Newmarracarroceras

Newmarracarroceras
Temporal range: Bajocian[1]
↓
Scientific classification
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 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

  1. 1 2 Sepkoski, Jack (2002). "A compendium of fossil marine animal genera (Cephalopoda entry)". Bulletins of American Paleontology. 363: 1–560. Retrieved 2017-10-18.
  2. ↑ Paleobiology Database - Newmarracarroceras. 2017-10-19.
  • 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.


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