Oncocerida
Sign in to saveThe Oncocerida comprise a diverse group of generally small nautiloid cephalopods known from the Middle Ordovician to the Mississippian (early Carboniferous; one possible member is known from the Early Permian), in which the connecting rings are thin and siphuncle segments are variably expanded (Flower, 1950). At present the order consists of some 16 families, a few of which, such as the Oncoceratidae, Brevicoceratidae, and Acleistoceratidae contain a fair number of genera each while others like the Trimeroceratidae and Archiacoceratidae are represented by only two or three (Sweet, 1964).
In the Vinony graph
Within Vinony's link graph, Oncocerida is referenced by 145 other articles, and connects out to Animalia, Mollusca and Wikidata.
Vinony files it under Middle Ordovician first appearances, Mississippian extinctions and Mollusc orders.
Its subject is documented across 4 Wikipedia language editions.
~5 min read
Encyclopedic overview
6 sectionsContents
- Physical characteristics
- Evolution and diversity
- Distribution and range
- Taxonomy
- Descendants
- References
The Oncocerida comprise a diverse group of generally small nautiloid cephalopods known from the Middle Ordovician to the Mississippian (early Carboniferous; one possible member is known from the Early Permian), in which the connecting rings are thin and siphuncle segments are variably expanded (Flower, 1950). At present the order consists of some 16 families, a few of which, such as the Oncoceratidae, Brevicoceratidae, and Acleistoceratidae contain a fair number of genera each while others like the Trimeroceratidae and Archiacoceratidae are represented by only two or three (Sweet, 1964).
thumb|Life reconstruction of Cyrtoceras sp
Excerpted from Wikipedia’s “Oncocerida” article, available under the CC BY-SA 4.0 licence.