survey of Linyphiidae spiders (Arachnida: Araneae) from Wulipo National Nature Reserve, Chongqing, China, European Journal of Taxonomy 871, pp. 1-85 : 53-56

publication ID	https://doi.org/ 10.5852/ejt.2023.871.2129
publication LSID	lsid:zoobank.org:pub:0578106F-841E-4CD0-90F1-39CEDE96959C
DOI	https://doi.org/10.5281/zenodo.8006402
persistent identifier	https://treatment.plazi.org/id/3798EECE-5A0C-4578-8754-8D5DF908B300
taxon LSID	lsid:zoobank.org:act:3798EECE-5A0C-4578-8754-8D5DF908B300
treatment provided by	Felipe
scientific name	Ryojius simplex
status	sp. nov.

Treatment

Ryojius simplex sp. nov. (Ȓ良ǿ蛛)

urn:lsid:zoobank.org:act:3798EECE-5A0C-4578-8754-8D5DF908B300

Figs 43–45 View Fig View Fig View Fig

Differential diagnosis

The new species resembles Ryojius nanyuensis (Chen & Yin, 2000) ( Figs 43–47 View Fig View Fig View Fig View Fig View Fig ; Tu et al. 2006: figs 15–23) but can be distinguished by the lamella characteristca single branched in male palp in new species ( Fig. 43A–B, D View Fig ), whereas with two branches in R. nanyuensis (Tu et al. 2006: figs 15–16); distal part of paracymbium apex L-shaped in male palp in new species ( Fig. 43B View Fig ), whereas V-shaped in R. nanyuensis (Tu et al. 2006: fig 15). In epigyne, basal part of scape not covering all of the distal part in ventral view in new species ( Fig. 44A–B View Fig ), whereas covering most of it in R. nanyuensis (Tu et al. 2006: fig 21).

Etymology

The epithet is derived from the Latin adjective ‘ simplex ’ meaning ‘simple’ and referring to the lamella characteristca of the male palp being simple, with unmodified tip ( Fig. 43A–B, D View Fig ).

Type material

Holotype CHINA • ♂; Chongqing, Wushan County, Guanyang Town, Zhuxian Township , Putao Village ; 31°15′26.72″ N, 110°4′34.11″ E; elev. 1542 m; 6 Oct. 2020; L.Y. Wang, X.W. Zhou, T.Y. Ren, J.X. Zhao and L. Xiao leg.; SWUC-T-LIN-18-01 . GoogleMaps

Paratypes CHINA • 1 ♀; Wushan County, Guanyang Town, Zhuxian Township , Putao Village ; 31°16′8.98″ N, 110°4′34.11″ E; elev. 1445 m; 6 Oct. 2020; L.Y. Wang, X.W. Zhou, T.Y. Ren, J.X. Zhao and L. Xiao leg.; SWUC-T-LIN-18-02 . GoogleMaps

Description

Male (holotype, Figs 43 View Fig , 45A View Fig )

MEASUREMENTS. Total 2.18 long; carapace 0.98 long, 0.80 wide; abdomen 1.10 long, 0.76 wide. Eye sizes and interdistances: AME 0.04, ALE 0.07, PME 0.07, PLE 0.07, AME–AME 0.02, PME–PME 0.05, AME–ALE 0.03, PME–PLE 0.05, ALE–ALE 0.31, PLE–PLE 0.33, ALE–PLE contiguous, AME–PME 0.04.

CEPHALOTHORAX. Carapace yellowish-brown, cephalic region slightly elevated; fovea, cervical and radial grooves distinct. Clypeus 0.13 high.

CHELICERAE. With six promarginal and five retromarginal teeth.

LEG MEASUREMENTS. Legs long, yellow, covered with fine spines. Length of legs: I 2.75 (0.81, 0.93, 0.61, 0.40), II 2.58 (0.73, 0.88, 0.58, 0.39), III 2.23 (0.65, 0.72, 0.51, 0.35), IV 2.72 (0.79, 0.92, 0.59, 0.42). Leg formula I-IV-II-III. TmI 0.26 and TmIV absent. Tibial spine formula: 2-2-2-2.

ABDOMEN. Oval, light grey, dorsally with three cheverons posteriorly, ventral side light grey.

PALP ( Fig. 43 View Fig ). Patella short. Tibia with strongly sclerotised dorsal apophysis pointing laterally. Distal part of paracymbium with V-shaped apex, with broad blunt end. Pit hook on suprategulum long, distally arc-shaped with pointed end. Radix anterior part long, lancet-like. Lamella characteristca transparent, short, tip unmodified, apex retained below the anterior terminal apophysis. Anterior terminal apophysis thumb-shaped, with blunt end. Embolus conspicuously large, posteriorly curved about half circle, with conspicuous serrated area, embolus proper blunt, apex strongly sclerotized.

Female (paratype, SWUC-T-LIN-18-02, Figs 44 View Fig , 45B View Fig )

MEASUREMENTS. Total 1.83 long; carapace 0.82 long, 0.64 wide; abdomen 1.29 long, 0.58 wide. Eye sizes and interdistances: AME 0.04, ALE 0.06, PME 0.06, PLE 0.07, AME–AME 0.01, PME–PME 0.04, AME–ALE 0.02, PME–PLE 0.04, ALE–ALE 0.26, PLE–PLE 0.29, ALE–PLE contiguous, AME–PME 0.05.

CEPHALOTHORAX. Same as in male. Clypeus 0.12 high.

CHELICERAE. With six promarginal and five retromarginal teeth.

LEG MEASUREMENTS. Legs long, yellow, covered with fine spines. Length of legs: I 2.20 (0.64, 0.76, 0.43, 0.37), II 1.94 (0.57, 0.66, 0.39, 0.32), III 1.67 (0.49, 0.52, 0.36, 0.32), IV 2.11 (0.63, 0.70, 0.44, 0.34). Leg formula I-IV-II-III. TmI 0.24 and TmIV absent. Tibial spine formula: 2-2-2-2.

ABDOMEN. Same as in male.

EPIGYNE ( Fig. 44 View Fig ). Scape wider than long, basal part of scape posteriorly C-shaped; distal part of scape grooved with lateral pockets on inner surface. Stretcher conspicuous, tongue-shaped. Posterior median plate broad, somewhat rectangular. Spermathecae globular, situates dorso–laterally.

Distribution

Known from type locality.