Laumontoceras
Laumonttoceras is a genus in oncocerid family Jovellaniidae from the lower Devonian of Europe characterized by uncompressed, moderately expanding, orthocones with a central siphuncle composed of cylindrical segments that are slightly contracted at the septal openings and which contain discrete, discontinuous actinosphonate deposits.
| Laumontoceras | |
|---|---|
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Cephalopoda |
| Subclass: | Nautiloidea |
| Order: | †Oncocerida |
| Family: | †Jovellaniidae |
| Genus: | †Laumontoceras Foerste, 1926 |
Laumontoceras differs from Jovellania, also from the lower Devonian of Europe, primarily in having a central rather than a subventral siphuncle, as in Jovellania.
References
- Sweet, W. C. 1964. Nautiloidea- Orthocerida. Treatise on Invertebrate Paleontology, Part K. Geol Soc of America and Univ of Kansas Press. Teichert & Moore, (eds)
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