Harpacticoida

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Harpacticoida
Harpacticoid copepod GLERL 1.jpg
Harpacticoid copepod
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Subphylum: Crustacea
Class: Maxillopoda
Subclass: Copepoda
Order: Harpacticoida
G. O. Sars, 1903
Families

See text

Harpacticoida is an order of copepods, in the subphylum Crustacea. This order comprises 463 genera and about 3,000 species; its members are benthic copepods found throughout the world in the marine environment (most families) and in fresh water (essentially the Ameiridae, Parastenocarididae and the Canthocamptidae). A few of them are planktonic or live in association with other organisms. Harpacticoida represents the second-largest meiofaunal group in marine sediment milieu, after nematodes. In Arctic and Antarctic seas, Harpacticoida are common inhabitants of sea ice.

Harpacticoids are distinguished from other copepods by the presence of only a very short pair of first antennae. The second pair of antennae are biramous, and the major joint within the body is located between the fourth and fifth body segments. They typically have a wide abdomen, and often have a somewhat worm-like body.[1]

Families[edit]

Sixty-seven families are currently recognised in the Harpacticoida:[2]

References[edit]

  1. ^ Robert D. Barnes (1982). Invertebrate Zoology. Philadelphia, PA: Holt-Saunders International. p. 692. ISBN 978-0-03-056747-6. 
  2. ^ Geoff Boxshall (2010). "Harpacticoida". World Register of Marine Species. Retrieved May 22, 2010. 

External links[edit]