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《Journal of Shaanxi Normal University(Natural Science Edition)》 2009-02
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A taxonomic study of the genus Ptygonotus Tarbinsky (Othoptera:Arcypteridae) from China, with description of two new species

ZHENG Zhe-min,XU Shu-juan(Institute of Zoology,Shaanxi Normal University,Xi′an 710062,Shaanxi,China)  
The genus Ptygonotus Tarbinsky from China is reviewed,with 12 species recorded.Two new species,Ptygonotus rangkoueusis sp.nov.and Ptygonotus anurous sp.nov.are described.Key to species of Ptygonotus is provided.Type specimens are kept in the Institute of Zoology,Shaanxi Normal University. 1.Ptygonotus rangkouensis sp.nov.(Fig 1: a—f). This new species is allied to Ptygonotus hocashanensis Cheng et Hang,1974 and Ptygonotus xinglongshanensis Zheng et al,1994,but differs from both in: 1) the length of a segment in middle part of antennae about 1.5 times its width;2) the maximum width between lateral keels of pronotum 1.25 times its minimum width; 3) length of elytra 5 times its width;4) subgenital plate of male long conical,top acute;5) hind tibia yellow brown.It differs from the former by the length of vertex as long as horizontal diameter of eye.It also differs from the latter by the lateral keels of pronotum slightly curved in prozona. Length of body: ♂16 mm;♀20~22.5 mm; Length of elytra: ♂5 mm;♀4.5 mm; Length of hind femur: 10 mm;♀11~12 mm. Holotype ♂,Sichuan,Rangkou,102°5′E,32°3′N,14-Aug-2007,collected by Zhang Ling;Paratypes 2 ♀,same data as holotype. 2.Ptygonotus anurous sp.nov.(Fig 2: a—g). This new species is allied to Ptygonotus sichuanensis Zheng,1983 and Ptygonotus gansuensis Zheng et Chang,1994,but differs from both in: 1) anterior margin of pronotum obtuse angular;2) lateral keels of pronotum nearly parallel;3) length of prozona 2.5 times metazona;4) length of elytra 2.66 times its width.It differs from the former by the last tergite of male without furcula.It differs from the latter in:1) disc of head with a median keel;2) top of elytra reaching the hind margin of second tergite.Length of body: ♂16 mm;♀20~21 mm; Length of elytra: ♂4 mm;♀4.3~5 mm; Length of hind femur: ♂11 mm;♀11~13 mm. Holotype ♂,Sichuan: shuajingsi,102°7′E,32°3′N,13-Aug-2007,collected by Zhang Ling;Paratypes 5 ♀,same data as holotype.
【Fund】: 国家自然科学基金资助项目(39391800)
【CateGory Index】: Q969.26
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