Morphological variation of Daphnia pulex Leydig (Crustacea: Cladocera) and related species from North America

  title={Morphological variation of Daphnia pulex Leydig (Crustacea: Cladocera) and related species from North America},
  author={Stanley I. Dodson},
Several species ofDaphnia closely related toD. pulex occur commonly in North America. These species continue to be difficult to identify because of unsystematic descriptions and the continual appearance of intermediate forms. Uni-and-multivariate analyses of the morphological variation of 18 characters for each of 351 animals from 33 populations fails to demonstrate any significant clusters of populations. None of the characters, singly or in combination, serves to separate the populations into… CONTINUE READING
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