中国离鞘隐翅虫属一新种(鞘翅目,隐翅虫科,异形隐翅虫亚科)

记述中国离鞘隐翅虫属1新种,二郎山离鞘隐翅虫Platystethus erlangshanus sp.nov.,记录本属的4个已知种,沙离鞘隐翅虫Platystethus arenarius(Geoffroy),1785,天离鞘隐翅虫Platystethus tian Zheng,2000,膜离鞘隐翅虫Platystethus dilutipennis Cameron,1913和凹离鞘隐翅虫Platystethus crassicornis M otschulsky,1857,这些种首次在四川一些地区被记录。列出10个中国已知种的检索表。所有模式和观察标本保存在西华师范大学西南野生动植物资源保护教育部重点实验室。

A NEW SPECIES OF THE GENUS PLATYSTETHUS FROM CHINA(COLEOPTERA,STAPHYLINIDAE,OXYTELINAE)

This paper deals with a new species of the genus Platystethus from China P.erlangshanus sp.nov.Four species of the genus,P.arenarius(Geoffroy) ,1785,P.tian Zheng,2000,P.dilutipennis Cameron,1913 and P.crassicornis Motschulsky,1857 are described for the first time in Sichuan,China.A key to the 10 Chinese species of the genus is provided.Specimens studied are deposited in the Key Laboratory of Southwest China Wildlife Resources Conservation(Ministry of Education) ,China West Normal University.Platystethus erlangshanus sp.nov.(Figs 1-7) This new species is allied to Platystethus arenarius(Geoffroy) ,but differs in:1) bigger figure and bigger punctures on head and pronotum;2) yellow to brownish yellow elytra with unclear longitudinal ridge;3) having a square process in the middle of apical margin of sternite 7;4) slight rounded in posterior margin of medium plate of sternite 8;5) having more bigger parameres of aedeagus.Length of body:♂ 3.6-6.0 mm,♀ 3.2-5.9 mm;length of pronotum:♂ 0.9-1.2 mm,♀ 0.7-0.9 mm;length of elytra:♂ 0.8-1.3 mm,♀ 0.8-1.2 mm.Holotype ♂,Sichuan,Tianquan County(29°49’-30°13’N,102°17’-102°37’E;alt.2 800 m) ,6 Sep.2005,collected by YAN Xiang-Hui.Paratypes:9♂♂,16♀♀,same data as holotype;13♂♂,4♀♀,same place as holotypes,collected by LI Yu-Jie;10♂♂,8♀♀,Sichuan,Mianning County(28°50’-29°02’N,101°58’-102°15’E;alt.3 440 m) ,29 Aug.2005,collected by XIAO Fan.Etymology.The species name is derived from the type locality Mt.Erlang.