Homoadelphoceras

Homoadelphoceras is a genus of gyroconic rutoceratid Nautiloid from the Middle Devonian of central Europe. Whorls not in contact, venter and dorsum, (outer and inner rims), broadly rounded. Dorso-lateral and ventro-lateral flanks more or less flat, meet at an angle.

Homoadelphoceras
Temporal range: Middle Devonian
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Cephalopoda
Subclass: Nautiloidea
Order: Nautilida
Family: Rutoceratidae
Genus: Homoadelphoceras
Foerste, 1926

Homoadelphoceras resembles Adelphoceras which differs in that its whorls are in contact, producing an impressed zone on the inner rim, or dorsum.

Both are close to their oncocerid ancestors in that their siphuncles contain laminar actinosiphonate deposits.

References


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