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Two new species of DiaphanosomaFischer, 1850(Crustacea: Branchiopoda: Cladocera) from the United States

✍ Scribed by Nikolai M. Korovchinsky

Publisher: John Wiley and Sons
Year: 2005
Tongue: English
Weight: 158 KB
Volume: 90
Category: Article
ISSN: 1434-2944
DOI: 10.1002/iroh.200410748

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✦ Synopsis

Two new species of the genus Diaphanosoma, D. oligosetum and D. dorotheae, from Louisiana and North Carolina respectively, are described. The former species has large head with protruding dorsal part, large lanceolate spine on the basipodite's distal outer end, an extremely reduced number of antennal setae, up to six in adult specimens, and unique armament of valve margin. On the whole, it shows the pronounced combination of primitive and specialized morphological traits. D. dorotheae is a member of D. brachyurum species group differing from its other known representatives in presence of a small but very conspicuous spine on the end of proximal segment of antennal exopodite and a variable number of setae (seven or eight) on the distal segment of the branch.

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