Biology:Newmarracarroceras

From HandWiki
Short description: Genus of molluscs (fossil)

Newmarracarroceras
Temporal range: Bajocian[1]
Scientific classification e
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Cephalopoda
Subclass: Ammonoidea
Order: Ammonitida
Family: Sonniniidae
Subfamily: Witchelliinae
Genus: Newmarracarroceras
Species[2]
  • N. clarkei Crick, 1894
  • N. fairbridgei Arkell, 1954

Newmarracarroceras is an ammonite from the early middle Jurassic[1] with a ribbed subinvolute shell with a keel running along the venter, or outer rim. The umbilicus 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

  • Arkell, W.J.; Kummel, B.; Wright, C.W. (1957). Mesozoic Ammonoidea. Treatise on Invertebrate Paleontology, Part L, Mollusca 4. Lawrence, Kansas: Geological Society of America and University of Kansas Press. 

Wikidata ☰ Q7018606 entry