Zaraiskites

Zaraiskites is an extinct genus of ammonoid cephalopod that lived during the Tithonian.

Zaraiskites
Temporal range:
Scientific classification
Kingdom:
Animalia
Phylum:
Mollusca
Class:
Cephalopoda
Subclass:
Ammonoidea
Order:
Ammonitida
Family:
Perisphinctidae
Subfamily:
Virgatitinae
Genus:
Zaraiskites

Semenov, 1898

Zaraiskites has a ribbed evolute shell without tubercles. Inner whorls are with normal bifurcate or triplicate ribbing; outer whorl is with virgatotome ribbing with as many as seven secondary ribs taking off successively in front of each primary rib.

Related genera in the Virgatitinae include Acuticostites and Virgatites

Distribution

Only found at Kuibyshev Reservoir, Volga River, Russia.[2]

References
Notes
  1. Sepkoski, Jack (2002). "A compendium of fossil marine animal genera (Cephalopoda entry)". Bulletins of American Paleontology. 363: 1–560. Archived from the original on 2016-02-25. Retrieved 2017-10-18.
  2. "Paleobiology Database - Zaraiskites". Retrieved 2017-10-19.
Bibliography
  • W.J Arkell, et al., Mesozoic Ammonoidea; Treatise on Invertebrate Paleontology, Part L, 1957. Geological Society of America and University of Kansas Press.
  • V.V. Mitta, 1993. The Systematic Composition of the Middle Volgian Virgatitidae (Ammonoidea) of Central Asia. Paleontological Journal 27(4).


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