HomeInstructionsUse the keyGroupsSpeciesAnatomy
Alonopsis americana
Alonopsis americana
Alonopsis americana Alonopsis americana
Phylum Arthropoda
Subphylum Crustacea
Class Branchiopoda
Suborder Cladocera
Family Chydoridae
Ecology and Behavior
Geographic Distribution
  • New England, Newfoundland , and Nova Scotia (1)(2).
Reported Habitats
  • Along rocky lake shores (1)(2).
Reproductive Habits
  • Male and ephippial female A. americana begin to appear in October and by mid-November reproduction is mainly sexual. Individuals appear not to overwinter since their habitat is frozen over; populations are revived in the spring when the ephippia hatch (2).
Additional Notes
  • Alonopsis americana may retain old shells upon molting, but not every old shell is kept (2).
Additional Pictures

(1) CHENGALATH, R. 1982. A faunistic and ecological survey of the littoral Cladocera of Canada. Can. J. Zool. 60: 2668-2682.

(2) KUBERSKY, E.S. 1977. Worldwide distribution and ecology of Alonopsis (Cladocera: Chydoridae) with a description of Alonopsis americana sp. nov. Int. Revue ges. Hydrobiol. 62: 649-685.