Pistius rotundus Tang &amp; Li 2010, sp. nov.
Creators: name: Tang, Guo
name: Li, Shuqiang
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Thomisidae
Pistius
Pistius rotundus

description: <i>Pistius rotundus</i> sp. nov. Figs 39–41 Type material. <b>Holotype:</b> &amp;male;, <b>CHINA: <i>Yunnan:</i></b> Xishuangbanna, Mengla County, Menglun Town, Menglun Nature Reserve, secondary tropical seasonal moist forest (N21º54.607', E101º17.005', 633 m), 28 July 2007, leg. G. Zheng (Zheng_sp916). <b>Paratypes: CHINA: <i>Yunnan:</i></b> Xishuangbanna, Mengla County, Menglun Town, Menglun Nature Reserve, leg. G. Zheng: 12 &amp;male;, 4 &amp;female;, same data as holotype; 6 &amp;male;, 1 juvenile &amp;female;, secondary tropical seasonal moist forest (N21º54.718', E101º16.940', 645 m), 27 July 2007 (Zheng _sp1121); 1 &amp;male;, 1 juvenile &amp;male;, secondary tropical seasonal moist forest (N21º54.948', E101º16.982', 656 m), 10 August 2007 (Zheng _sp228); leg. G. Tang and Z.Y. Yao: 2 &amp;female;, Lvshilin Forest Park, Limestone tropical seasonal rain forest (N21º54.705', E101º16.898', 656 m), 13 November 2009 (Tang-Yao _ No. 4); 1 &amp;female;, Lvshilin Forest Park, Limestone tropical seasonal rain forest (N21º54.710', E101º16.941', 652 m), 15 November 2009 (Tang-Yao _ No. 9); 1 &amp;female;, Lvshilin Forest Park, Limestone tropical seasonal rain forest (N21º54.609´, E101º17.090´, 643 m), 17 November 2009 (Tang-Yao _ No. 13). <b>Etymology.</b> The specific name comes from the Latin word <i>rotundus</i> (round), referring to the embolus twisted round in retrolateral view, adjective. <b>Diagnosis.</b> This new species can be easily distinguished from <i>P. truncatus</i> (Pallas, 1772) and <i>P. undulatus</i> Karsch, 1879 by the slender, twisted embolus. <b>Description. Male</b> (holotype measured): Total length 4.00. Prosoma 1.80 long, 1.80 wide; opisthosoma 2.25 long, 2.10 wide. Prosoma flat, dorsally greenish brown. Eye tubercles grayish white. Eye measurements: AME 0.07; ALE 0.11; PME 0.06; PLE 0.10; AME–AME 0.18; AME–ALE 0.12; PME–PME 0.18; PME–PLE 0.26. MOA length 0.28 with front width 0.32 and back width 0.31. Chelicerae brown, gnathocoxae, labium yellow, sternum yellow with grayish black rim. Legs yellow. Leg measurements: I: 8.30 (2.40, 3.10, 1.90, 0.90); II: 8.20 (2.40, 3.00, 1.90, 0.90); III: 3.00 (1.00, 1.10, 0.50, 0.40); IV: 3.10 (1.00, 1.20, 0.50, 0.40), leg formula: 1243. Opisthosoma widest at the 2/3 position. opisthosoma dorsally yellow with grayish black markings, dorsally also with some small brown spots which each mounted with a short seta. The lateral with grayish black lines, venter yellow. <i>Palp</i> (Figs 39 B–D, 41 A–B). VTA digitiform, combined with ITA basally; ITA with a small, sharp membranous ramus; RTA bifurcated, the dorsal ramus sclerotized, pointed distally; cymbium dorsally with a brush of scopulae in anterior part (Fig. 39B), tegulum with a tongue-shaped apophysis, embolus slender and twisted around tegulum and in a free distal loop. <b>Female</b> (one of the paratypes measured): Total length 5.30. Prosoma 2.20 long, 2.50 wide. Opisthosoma 2.50 long, 3.20 wide. Body lighter than in male. Eye measurements: AME 0.07; ALE 0.12; PME 0.06; PLE 0.11; AME– AME 0.24; AME–ALE 0.16; PME–PME 0.24; PME–PLE 0.36. MOA length 0.32 with front width 0.38 and back width 0.36. Leg measurements: I: 8.70 (2.80, 3.30, 1.80, 0.80); II: 8.60 (2.80, 3.20, 1.80, 0.80); III: 3.70 (1.10, 1.50, 0.60, 0.50); IV: 3.60 (1.10, 1.40, 0.60, 0.50), leg formula: 1234. Opisthosoma dorsally grayish white with black markings, dorsally also with small brown spots and setae. <i>Epigynum</i> (Figs 40 B–C, 41 C–D). Epigynum with a small anteriorly situated hood covered by a transparent sclerotized plate, copulatory openings bilaterally, copulatory duct soft tube-shaped, long, twisted; spermathecae short. <b>Variation.</b> Total length: &amp;male; 3.30–4.30 (n=11); &amp;female; 4.80–5.60 (n=16). <b>Distribution.</b> China (Yunnan). <b>Remarks.</b> The genera <i>Massuria</i> Thorell 1887 and <i>Pistius</i> Simon, 1875 have been systematically confused by most Indian authors, and most or all species of the genus <i>Pistius</i> described from India were probably misplaced and belong to <i>Massuria</i> Thorell, 1887 (Lehtinen, 2005).
description: Published as part of <i>Tang, Guo &amp; Li, Shuqiang, 2010, Crab spiders from Xishuangbanna, Yunnan Province, China (Araneae, Thomisidae) 2703, pp. 1-105 in Zootaxa 2703</i> on pages 54-56
description: {"references": ["Thorell, T. (1887) Viaggio di L. Fea in Birmania e regioni vicine. II. Primo saggio sui ragni birmani. Annali del Museo civico di storia naturale di Genova, 25, 5 - 417.", "Lehtinen, P. T. (2005) Taxonomic notes on the Misumenini (Araneae: Thomisidae: Thomisinae), primarily from the Palaearctic and Oriental regions. In: Logunov, D. V. &amp; Penney D. (Eds.), European Arachnology 2003 (Proceedings of the 21 st European Colloquium of Arachnology, St. - Petersburg, 4 - 9 August 2003). Arthropoda Selecta, Special Issue, 1, 147 - 184."]}