This article may be too technical for most readers to understand. (February 2014) |
This article includes a list of references, related reading, or external links, but its sources remain unclear because it lacks inline citations. (July 2022) |
Dakeoceras is a genus of simple cyrtoconic ellesmeroceratid cephalopods in the fossil record. All known species come from the Lower Canadian epoch (Gasconadian) of North America.
| Dakeoceras Temporal range: L Ordovician
| |
|---|---|
| Scientific classification | |
| Kingdom: | |
| Phylum: | |
| Class: | |
| Subclass: | |
| Order: | |
| Family: | |
| Genus: | Dakeoceras Ulrich & Furnish, 1931
|
The Dakeoceras shell is an endogastric cyrtocone with the siphuncle on the concave, ventral, side; moderately curved and expanded in the juvenile stages which become reduced in the adult.
Forms in which the cross section is broadened, with the venter becoming flattened, are separated as Paradakeoceras. Quebecoceras is also similar but for its circular cross section and more persistent rate of expansion and curvature. Levisoceras is more compressed, more strongly curved, and has a higher rate of expansion especially in the vertical plane.
External links edit
- Flower, R.H. 1964. The Nautiloid Order Ellesmerocerida (Cephalopoda); Memoir 12, New Mexico Bureau of Mines and Mineral Resources, Socorro N.M.
- W. M. Furnish & Brian F. Glenister, 1964. Nautiloidia—Ellesmerocerida. Treatise on Invertebrate Paleontology, Part K. Geological Society of America, Teichert and Moore (eds).
 | This prehistoric nautiloid-related article is a stub. You can help Wikipedia by expanding it. |