原狭蚌虫属一新种(鳃足纲:介甲目)

A NEW SPECIES OF THE GENUS EOLEPTESTHE- RIA FROM SHANDONG, CHINA (CRUSTACEA: CONCHOSTRACA)

作者于1987年6月自山东省兖州县淡水养殖试验场鱼池中发现原狭蚌虫属的一个新种——兖州原狭蚌虫Eoleptestheria yanchowensis sp.nov.作者对新种的形态特征进行了详细描述,并与中国原狭蚌虫Eoleptestheria chinensis Daday 1923,及东平原狭蚌虫Eoleptestheria dongpingensis Hu 1987。作了比较。

Eoleptestheria yanchowensis sp. nov. (figs. 1-21)Holotype ♂ (Yc8706121); allotype ♀ (Yc8706122); paratypes 4♂♂ 4♀♀ (Yc 8706123), Yanchow (117°08’E, 357°8’N); Jun. 12, 1987; 2♂♂ 3♀♀, Yanchow, 1966.All types are deposited in the Department of Hydrobiology, Shandong Fishery School.Male with 12 growth lines,ventral margin of the shell with short setae arranged regularly, anterior margin of the shell curved but its dorsal margin slightly arched, postero-dorsal angle evident, posterior margin obtused rounded, shell length 10.0-11.0 mm, shell height 6.5-7.0mm, shell-width 4.0-4.1mm.Female with 12 growth lines, dorsal margin of the shell evidently arched than that of the male, shell length 9.8mm, shellheight 6.0mm, shell width 3.0mm, occital angle almost right angle.This new species is related to E. chinensii Daday, 1923, and E. dongpingensis Hu 1987. The differences between them are given in Table 1.