Incirrata

Incirrata
	An octopus active during the night in the coastal waters of northern East Timor
	An unidentified octopus observed on East Scotia Ridge at a depth of 2,394 m; (scale bar: 10 cm)
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Cephalopoda
Order:	Octopoda
Suborder:	Incirrata; Grimpe, 1916
Families
	Superfamily Octopodoidea Amphitretidae; Bolitaenidae; Octopodidae; Vitreledonellidae; ; Superfamily Argonautoidea Alloposidae; Argonautidae; Ocythoidae; Tremoctopodidae; ;
Synonyms
	Incirrina;

Incirrata (or Incirrina) is a suborder of the order Octopoda. The suborder contains the classic "benthic octopuses," as well as many pelagic octopus families, including the paper nautiluses. The incirrate octopuses are distinguished from the cirrate octopuses by the absence in the former of the "cirri" filaments (found with the suckers) for which the cirrates are named, as well as by the lack of paired swimming fins on the head, and lack of a small internal shell (the "shell" of Argonauta species is not a true shell, but a thin calcite egg case).

Classification

CLASS CEPHALOPODA
- Subclass Nautiloidea: nautilus
- Subclass †Ammonoidea: ammonites
- Subclass Coleoidea
  - Superorder Decapodiformes: squid, cuttlefish
  - Superorder Octopodiformes
    - Family †Trachyteuthididae (incertae sedis)
    - Order Vampyromorphida: vampire squid
    - Order Octopoda
      - Genus †Keuppia (incertae sedis)
      - Genus †Palaeoctopus (incertae sedis)
      - Genus †Paleocirroteuthis (incertae sedis)
      - Genus †Proteroctopus (incertae sedis)
      - Genus †Styletoctopus (incertae sedis)
      - Suborder Cirrina: finned deep-sea octopus
      - Suborder Incirrata
        Superfamily Octopodoidea
        Family Amphitretidae
        subfamily Amphitretinae
        
        subfamily Bolitaeninae
        
        subfamily Vitreledonellinae
        
        Family Bathypolypodidae
        
        Family Eledonidae
        
        Family Enteroctopodidae
        
        Family Megaleledonidae
        
        Family Octopodidae
        
        Superfamily Argonautoidea
        Family Alloposidae: seven-arm octopus
        
        Family Argonautidae: argonauts
        
        Family Ocythoidae: tuberculate pelagic octopus
        
        Family Tremoctopodidae: blanket octopus

Note: A new unnamed white species was discovered February 26, 2016 by NOAA’s Deep Discoverer about 2.5 miles below the ocean surface near the Hawaiian Archipelago.^[2]

References

^ Rogers, A. D.; Tyler, P. A.; Connelly, D. P.; Copley, J. T.; James, R.; Larter, R. D.; Linse, K.; Mills, R. A.; Garabato, A. N.; Pancost, R. D.; Pearce, D. A.; Polunin, N. V.; German, C. R.; Shank, T.; Boersch-Supan, P. H.; Alker, B. J.; Aquilina, A.; Bennett, S. A.; Clarke, A.; Dinley, R. J.; Graham, A. G.; Green, D. R.; Hawkes, J. A.; Hepburn, L.; Hilario, A.; Huvenne, V. A.; Marsh, L.; Ramirez-Llodra, E.; Reid, W. D.; Roterman, C. N. (2012). Eisen, Jonathan A. (ed.). "The discovery of new deep-sea hydrothermal vent communities in the Southern Ocean and implications for biogeography". PLOS Biology. 10 (1): e1001234. doi:10.1371/journal.pbio.1001234. PMC 3250512. PMID 22235194.
^ "Ghost octopod shows how little we know about deep-sea life". Smithsonian Science News -. 8 March 2016. Retrieved 2016-03-09.

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[1] Rogers, A. D.; Tyler, P. A.; Connelly, D. P.; Copley, J. T.; James, R.; Larter, R. D.; Linse, K.; Mills, R. A.; Garabato, A. N.; Pancost, R. D.; Pearce, D. A.; Polunin, N. V.; German, C. R.; Shank, T.; Boersch-Supan, P. H.; Alker, B. J.; Aquilina, A.; Bennett, S. A.; Clarke, A.; Dinley, R. J.; Graham, A. G.; Green, D. R.; Hawkes, J. A.; Hepburn, L.; Hilario, A.; Huvenne, V. A.; Marsh, L.; Ramirez-Llodra, E.; Reid, W. D.; Roterman, C. N. (2012). Eisen, Jonathan A. (ed.). "The discovery of new deep-sea hydrothermal vent communities in the Southern Ocean and implications for biogeography". PLOS Biology. 10 (1): e1001234. doi:10.1371/journal.pbio.1001234. PMC 3250512. PMID 22235194.

[2] "Ghost octopod shows how little we know about deep-sea life". Smithsonian Science News -. 8 March 2016. Retrieved 2016-03-09.

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