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Ceriodaphnia dubia
Ceriodaphnia dubia
Ceriodaphnia dubia Ceriodaphnia dubia
Phylum Arthropoda
Subphylum Crustacea
Class Branchiopoda
Suborder Cladocera
Family Daphniidae
Distinguishing Characteristics
  • Rostrum absent
  • Head small and depressed
  • Cervical sinus present
  • Postabdominal claw with central pecten: two pecten morphotypes have been found in C. dubia (1). A fine pecten morph consisting of 18-24 narrow teeth with nearly parallel sides and an uncommon toothed pecten morph which has 7-14 close set ovately tapered teeth. The pecten on the fine morph may be indistinguishable at magnifcation powers less than 400x.
Additional Notes
  • May be closely related and commonly confused with Ceriodaphnia reticulata; hybridization may occur between the two.
  • Commonly used in toxicological bioassays by the US EPA.
Additional Pictures
Quicktime Movies

(1) BERNER, D.B. 1986. Taxonomy of Ceriodaphnia (Crustacea: Cladocera) in U.S. Environmental Protection Agency cultures.   EPA/600/4-86/032.