Theridiosoma shuangbi Miller, Griswold & Yin, 2009

Miller, Jeremy, Griswold, Charles & Yin, Chang, 2009, The symphytognathoid spiders of the Gaoligongshan, Yunnan, China (Araneae: Araneoidea): Systematics and diversity of micro-orbweavers, ZooKeys 11 (11), pp. 9-195 : 26-27

Theridiosoma shuangbi Miller, Griswold & Yin , sp. n.

urn:lsid:zoobank.org:act:624239B5-E929-4492-872E-25575391B796

Figs 3 H-I, 95

Material Examined. Holotype: CHINA: Yunnan: Long ling Co., Longjiang Township, Xiao hei shan Nature Reserve (Gu Cheng Shan Mtn.), 24.82886°N, 98.75917°E, 2010 m, 26 May 2005, in the forest, Yan Heng-mei, GKJ026 (CASENT 9022033, HNU), 1 ♀.

Etymology. Formed from the Chinese words for pair (shuāng) and arm (bì), referring to the paired processes on the epigynum.

Diagnosis. Distinguished from T. epeiroides (the only other Asian Theridiosoma species with lateral processes of the epigynum) by the shape and orientation of the apophyses, directly towards each other in T. shuangbi ( Fig. 3H ), posteromesally in T. epeiroides ( Brignoli, 1981: figs 9, 10).

Description. Carapace dusky pale yellow, darker centrally and through head region. Sternum dusky pale yellow with darker margin. Legs orange. Abdomen off white with pair of medium gray stripes running posteriorly from anterodorsal part of abdomen, converging to a single stripe running to spinneret region.

Vulva: Epigynum a flat plate with small median process, with pair of oblong lateral pits, lateral processes arise from near outside margin, run towards each other on longitudinal axis, tips rounded ( Fig. 3H ). Spermathecae and copulatory ducts both touching medially ( Fig. 3I ).

Female (holotype): Total length 2.00, carapace 0.72 long, 0.61 wide, clypeus 0.14, sternum 0.39 long, 0.38 wide, coxa IV separated by 1.41 times their width. Posterior median eyes nearly juxtaposed. Macrosetae: Leg I: patella d1, tibia d2, p1, r1; Leg II: patella d1, tibia d2, r1; Leg III: patella d1, tibia d1; Leg IV: patella d1, tibia d1. Metatarsal trichobothria: TmI: 0.22; TmII: 0.25; TmIII: 0.21. Leg measurements: see Appendix A.

Male unknown.

Figures

Figure 3. A, B, Epeirotypus dalong sp. n. from Fugong Co.; C, D, Ogulnius barbandrewsi sp. n.; C from Guocai He at Fucai; D from No. 12 Bridge Camp area; E, Baalzebub nemesis sp. n. from No. 12 Bridge Camp area; F, G, Theridiosoma diwang sp. n. from Xiao Hei Shan Nature Reserve; H, I, Theridiosoma shuangbi sp. n. from Xiao Hei Shan Nature Reserve. A, C, E, F, H, epigynum, ventral view; B, epigynum, posterior view; D, G, I, cleared vulva, dorsal view. CD: copulatory duct; S: spermatheca; arrow in A indicates transverse submarginal groove; in G and I indicate lateral pits, in H indicates base of one of two opposing lateral apophyses.

Figure 95. Distribution map, inset map shows study area. Blue: Baalzebub nemesis sp. n.; red: Theridiosoma shuangbi sp. n.; purple: Mysmena jinlong sp. n.; yellow: Crassignatha longtou sp. n.