Proteroctopus ribeti was a primitive octopod that lived in the Middle Jurassic, approximately 164 million years ago. The single fossil specimen assigned to this species originates from the Lower Callovian of Voulte-sur-Rhône in France. It is currently on display at the Musée de Paléontologie de La Voulte-sur-Rhône.[1] The Callovian is a stage on the geologic time scale occuring from 164. ... The conservation status of a species is an indicator of the likelihood of that species continuing to survive either in the present day or the future. ... Three small ammonite fossils, each approximately 1. ... Scientific classification or biological classification is a method by which biologists group and categorize species of organisms. ... Digimon, the only known animals. ... 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 (Greek plural (kephalópoda); head-foot) are the mollusk class Cephalopoda... Orders Aulacocerida (extinct) Hematitida (extinct) Phragmoteuthida (extinct) Belemnitida (extinct) Sepiida Sepiolida Spirulida Teuthida Octopoda Vampyromorphida Subclass Coleoidea is the grouping of cephalopods containing all the primarily soft-bodied creatures. ... Orders Vampyromorphida Octopoda Octopodiformes is a superorder of the subclass Coleoidea. ... 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. ... Incertae sedis—of uncertain position (seat)—is a term used to define a taxonomic group where its broader relationships are unknown or undefined. ... In biology, binomial nomenclature is the formal method of naming species. ... Suborders †Pohlsepia (incertae sedis) †Proteroctopus (incertae sedis) †Palaeoctopus (incertae sedis) Cirrina Incirrina Synonyms Octopoida Leach, 1817 The octopus (Greek , eight-legs) is a cephalopod of the order Octopoda that inhabits many diverse regions of the ocean, especially coral reefs. ... The Middle Jurassic, called the Dogger in the European system of classification, is the second epoch of the Jurassic period. ... The Callovian is a stage on the geologic time scale occuring from 164. ...
The morphology of P. ribeti suggests a necto-epipelagic mode of life.[1] Diagram of the layers of the pelagic zone. ...
^ ab Fischer, J.C. & B. Riou 1982. Le plus ancien octopode connu (Cephalopoda, Dibranchiata): Proteroctopus ribeti nov. gen., nov. sp., du Callovien de l'ArdeÁche (France). Comptes Rendus de l'AcadeÂmie des Sciences de Paris, Serie II295: 277–280.
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