Burenoceras
| Burenoceras Temporal range: L Ordovician | |
|---|---|
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Cephalopoda |
| Subclass: | Nautiloidea |
| Order: | Ellesmerocerida |
| Family: | Ellesmeroceratidae |
| Genus: | Burenoceras Ulrich & Foeste, 1931 |
Burenoceras is a genus of small, even tiny, Gasconadian cyrtoconic ellesmeroceratids in which the phragmocone -the chambered portion- is shorter that the living chamber.
In general form, Burenoceras is similar to Levisoceras, but much smaller. Two species, B. phragmoceroides and B. percompressum with contracted, slit-like apertures, are miniature forms resembling the much larger homeomorphic Silurian discosorid Phragmoceras and Devonian oncocerid Bolloceras. Other Burenoceras have apertures that are variable straight sided or flaring.
Burenoceras is among what are referred to as microellesmeroceroids.
references
- 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 article is issued from Wikipedia - version of the Monday, September 14, 2015. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.