Tetrabelus

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Tetrabelus
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Cephalopoda
(unranked): Belemnoidea
Genus:Tetrabelus

Tetrabelus is a genus of belemnite, an extinct group of cephalopods. [1]

A genus is a taxonomic rank used in the biological classification of living and fossil organisms, as well as viruses, in biology. In the hierarchy of biological classification, genus comes above species and below family. In binomial nomenclature, the genus name forms the first part of the binomial species name for each species within the genus.

Cephalopod class of molluscs

A cephalopod is any member of the molluscan class Cephalopoda such as a squid, octopus or nautilus. These exclusively marine animals are characterized by bilateral body symmetry, a prominent head, and a set of arms or tentacles modified from the primitive molluscan foot. Fishermen sometimes call them inkfish, referring to their common ability to squirt ink. The study of cephalopods is a branch of malacology known as teuthology.

See also

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References

  1. ↑ Sepkoski, Jack (2002). "A compendium of fossil marine animal genera (Cephalopoda entry)". Bulletins of American Paleontology. 364: 560. Retrieved 2009-04-10.


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