Octopodiformes

Life-forms

Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Cladus: Protostomia
Cladus: Spiralia
Cladus: Lophotrochozoa
Phylum: Mollusca
Classis: Cephalopoda
Subclassis: Coleoidea
Cohors: Neocoleoidea
SuperOrdo: Octopodiformes
Ordines (2): Vampyromorphida - Octopoda
Vernacular names
suomi: Kahdeksanlonkeroiset mustekalat

Octopodiformes is a superorder of the subclass Coleoidea, comprising the octopuses and the vampire squid. All living members of Octopodiformes have eight arms, either lacking the two tentacles of squid (as is the case in octopuses) or modifying the tentacles into thin filaments (as in vampire squid). Octopodiformes is often considered the crown group of octopuses and vampire squids, including all descendants of their common ancestor. Some authors use the term Vampyropoda for the same general category, though others use "Vampyropoda" to refer to the total group (all cephalopods closer to octopods than to true squid). Another term is Octobranchia, referring to cephalopods without prominent tentacles.[4]

It is considered one of the two extant groups of the Neocoleoidea.[2]

Pohlsepia, originally described as earliest octopod is considered as dubious for this group in later study.[1][4] Syllipsimopodi, a squid-like cephalopod from the Mississippian-age Bear Gulch Lagerstätte of Montana, was originally described as the oldest unambiguous vampyropod.[4] However, further analyses might be necessary to unequivocally assign this cephalopod to Vampyropoda.[5][6]

Syllipsimopodi has a combination of squid-like features (like 10 arms) and octopod-like features (like biserial suckers and a simplified internal shell).[4]
Classification

Class Cephalopoda

• Subclass Nautiloidea: nautilus
• Subclass †Ammonoidea: ammonites
• Subclass Coleoidea
  • Superorder Decapodiformes: squid, cuttlefish
  • Clade Vampyropoda
    • Genus †Syllipsimopodi^[4]
    • Genus †Proteroctopus
    • Superorder Octopodiformes / Octobranchia
      • Family †Trachyteuthididae (incertae sedis)
      • Order Vampyromorphida: vampire squid
      • Clade: Muensterelloidea
        • Family: †Muensterellidae
        • Family: †Patelloctopodidae
        • 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
            • Family Opisthoteuthidae: umbrella octopus
            • Family Cirroteuthidae
            • Family Stauroteuthidae
          • Suborder Incirrina
            • Superfamily Octopodoidea^[7]
              • Family Amphitretidae^[8]
                • subfamily Amphitretinae: telescope octopus
                • subfamily Bolitaeninae: gelatinous octopus
                • subfamily Vitreledonellinae
              • Family Bathypolypodidae
              • Family Eledonidae
              • Family Enteroctopodidae
              • Family Megaleledonidae
              • Family Bolitaenidae: gelatinous octopus
              • Family Octopodidae: benthic octopus
            • Superfamily Argonautoidea
              • Family Alloposidae: seven-arm octopus
              • Family Argonautidae: argonauts
              • Family Ocythoidae: tuberculate pelagic octopus
              • Family Tremoctopodidae: blanket octopus

References

Klug, Christian; Landman, Neil H.; Fuchs, Dirk; Mapes, Royal H.; Pohle, Alexander; Guériau, Pierre; Reguer, Solenn; Hoffmann, René (2019-07-31). "Anatomy and evolution of the first Coleoidea in the Carboniferous". Communications Biology. 2 (1): 280. doi:10.1038/s42003-019-0523-2. ISSN 2399-3642. PMC 6668408. PMID 31372519.
Fuchs, D.; Von Boletzky, S.; Tischlinger, H. (2010). "New evidence of functional suckers in belemnoid coleoids (Cephalopoda) weakens support for the 'Neocoleoidea' concept". Journal of Molluscan Studies. 76 (4): 404–406. doi:10.1093/mollus/eyq032.
Young, Richard E.; Vecchione, Michael; Fuchs, Dirk (May 3, 2010). "Octopodiformes Berthold and Engeser, 1987. Vampire Squid and Octopods". Tree of Life Web Project. Retrieved Jun 2, 2010.
Whalen, Christopher D.; Landman, Neil H. (2022-03-08). "Fossil coleoid cephalopod from the Mississippian Bear Gulch Lagerstätte sheds light on early vampyropod evolution". Nature Communications. 13 (1): 1107. Bibcode:2022NatCo..13.1107W. doi:10.1038/s41467-022-28333-5. ISSN 2041-1723. PMC 8904582. PMID 35260548. S2CID 247317831.
Klug, C.; Stevens, K.; Hoffmann, R.; Zatoń, M.; Clements, T.; Košťák, M.; Weis, R.; De Baets, K.; Lehmann, J.; Vinther, J.; Fuchs, D. (2023). "Revisiting the identification of Syllipsimopodi bideni and timing of the decabrachian-octobrachian divergence". Nature Communications. 14 (1). 8094. doi:10.1038/s41467-023-42842-x. PMC 10703834. PMID 38062003.
Whalen, C. D.; Landman, N. H. (2023). "Reply to: Revisiting the identification of Syllipsimopodi bideni and timing of the decabrachian-octobrachian divergence". Nature Communications. 14 (1). 8228. doi:10.1038/s41467-023-42843-w. PMC 10716472. PMID 38086818.
"WoRMS - World Register of Marine Species - Octopodoidea d'Orbigny, 1840". www.marinespecies.org. Retrieved 2023-04-20.
"WoRMS - World Register of Marine Species - Amphitretidae Hoyle, 1886". www.marinespecies.org. Retrieved 2023-04-20.

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