Eophyllites

Eophyllites
Temporal range: Early Triassic (Scythian)
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Cephalopoda
Order: Ammonitida
Family: Ussuritidae
Genus: Eophyllites
Spath, 1930

Eophyllites is an ammonoid cephalopod from the Lower Triassic and a predecessor of genera like Monophyllites and Ussurites.

The shell of Eophyllites is evolute, discoidal; whorls compressed, deeply embracing; flanks gently convex, converging on a narrowly rounded venter. Sutures basically ceratitic; ventral lobe wide, divided by a high siphonal saddle; Lobesjagged, 1st lateral larger than the second; saddles monophyllic, smooth and rounded.

Related Paleophylites from the same age is ribbed on the outer flanks and lobes in the suture are more terminally digitate.

References

This article is issued from Wikipedia - version of the Thursday, March 10, 2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.