Calanoida
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Calanoida is an order of copepods, a group of arthropods commonly found as zooplankton. The order includes around 46 families with about 1800 species of both marine and freshwater copepods between them.[2]
Description
Calanoids can be distinguished from other planktonic copepods by having first antennae at least half the length of the body and biramous second antennae.[2] However, their most distinctive anatomical trait is the presence of a joint between the fifth and sixth body segments.[3] The largest specimens reach 18 millimetres (0.71 in) long, but most do not exceed 0.5–2.0 mm (0.02–0.08 in) long.[2]
Classification
The order Calanoida contains the following families:[4]
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- Acartiidae
- Aetideidae
- Arctokonstantinidae
- Arietellidae
- Augaptilidae
- Bathypontiidae
- Calanidae
- Candaciidae
- Centropagidae
- Clausocalanidae
- Diaixidae
- Diaptomidae
- Discoidae
- Epacteriscidae
- Eucalanidae
- Euchaetidae
- Fosshageniidae
- Heterorhabdidae
- Hyperbionycidae
- Kyphocalanidae
- Lucicutiidae
- Megacalanidae
- Mesaiokeratidae
- Metridinidae
- Nullosetigeridae
- Paracalanidae
- Parapontellidae
- Parkiidae
- Phaennidae
- Pontellidae
- Pseudocyclopidae
- Pseudocyclopiidae
- Pseudodiaptomidae
- Rhincalanidae
- Rostrocalanidae
- Ryocalanidae
- Scolecitrichidae
- Spinocalanidae
- Stephidae
- Sulcanidae
- Temoridae
- Tharybidae
- Tortanidae
Ecology
Calanoid copepods are the dominant animals in the plankton in many parts of the world's oceans, making up 55–95% of plankton samples.[2] They are therefore important in many food webs, taking in energy from phytoplankton and algae and 'repackaging' it for consumption by higher trophic level predators.[2] Many commercial fish are dependent on calanoid copepods for diet in either their larval or adult forms. Baleen whales such as bowhead whales, sei whales, right whales and fin whales rely substantially on calanoid copepods as a food source.[2]
References
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- ^ Page Module:Citation/CS1/styles.css has no content.J. W. Martin & G. E. Davis (2001). An Updated Classification of the Recent Crustacea (PDF). Natural History Museum of Los Angeles County. Archived from the original (PDF) on 8 September 2019.
- ^ a b c d e f Page Module:Citation/CS1/styles.css has no content.Mauchline, John (1998). "Introduction". The Biology of Calanoid Copepods. Advances in Marine Biology. Vol. 33. Elsevier. pp. 1–15. ISBN 978-0-12-105545-5.
- ^ Page Module:Citation/CS1/styles.css has no content.Barnes, Robert D. (1982). Invertebrate Zoology. Philadelphia, Pennsylvania: Holt-Saunders International. p. 692. ISBN 0-03-056747-5.
- ^ Page Module:Citation/CS1/styles.css has no content."WoRMS - World Register of Marine Species - Calanoida". www.marinespecies.org. Retrieved 8 December 2024.
External links
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- Calanoida fact sheet – guide to the marine zooplankton of south eastern Australia
- Classification of Calanoida
- Key to calanoid copepod families
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