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 Edit this 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

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