Porrhomma longjiangense Zhu & Wang 1983

• Main Author: Růžička, Vlastimil
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2018
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Arachnida; Araneae; Linyphiidae; Porrhomma; Porrhomma longjiangense; Sakhalin
• Online Access: https://doi.org/10.5281/zenodo.5963983; http://treatment.plazi.org/id/03C6A93BFFC8FFF5FF7CF93F87B83DAB

Porrhomma longjiangense Zhu & Wang, 1983 Figs. 25A–F. Porrhomma longjiangensis Zhu & Wang, 1983 — Zhu & Wang (1983): p. 148, Figs. a–e (descr. ♀); synonymised with P. rakanum Yaginuma & Saito, 1981 by Li & Song (1993): p. 250, 256. P. longjiangensis — Zhu et al. (1986): p. 207, Figs. 3a–b (descr. ♂). P. longjiangensis — Eskov & Marusik (1993): p. 52, Figs. 45–48 (♂ ♀). P. longjiangense — Marusik & Koponen (2000): p. 62; removed from synonymy with P. rakanum. P. longjiangense — Marusik et al. (2001): p. 87; removing from synonymy with P. rakanum confirmed. P. longjiangense — Tanasevitch (2012): p. 372, Figs. 15–22 (♂ ♀); removing from synonymy with P. rakanum confirmed. Material examined. RUSSIA: Sakhalin Isl., CE part, Leonidovka River, 8 km SE of Leonidovo Vill., 49°16.506'N, 142°58.390'E, 9 Aug 2001, 11 Ƌ 23 ♀, leg. Yu. M. Marusik (CYM). Diagnosis. Among four species of the magnum -group, P. longjiangense and P. magnum have developed eyes with black rings around. P. longjiangense can be distinguished from P. magnum by fully developed eyes (Fig. 25A) and Fe III–IV without dorsal spines. Description. ♀ (from Sakhalin Island, Russia, 9 Aug 2001). Carapace orange-brown, 0.90 mm wide, eyes normal, PME–PME = 1.0 (Fig. 25A). Abdomen brown-grey. Fe I–II with one dorsal spine, Fe I with one prolateral spine. Ti I with one prolateral spine, Ti I–II with one retrolateral spine. Tm Mt I = 0.30, Mt I/CW = 1.17. Epigynum with lateral wings (Fig. 25C). Copulatory ducts are very long, with ascending, descending, and again ascending part (Figs. 25D–F). Ƌ (together with female). The AP is shorter than wide, with a convex upper edge, the space between AP and PA very narrow. Embolus very long with a broad velum. Velum with a pigmented spot (Fig. 25B). Variation. Ƌ ♀. Carapace 0.84–0.96 mm wide. Tm Mt I = 0.27–0.31, Mt I/CW = 1.10–1.17 (n = 6). Ecology. Under stones on river banks (Eskov & Marusik 1993), in mosses and leaf litter (Tanasevitch 2012). Global distribution. Russian Far East, ...