Decapodiformes
From Wikipedia, the free encyclopedia
| Decapodiformes | |
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| Juvenile cephalopod from plankton Antarctica |
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Scientific classification  |
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| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Cephalopoda |
| cohort: | Neocoleoidea |
| Superorder: | Decapodiformes Leach, 1817[1] |
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Decapodiformes is a superorder of Cephalopoda, which includes all species with ten limbs; the name derives from the Greek word meaning ten feet. The ten limbs are divided into 8 short arms and 2 long tentacles. It is presumed that an ancestral coleoid had five identical pairs of limbs, and that one branch evolved a modified arm pair IV and became the Decapodiformes species. Another branch evolved and then eventually lost its arm pair II, becoming the Octopodiformes.
The superorder of Decapodiformes includes:
- ?Order †Boletzkyida
- Order Spirulida: Ram's Horn Squid
- Order Sepiida: cuttlefish
- Order Sepiolida: pygmy, bobtail and bottletail squid
- Order Teuthida: squid
[edit] References
- ^ Young, R. E., Vecchione, M., Mangold, K. M. (2008). Decapodiformes Leach, 1817. Squids, cuttlefishes and their relatives. in The Tree of Life Web Project
[edit] Literature
- Young, Richard E.; Vecchione, Michael; Donovan, Desmond T. (1998). "The evolution of coleoid cephalopods and their present biodiversity and ecology". South African Journal of Marine Science 20 (1): 393–420. doi:10.2989/025776198784126287. abstract
[edit] External links
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