? Coleoids
Juvenile cephalopod from plankton Antarctica
Scientific classification
Kingdom: Animalia Phylum: Mollusca Class: Cephalopoda Subclass: Coleoidea Bather, 1888
Orders
Aulacocerida (extinct) Hematitida  (extinct) Phragmoteuthida  (extinct) Belemnitida  (extinct) Sepiida Sepiolida Spirulida Teuthida Octopoda Vampyromorphida squid juvenile from plankton - photo Uwe Kils GFDL. larger images via http://www. ... This article or section does not cite its references or sources. ... Scientific classification or biological classification is how biologists group and categorize extinct and living species of organisms (as opposed to folk taxonomy). ... Phyla Animals are a major group of organisms, classified as the kingdom Animalia or Meta­zoa. ... Classes Caudofoveata Aplacophora Polyplacophora Monoplacophora Bivalvia Scaphopoda Gastropoda Cephalopoda † Rostroconchia The mollusks or molluscs are the large and diverse phylum Mollusca, which includes a variety of familiar creatures well-known for their decorative shells or as seafood. ... Orders Subclass Nautiloidea †Plectronocerida †Ellesmerocerida †Actinocerida †Pseudorthocerida †Endocerida †Tarphycerida †Oncocerida †Discosorida Nautilida †Orthocerida †Ascocerida †Bactritida Subclass †Ammonoidea †Goniatitida †Ceratitida †Ammonitida Subclass Coleoidea †Belemnoidea †Aulacocerida †Belemnitida †Hematitida †Phragmoteuthida Neocoleoidea (most living cephalopods) Sepiida Sepiolida Spirulida Teuthida Octopoda Vampyromorphida The cephalopods (head-foot) are the mollusk class Cephalopoda characterized by bilateral body... 1888 (MDCCCLXXXVIII) is a leap year starting on Sunday (click on link for calendar) of the Gregorian calendar or a leap year starting on Tuesday of the Julian calendar. ... Scientific classification or biological classification refers to how biologists group and categorize extinct and living species of organisms. ... Families Sepiadariidae Sepiidae Cuttlefish are animals of the order Sepiida, and are marine cephalopods, small relatives of squids and nautilus. ... Families Idiosepiidae Sepiolidae Classification CLASS CEPHALOPODA Subclass Nautiloidea: nautilus Subclass Coleoidea: squid, octopus, cuttlefish Superorder Decapodiformes Order Spirulida: Rams Horn Squid Order Sepiida: cuttlefish Order Sepiolida: bobtail squid Family Idiosepiidae Family Sepiolidae Order Teuthida: squid Superorder Octopodiformes Categories: Animal stubs | Bobtail squid ... Binomial name Spirula spirula (Linnaeus, 1758) Rams Horn Squid (Spirula spirula) is a unique and peculiar species of mollusc which constitutes a family (Spirulidae) and order (Spirulida) by itself. ... Suborders Myopsina Oegopsina Squids are the large, diverse group of marine mollusks, popular as food in cuisines as widely separated as the Japanese and the Italian. ... Families 14 in two suborders, see text The octopus is a cephalopod of the order Octopoda that inhabits many diverse regions of the ocean, especially coral reefs. ... Binomial name Vampyroteuthis infernalis Chun, 1903 The Vampire Squid (Vampyroteuthis infernalis, lit. ...

Subclass Coleoidea is the grouping of cephalopods containing all the primarily soft-bodied creatures. Unlike its sister group the Nautiloidea, which has a rigid outer shell for protection, the coleoids have at most an internal bone or shell that is used for buoyancy or support. Some species have lost their bone altogether, while in some it has been replaced by a cartilaginous support structure. In biology, a subclass is one level below a class. ... Orders Subclass Nautiloidea †Plectronocerida †Ellesmerocerida †Actinocerida †Pseudorthocerida †Endocerida †Tarphycerida †Oncocerida †Discosorida Nautilida †Orthocerida †Ascocerida †Bactritida Subclass †Ammonoidea †Goniatitida †Ceratitida †Ammonitida Subclass Coleoidea †Belemnoidea †Aulacocerida †Belemnitida †Hematitida †Phragmoteuthida Neocoleoidea (most living cephalopods) Sepiida Sepiolida Spirulida Teuthida Octopoda Vampyromorphida The cephalopods (head-foot) are the mollusk class Cephalopoda characterized by bilateral body... Orders Nautilida Bactrida Nautiloids are a group of marine animals which all possess an external shell, the most well known example being the modern nautiluses. ... Cartilage is a type of dense connective tissue. ...

The major dividings of Coleoidea are based upon the number of arms or tentacles and their structure. The extinct and most primitive form, the Belemnoidea, presumably had ten equally sized arms, in five pairs numbered ventral to dorsal as I, II, III, IV and V. More modern species either modified or lost a pair of arms. The superorder Decapodiformes has arm pair IV modified into long tentacles with suckers generally only on the club-shaped distal end. Superorder Octopodiformes has modifications to arm pair II; it is significantly reduced and used only as a sensory filament in the Vampyromorphida, while Octopoda species have totally lost that arm pair. Extinct Orders Aulacocerida Phragmoteuthida Belemnitida Diplobelida Belemnoteuthina Belemnites (or belemnoids) are an extinct group of marine cephalopod, very similar in many ways to the modern squid and closely related to the modern cuttlefish. ... In zootomy, several terms are used to describe the location of organs and other structures in the body of bilateral animals. ... The word dorsal can refer to many different things. ... Scientific classification or biological classification refers to how biologists group and categorize extinct and living species of organisms. ... Orders Sepiida Sepiolida Spirulida Teuthida Decapodiformes is a superorder of Cephalopoda, which includes all species with ten limbs; the name derives from the Latin meaning ten feet. ... In zootomy, several terms are used to describe the location of organs and other structures in the body of bilateral animals. ... Binomial name Vampyroteuthis infernalis Chun, 1903 The Vampire Squid (Vampyroteuthis infernalis, lit. ... Families 14 in two suborders, see text The octopus is a cephalopod of the order Octopoda that inhabits many diverse regions of the ocean, especially coral reefs. ...

Classification

• CLASS CEPHALOPODA
  • Subclass Nautiloidea: nautilus
  • Subclass Coleoidea
    • Division Belemnoidea: extinct belemnoids
      • Order Aulacocerida
      • Order Hematitida
      • Order Phragmoteuthida
      • Order Belemnitida
    • Division Neocoleoidea
      • Superorder Decapodiformes
        • Order Spirulida: Ram's Horn Squid
        • Order Sepiida: cuttlefish
        • Order Sepiolida: bobtail squid
        • Order Teuthida: squid
      • Superorder Octopodiformes
        • Order Vampyromorphida: Vampire Squid
        • Order Octopoda: octopus

Orders Subclass Nautiloidea †Plectronocerida †Ellesmerocerida †Actinocerida †Pseudorthocerida †Endocerida †Tarphycerida †Oncocerida †Discosorida Nautilida †Orthocerida †Ascocerida †Bactritida Subclass †Ammonoidea †Goniatitida †Ceratitida †Ammonitida Subclass Coleoidea †Belemnoidea †Aulacocerida †Belemnitida †Hematitida †Phragmoteuthida Neocoleoidea (most living cephalopods) Sepiida Sepiolida Spirulida Teuthida Octopoda Vampyromorphida The cephalopods (head-foot) are the mollusk class Cephalopoda characterized by bilateral body... Orders Nautilida Bactrida Nautiloids are a group of marine animals which all possess an external shell, the most well known example being the modern nautiluses. ... Extinct Orders Aulacocerida Phragmoteuthida Belemnitida Diplobelida Belemnoteuthina Belemnites (or belemnoids) are an extinct group of marine cephalopod, very similar in many ways to the modern squid and closely related to the modern cuttlefish. ... Orders Sepiida Sepiolida Spirulida Teuthida Decapodiformes is a superorder of Cephalopoda, which includes all species with ten limbs; the name derives from the Latin meaning ten feet. ... Binomial name Spirula spirula (Linnaeus, 1758) Rams Horn Squid (Spirula spirula) is a unique and peculiar species of mollusc which constitutes a family (Spirulidae) and order (Spirulida) by itself. ... Families Sepiadariidae Sepiidae Cuttlefish are animals of the order Sepiida, and are marine cephalopods, small relatives of squids and nautilus. ... Families Idiosepiidae Sepiolidae Classification CLASS CEPHALOPODA Subclass Nautiloidea: nautilus Subclass Coleoidea: squid, octopus, cuttlefish Superorder Decapodiformes Order Spirulida: Rams Horn Squid Order Sepiida: cuttlefish Order Sepiolida: bobtail squid Family Idiosepiidae Family Sepiolidae Order Teuthida: squid Superorder Octopodiformes Categories: Animal stubs | Bobtail squid ... Suborders Myopsina Oegopsina Squids are the large, diverse group of marine mollusks, popular as food in cuisines as widely separated as the Japanese and the Italian. ... Binomial name Vampyroteuthis infernalis Chun, 1903 The Vampire Squid (Vampyroteuthis infernalis, lit. ... Families 14 in two suborders, see text The octopus is a cephalopod of the order Octopoda that inhabits many diverse regions of the ocean, especially coral reefs. ...

External link

• CephBase: Coleoidea
• TONMO.com Belemnites article
• http://tolweb.org/tree?group=Coleoidea