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

Xinlu Shi; Sen Xu; Chenchen Xue; Xiaona Huang; Guijie Liu; Yuanjun Zhao

doi:10.1007/s00343-011-0010-1

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

Updated：2023-05-16

- Discovery of males of Simocephalus himalayensis (Cladocera, Simocephalus), with the re-description of females
- Journal of Oceanology and Limnology Vol. 29, Issue 1, Pages: 206-212(2011)
- Affiliations：
  
  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
- Author bio：
- Funds：
- DOI：10.1007/s00343-011-0010-1
  CLC：
- Online First：15 January 2011，
  
  Published：2011
- Accepted：
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Shi, X., Xu, S., Xue, C. et al. Discovery of males of Simocephalus himalayensis (Cladocera, Simocephalus), with the re-description of females., Chin. J. Ocean. Limnol. 29, 206–212 (2011). https://doi.org/10.1007/s00343-011-0010-1
DOI：

Shi, X., Xu, S., Xue, C. et al. Discovery of males of Simocephalus himalayensis (Cladocera, Simocephalus), with the re-description of females., Chin. J. Ocean. Limnol. 29, 206–212 (2011). https://doi.org/10.1007/s00343-011-0010-1 DOI：

摘要

Abstract

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.

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references

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Chen S, Shi X, Shi X. 1992. Description of a new subspecies of Simocephalus himalayensis Chiang et Chen, 1974 (Crustacea: Diplostraca). Natural Sciences Journal of Harbin Normal University, 8: 91–95. (in Chinese with English abstract).

Chiang S, Chen S. 1974. Crustacean in the Everest Area in China. In: Scientific Survey Reports on Biology and Alpine Physiology in the Everest Area in China. Science Press, Beijing, China. p. 127–136. (in Chinese)

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Shi X, Shi X. 1996. On the species and distribution of Simocephalus in Heilongjiang Province, China. Acta Zootaxonomica Sinica, 21: 263–276. (in Chinese with English abstract)

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