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- Proterocameroceratidae abstract "The Proterocameroceratidae were the first of the Endocerida. They began early in the Ordovician with Proendoceras or similar genus which had developed endocones, replacing the diaphragms of the ellesmerocerid ancestor. Proterocameroceratids are long, straight or gently curved with a generally narrow siphuncle along the ventral margin. Septal necks are short, never quite reaching the previous septum and may vary in length ontogenically within a species. Connecting rings are thick and layered. Endocones are simple, especially in early forms but may be complex with secondary structures in later forms. The Proterocameroceratidae gave rise to the Piloceratidae early on, and later to the Manchuroceratidae and Chihlioceratidae, from which the Allotrioceratidae are derived, and later yet possibly to the Emmonsoceratidae and Najaceratidae. The Piloceratidae in turn may have given rise to the Endoceratidae although a proterocameroceratid ancestor remains possible.Proterocameroceratids were probably mobile bottom predators that moved from place to place over the sea floor in search of prey or escape. Their shell was on one hand a carry over from some Cambrian monoplacophoran ancestor, passed on through previous orders, and on the other both a hydrodynamic facilitator and protection. But the shells of nautiloids, such as the proterocameroceratids was also an impediment to true squidy or fishy swimming. They could not have had fins for propulsion or steering, only the hyponome for spontaneous jet mobility and their tentacles by which to crawl across the sea floor and to grasp at things. The diagnostic endocones in the early part of the siphuncle balanced the weight of the animal living at the front of the shell. The Proterocameroceratidae ultimately suffered the extinction at the end of the Ordovician, but not before having given rise to a variety of endocerid families. They remain a subject of interesting research.".
- Proterocameroceratidae class Cephalopod.
- Proterocameroceratidae class Nautiloid.
- Proterocameroceratidae kingdom Animal.
- Proterocameroceratidae order Endocerida.
- Proterocameroceratidae phylum Mollusca.
- Proterocameroceratidae thumbnail Cameroceras_trentonese.jpg?width=300.
- Proterocameroceratidae wikiPageID "14345700".
- Proterocameroceratidae wikiPageRevisionID "478496253".
- Proterocameroceratidae classis "Cephalopoda".
- Proterocameroceratidae familia "Proterocameroceratidae".
- Proterocameroceratidae fossilRange Ordovician.
- Proterocameroceratidae hasPhotoCollection Proterocameroceratidae.
- Proterocameroceratidae name "Proterocameroceratidae".
- Proterocameroceratidae ordo Endocerida.
- Proterocameroceratidae phylum Mollusca.
- Proterocameroceratidae regnum "Animalia".
- Proterocameroceratidae subclassis "Nautiloidea".
- Proterocameroceratidae subdivisionRanks "genus".
- Proterocameroceratidae subject Category:Nautiloids.
- Proterocameroceratidae subject Category:Ordovician_animals.
- Proterocameroceratidae subject Category:Prehistoric_cephalopods.
- Proterocameroceratidae type Animal100015388.
- Proterocameroceratidae type Cephalopod101968315.
- Proterocameroceratidae type Invertebrate101905661.
- Proterocameroceratidae type LivingThing100004258.
- Proterocameroceratidae type Mollusk101940736.
- Proterocameroceratidae type Object100002684.
- Proterocameroceratidae type OrdovicianAnimals.
- Proterocameroceratidae type Organism100004475.
- Proterocameroceratidae type PhysicalEntity100001930.
- Proterocameroceratidae type PrehistoricCephalopods.
- Proterocameroceratidae type Whole100003553.
- Proterocameroceratidae type Animal.
- Proterocameroceratidae type Eukaryote.
- Proterocameroceratidae type Mollusca.
- Proterocameroceratidae type Species.
- Proterocameroceratidae type Mollusk.
- Proterocameroceratidae type Organism.
- Proterocameroceratidae comment "The Proterocameroceratidae were the first of the Endocerida. They began early in the Ordovician with Proendoceras or similar genus which had developed endocones, replacing the diaphragms of the ellesmerocerid ancestor. Proterocameroceratids are long, straight or gently curved with a generally narrow siphuncle along the ventral margin. Septal necks are short, never quite reaching the previous septum and may vary in length ontogenically within a species. Connecting rings are thick and layered.".
- Proterocameroceratidae label "Proterocameroceratidae".
- Proterocameroceratidae sameAs m.03d15yq.
- Proterocameroceratidae sameAs Q7251560.
- Proterocameroceratidae sameAs Q7251560.
- Proterocameroceratidae sameAs Proterocameroceratidae.
- Proterocameroceratidae wasDerivedFrom Proterocameroceratidae?oldid=478496253.
- Proterocameroceratidae depiction Cameroceras_trentonese.jpg.
- Proterocameroceratidae isPrimaryTopicOf Proterocameroceratidae.
- Proterocameroceratidae name "Proterocameroceratidae".