Proteoceratidae
Classification
Phylum: Mollusca
Class: Cephalopoda
Order: Orthocerida
Family: Proteoceratidae (Flower, 1962)
Cincinnatian Genera: Orthonybyoceras, Treptoceras
Geologic Range
Middle Ordovician – Middle Silurian
Common Paleoecology
Proteoceratidae is an extinct family of nektonic carnivores
Description of the Family
- Orthocones smooth or annulated,
- Expanded cyrtochoanitic siphuncular segments in early stages and narrower, subcylindrical, orthochoanitic segments in late stages
- Cameral deposits well developed
- Siphuncular deposits exist in the form of annuli, developing into parietal deposits either growing forward, or backwards
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Treatise on Invertebrate Paleontology, Part K (1964):
Treatise on Invertebrate Paleontology, Part K (1964):
- Smooth or annulated orthocones and exogastric cyrocones with expanded cyrtochoanitic siphuncular segments in early stages and narrower, subcylindrical, orthochoanitic segments in late stages. Siphuncular deposits consist of annuli that develop into parietal deposits by growth forward, backward, or in both directions, from septal foramen. Cameral deposits well developed in most genera.
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Orthonybyoceras
Treptoceras
