单军生,任国栋

(河北大学 生命科学学院，河北省动物系统学与应用重点实验室，河北 保定　071002)



中国喜马拉雅山宽额甲属2新种记述(鞘翅目：拟步甲科)

单军生,任国栋

(河北大学 生命科学学院，河北省动物系统学与应用重点实验室，河北 保定071002)

宽额甲属AscelosodisRedtenbacher,1868是青藏高原喜马拉雅地区的1个特有类群，迄今已记录25个物种.本文报道来自西藏的2个新种，分别是直缘宽额甲A.rectussp.nov.和聂拉木宽额甲A.nyalamensissp.nov.，并给出2新种的形态特征描述、形态特征图及其与近缘种的示差鉴别.

鞘翅目；拟步甲科；宽额甲属；新种；西藏

Ascelosodis rectus sp.nov.(Figs.1,2)

The new species resemblesAscelosodisschmidiKaszab,1965,with the following differences:anterior margin of clypeal lobe weakly sinuate;genae gradually wider before eyes;pronotum with anterior angles obtuse,rounded apically and with anterior margin shortly prominent in the middle;the fifth abdomen extending the end straight.

Etymology:Named after the fifth abdomen extending the end straight.

Holotype:♂,China,Tibet,Lhazê,Cuola Mountain,28°53.959′N,87°25.182′E;alt.5 064 m,2 August 2011,collected by Ren Guodong.Paratypes:16♂27♀,same data as the holotype.

Ascelosodis nyalamensis sp.nov.(Figs.3,4)

The new species resemblesA.emarginataRen & Shi,2006,with the following differences:Sides of prothorax and elytra with very sparsely ciliate beneath;pronotal surface with coarse punctures,slightly denser on disc than on sides and rugae between disc and sides;elytra base with obscure but finely entire bordered;Elytra surface with sparsely and obscurely shallow punctures.

Etymology:Named after the type locality.

Holotype:♂,China,Tibet,Nyalam,Mainpu,Tulong,28°25.841′N,86°08.840′E,Alt.4 478 m,30 July 2014,collected by Ren Guodong.Paratypes:1♂3♀,collected by Ren Guodong,Bai Xinglong and Shan Junsheng，same data as the holotype.

宽额甲属AscelosodisRedtenbacher,1868[1]的分类体系几经变动，最初被放在鳖甲族Tentyriini[2-3]；随后Doyen[4]根据雌性生殖管(internal female tract)和交合刺(spiculum)等特征将其移入Eurymetopini Casey,1907[5]，Löbl et al.[6]最新记录其为鳖甲族Tentyriini.迄今该属全球记录25种(Redtenbacher(1868)1种，Bates(1879)6种，Blair(1923)5种，Koch(1943,1948)2种，(1959,1965,1968)3种，Kaszab et al.(1978)1种，Ren & Shi(2006,2007)6种[1,7-21])，已知分布东至中国西藏朗县，西至阿富汗，南至喜马拉雅山脉，北至新疆南缘.该属中国已知20种(含本文新种)，主要分布于中国西藏.作者在整理该地区该属标本时，从中发现2个至今尚未报道的物种，分别是直缘宽额甲A.rectussp.nov.和聂拉木宽额甲A.nyalamensissp.nov.模式标本保存于河北大学博物馆.

1　研究材料与方法

研究标本采自中国西藏地区，保存于河北大学博物馆.标本由Nikon SMZ800鉴定，并用Leica M205A stereomicroscope 进行拍照并测量，后期用Adobe Photoshop CS6 进行图片处理.生殖器及第Ⅷ背、腹板均用甘油保存.

2　新种记述

2.1直缘宽额甲，新种Ascelosodis rectus sp.nov.(图1,2)

体卵圆形，黑色，具弱光泽，体下、触角、上唇、口须及足棕黑色.身体侧缘被稀疏长毛.

雄性(图1a～d,g～j)：唇基宽短，前缘弧凹，略长过颊侧叶，额唇基沟浅凹；……