Narthecoceratidae is an extinct family of orthocone cephalopods who lived in marine environments in what is now North America during the Ordovician from 460.5—449 mya, existing for approximately 11.5 million years.[1]

Narthecoceratidae
Temporal range: Ordovician 460.5–449 Ma
Artist's depiction of Narthecoceras
Scientific classification
Kingdom:
Phylum:
Class:
Subclass:
Order:
Family:
Narthecoceratidae

Taxonomy

edit

Narthecoceratidae was named by Flower (1958). It was assigned to Endocerida by Teichert et al. (1964); and reassigned to Orthocerida by Frey (1981).[2][3]

Morphology

edit

The shell is usually long, and may be straight ("orthoconic") or gently curved. In life, these animals may have been similar to the modern squid, except for the long shell.

Fossil distribution

edit

Fossil distribution includes Ohio, Franklin District, Canada, and Manitoba, Canada.

References

edit
  1. ^ PaleoBiology Database: Narthecoceratidae, basic info
  2. ^ C. Teichert, B. Kummel, W.C. Sweet, H.B. Stenzel, W.M. Furnish, B.F. Glenister, H.K. Erben, R.C. Moore, and D.E. Nodine Zeller. 1964. Cephalopoda - general features - Endoceratoidea - Actinoceratoidea - Nautiloidea - Bactritoidea. Treatise on Invertebrate Paleontology K(3):1-519
  3. ^ R. C. Frey. 1981. Narthecoceras (Cephalopoda) from the Upper Ordovician (Richmondian) of Southwest Ohio. Journal of Paleontology 55(6):1217-1224