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

urn:lsid:zoobank.org:act: 04A2A54B-80C1-4672-BEEA-4C9886BBF3FF

Figs 3 F-G, 7 C-D, 8 C-E, 9, 94

Material Examined. Holotype: CHINA: Yunnan: Longling Co., Longjiang Township, Xiao Hei Shan Nature Reserve, 1.2 km SSE of Route S317 at km 23.5, 24.82888°N, 98.76001°E, 2020 m, 26 May 2005, good primary broadleaf forest, dusting webs in understory, C. Griswold, CGY126 (CASENT 9022370, HNU), 1 ♀.

Paratypes: [same data as holotype] (CASENT 9022369, HNU), 2 ♀; [same locality] 26 May 2005, good primary broadleaf forest, night collecting, C. Griswold, D. Kavanaugh, CGY127 (CASENT 9022395, CAS), 2 ♀; [same locality] 27-28 May 2005, good primary broadleaf forest, dusting webs in understory, C. Griswold, CGY128 (CASENT 9029347, CAS), 2 ♀; [same data] (CASENT 9022372, CAS), 1 ♀; [same locality] 28 May 2005, good primary broadleaf forest, night collecting, C. Griswold, D. Kavanaugh, CGY129 (CASENT 9022171, HNU), 2 ♀; 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 9022032, HNU), 1 ♀ .

Etymology. Formed from the Chinese words for ground (dì) and net (wăng

); the webs of these spiders are built just above the leaf litter (Fig. 7 C-D).

Diagnosis. Distinguished from well known Asian Theridiosoma species by the details of the genitalia including the presence of a notch along the posterior margin (contrast with T. taiwanica Zhang, Zhu & Tso, 2006: fig. 2) and the lack of paired processes (as in T. epeiroides Bösenberg & Strand, 1906, see Brignoli 1981: fig. 9; T. shuangbi sp. n.: Fig. 3H). Some species never illustrated or inadequately described are not considered in this diagnosis.

Description. Carapace brown with darker patches in thoracic and head regions (Fig. 8 C-D). Sternum yellow with wide dark brown margin (Fig. 8E). Legs yellow to brown with distal part of metatarsi darker (especially leg IV). Abdomen tan with dark gray with silver patches (Fig. 8 C-D).

Vulva: Epigynum a flat plate with median notch on posterior margin (Figs 3F, 9A); with pair of round lateral pits (Fig. 9B). Spermathecae subspherical, juxtaposed; copulatory ducts short, wide, ectal to spermathecae; fertilization ducts arise from posterolateral part of spermathecae, terminate in spiral tip just posterior to spermathecae (Fig. 3G).

Female (CASENT 9022395): Total length 1.60, carapace 0.75 long, 0.63 wide, clypeus 0.10, sternum 0.38 long, 0.35 wide, coxa IV separated by 1.30 times their width. Posterior median eyes juxtaposed. Macrosetae: Leg I: patella d1, tibia d2, p1; Leg II: patella d1, tibia d2, v2; Leg III: patella d1, tibia d1; Leg IV: patella d1, tibia d1. Metatarsal trichobothria: TmI: 0.14; TmII: 0.16; TmIII: 0.20. Leg measurements: see Appendix A. Spinnerets (Fig. 9 C-F).

Male unknown.

Natural History. This species builds an orb web above leaf litter (Fig. 7 C-D) with the orb pulled into a cone.