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Onychodiaptomus sanguineus
Phylum Arthropoda
Subphylum Crustacea
Class Maxillopoda
Subclass Copepoda
Order Calanoida
Family Diaptomidae
Distinguishing Characteristics
  • Each caudal ramus with five setae
  • Third segment from the end of the right antenna with a slender process which is curved and usually pointed. The process is shorter than the second segment from the end of the same antenna
  • Both processes of the left fifth exopod neither digitiform nor blunt, one being distinctly falciform
  • Left fifth endopod is not rudimentary nor is it marked with transverse striae
  • Right fifth endopod shorter than the first segment of the exopod
  • Terminal segment of the right fifth exopod slender and elongated
  • Left fifth leg does not reach the end of the first segment of the right exopod
  • Specimen approximately 1.4 to 2.1 mm in length
Additional Notes
  • Other sources:
    • Boileau, M.G. and B.E. Taylor. 1994. Chance events, habitat age, and the genetic structure of pond populations. Archiv Fur Hydrobiol. 132: 191-202.
    • DeStasio, B.J. Jr. 1990. The role of dormancy and emergence pattern in the dynamics of a freshwater zooplankton community. Limnol. Oceano. 35: 1079-1090.
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