Discovery of males of Simocephalus himalayensis (Cladocera, Simocephalus), with the re-description of females  

作　　者：施心路 徐森 薛晨晨 黄小娜 刘桂杰 赵元莙 

机构地区：[1]Hangzhou Key Laboratory for Animal Adaptation and Evolution and Laboratory of Experimental Animal Science,Hangzhou Normal University [2]State Key Laboratory of Freshwater Ecology and Biotechnology,Institute of Hydrobiology,Chinese Academy of Sciences [3]Key Laboratory of Animal Biology,Chongqing Normal University [4]Great Lakes Institute for Environmental Research,University of Windsor

出　　处：《Chinese Journal of Oceanology and Limnology》2011年第1期206-212,共7页中国海洋湖沼学报（英文版）

基　　金：Supported by the National Natural Science Foundation of China (No.31071880,31030059);National Key Laboratory of Freshwater Ecology and Biotechnology of China (No.2009FB11);Hangzhou Key Laboratory for Animal Adaptation and Evolution,Hangzhou Normal University (No.2010100333T05)

摘　　要：The lack of data concerning the morphology of male cladocerans greatly impedes our understanding of the systematics of cladocerans. This is because the differentiation of males is of significant importance for distinguishing closely related species. Simocephalus himalayensis himalayensis Chiang & Chen, 1974 (Cladocera, Simocephalus) is an endemic cladoceran species in the Tibetan plateau, China. To date, no information has been available regarding the morphology and biology of its males. In this study, we provide the morphological and biological data of the males that were produced in laboratory populations. The male individuals are about 1.01–1.20 mm long; the margin of antennulae possess two sensory papilla; dorsal valve margin smooth. Two vas deferens are located between the supra-anal angle and the proximal anal teeth. Sperm is round with a diameter of two micrometers. An updated morphological description and reproductive data of the females of this species are also provided.The lack of data concerning the morphology of male cladocerans greatly impedes our understanding of the systematics of cladocerans. This is because the differentiation of males is of significant importance for distinguishing closely related species. Simocephalus himalayensis himalayensis Chiang ＆ Chen, 1974 （Cladocera, Simocephalus） is an endemic cladoceran species in the Tibetan plateau, China. To date, no information has been available regarding the morphology and biology of its males. In this study, we provide the morphological and biological data of the males that were produced in laboratory populations. The male individuals are about 1.01-1.20 mm long; the margin of antennulae possess two sensory papilla; dorsal valve margin smooth. Two vas deferens are located between the supra-anal angle and the proximal anal teeth. Sperm is round with a diameter of two micrometers. An updated morphological description and reproductive data of the females of this species are also provided.

关 键 词：CLADOCERA Simocephalus Simocephalus himalayensis MALE MORPHOLOGY 

分 类 号：Q958.8[生物学—动物学]