Kingdom Animalia Class Cephalopoda Order Ammonitida Rank Genus | Phylum Mollusca Subclass Ammonoidea Family Sonniniidae | |
Newmarracarroceras is an ammonite from the early middle Jurassic with a ribbed subinvolute shell with a keel running along the venter, or outer rim. The ubilicus is moderately wide, exposing the inner whorls exposed in part.
Newmarracarroceras has a fairly wide geographic range and includes species previously described under Fontannesia. Related genera include Asthenoceras, Fontannesia, Guhsania, and Witchellia.
References
Newmarracarroceras Wikipedia(Text) CC BY-SA