New species in the rheophilous genus Nicsmirnovius Chiambeng & Dumont, 1999 (Branchiopoda: Anomopoda: Chydoridae) and reassignment of Alona eximia Kiser, 1948 and Alonella fitzpatricki Chien, 1970 |
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Authors: | Kay Van Damme George Chiambeng Suphiyanit Maiphae Henri Jean Dumont |
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Institution: | (1) Laboratory of Animal Ecology, Department of Biology, State University of Ghent, Ledeganckstraat 35, B – 9000 Ghent, Belgium;(2) Research Station for Fisheries and Oceanography (IRAD), Batoke, PMB 77 Limbe, Cameroon;(3) Department of Biology, Faculty of Science, Prince of Songkla University, Hat-Yai, Songkhla, 90112, Thailand |
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Abstract: | A morphological comparison of specimens previously assigned to Alona eximia Kiser, 1948 from tropical Africa, Eastern Asia and the Americas shows that this species-group shares a number of morphological characters on the postabdomen, head pores, first antenna and second and fourth limb that separate them from Alona Baird, 1843 but unite them with Nicsmirnovius Chiambeng & Dumont, 1999. Alonella fitzpatricki Chien, 1970, formerly believed to be a junior synonym of A. eximia, is separated from the latter and assigned to the genus Nicsmirnovius. Two new taxa, from Africa and the Island of Socotra (Yemen) are added to the genus. The relationship between the specialised habitat of these chydorids and their morphology is discussed. The geographic range of all known populations is figured and a key to species is presented. |
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Keywords: | Nicsmirnovius greeni n sp Nicsmirnovius camerounensis dioscoridus subsp n Chydoridae taxonomy Alona eximia Alonella fitzpatricki |
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