Porrhomma longjiangense Zhu & Wang, 1983

Růžička, Vlastimil, 2018, A review of the spider genus Porrhomma (Araneae, Linyphiidae), Zootaxa 4481 (1), pp. 1-75 : 31-33

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, northeastern China after Tanasevitch (2012), Marusik et al. (2001) and this paper. See Fig. 26 .

Figures

FIGURE 3. A–B, Porrhomma microphthalmum, male palp. A, retrolateral view. B, prolateral view. Abbreviations as in Fig. 2. V, velum. Scale bar, 50 µm.

FIGURE 15. A–F, Porrhomma campbelli from Stožec-Dobrá, Czechia; except B, Harrachov, Czechia. A, ♀ carapace, frontal view. B, embolic section. C, epigynum. D–F, vulva, ventral, caudal and dorsal. Scale bars, 0.1 mm.

FIGURE 16. Global distribution of Porrhomma campbelli.

FIGURE 17. A–F, Porrhomma cavernicola from Devil’s Den Cave, Arkansas. A, ♀ carapace, frontal view. B, embolic section. C, epigynum. D–F, vulva, ventral, caudal and dorsal. Scale bars, 0.1 mm.

FIGURE 18. Global distribution of Porrhomma cavernicola.

FIGURE 19. A–F, Porrhomma convexum from Teplice nad Bečvou, Czechia; except B, Pec pod Sněžkou, Czechia. A, ♀ carapace, frontal view. B, embolic section. C, epigynum. D–F, vulva, ventral, caudal and dorsal. Scale bars, 0.1 mm.

FIGURE 20. Global distribution of Porrhomma convexum.

FIGURE 21. A–F, Porrhomma egeria from Sloup, Czechia. A, ♀ carapace, frontal view. B, embolic section. C, epigynum. D– F, vulva, ventral, caudal and dorsal. Scale bars, 0.1 mm.

FIGURE 22. Global distribution of Porrhomma egeria.

FIGURE 25. A–F, Porrhomma longjiangense from Sakhalin Island, Russia. A, ♀ carapace, frontal view. B, embolic section. C, epigynum. D–F, vulva, ventral, caudal and dorsal. Scale bars, 0.1 mm.

FIGURE 26. Global distribution of Porrhomma longjiangense.

FIGURE 45. A–F, Porrhomma pallidum from Srní, Czechia; except B, Nižbor, Czechia. A, ♀ carapace, frontal view. B, embolic section. C, epigynum. D–F, vulva, ventral, caudal and dorsal. Scale bars, 0.1 mm.

FIGURE 46. Global distibution of Porrhomma pallidum.

FIGURE 47. A–F, Porrhomma profundum from Domica Cave, Slovakia. A, ♀ carapace, frontal view. B, embolic section. C, epigynum. D–F, vulva, ventral, caudal and dorsal. Scale bars, 0.1 mm.

FIGURE 48. Records of Porrhomma profundum.