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Two‐egged ephippia in the chydorid Cladocera
Author(s) -
FRYER GEOFFREY,
FREY DAVID G.
Publication year - 1981
Publication title -
freshwater biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.297
H-Index - 156
eISSN - 1365-2427
pISSN - 0046-5070
DOI - 10.1111/j.1365-2427.1981.tb01270.x
Subject(s) - cladocera , daphnia , branchiopoda , biology , ecology , zooplankton
SUMMARY. With a single reported exception, the ephippia of all specialized chydorid cladocerans hitherto described contain a single egg. Ephippia the European Chydorus ovalis and the North American species currently listed as C. cf. sphaericus have been found persistently, and so far invariably, to contain two eggs. The alternative strategies of producing 1‐and 2‐egged ephippia are briefly considered. Anomalous 1‐egged ephippia of Daphnia (family Daphniidae) are also mentioned.