Cirrina

From Biocrawler, the free encyclopedia.

Cirrina
Scientific classification
Kingdom: Animalia Phylum: Mollusca Class: Cephalopoda Subclass: Coleoidea Superorder: Octopodiformes Order: Octopoda Suborder: Cirrina
Families
14 in two suborders, see text.

Cirrina is a suborder of the order Octopoda. Most lay people are unaware of this order and even biologists do not know much about it. Cirrina octopuses have a small, internal shell and two fins on their head, while their sister suborder, the Incirrina has neither.

The suborder is named for small cilia-like strands on the arms of the octopus. There is a pair of cirri for each sucker. These are thought to play some role in feeding, perhaps by creating currents of water that help bring food closer to the beak.

Classification

• CLASS CEPHALOPODA
  • Subclass Nautiloidea: nautilus
  • Subclass Coleoidea
    • Superorder Decapodiformes: squid, cuttlefish
    • Superorder Octopodiformes
      • Order Vampyromorphida: Vampire Squid
      • Order Octopoda
        • Suborder Cirrina: finned deep-sea octopus
          • Family Cirroteuthidae
          • Family Grimpoteuthididae
          • Family Luteuthididae: Lu's Jellyhead
          • Family Opisthoteuthidae: umbrella octopus
          • Family Stauroteuthidae
        • Suborder Incirrina

Wikipedia (http://en.wikipedia.org/wiki/Main_Page) Cirrina (http://en.wikipedia.org/wiki/Cirrina) version history (http://en.wikipedia.org/w/index.php?title=Cirrina&action=history) GNU Free Documentation Lizenz (http://en.wikipedia.org/wiki/Wikipedia:Text_of_the_GNU_Free_Documentation_License) CC-by-sa (http://creativecommons.org/licenses/by-sa/2.5/)

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