Biology:Barroisiceras

From HandWiki
Revision as of 21:38, 13 October 2021 by imported>S.Timg (over-write)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Short description: Genus of molluscs (fossil)

Barroisiceras
Temporal range: Coniacian[1]
Collignoniceratidae - Barroisiceras species.JPG
Fossil of Barroisiceras species. Coniacian of Madagascar
Scientific classification e
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Cephalopoda
Subclass: Ammonoidea
Order: Ammonitida
Family: Collignoniceratidae
Subfamily: Barroisiceratinae
Genus: Barroisiceras
de Grossouvre, 1894
Subgenera
  • Barroisiceras (Alstadenites)
  • Barroisiceras (Barroisiceras)
  • Barroisiceras (Texasia)

Barroisiceras is an acanthoceratacean ammonite from the Upper Cretaceous, Coniacian,<ref name="Sepkoski Ceph">{{cite web

Diagnosis

The shell of Barroisiceras is rather involute, coiled such that the outer whorl embraces much of the previous, and is generally compressed. Whorls are high with a strong crenulate keel and sparse umbilical tubercles that develop into pairs of commonly flat ribs.

Taxonomy

Barroisiceras is divided two subgenera, Barroisiceras (Barroisiceras) and Barroisiceras (Texasia),with Alstadenites sometimes added as a third, Barroisiceras (Alstadenites). B. (Barroiciceras) is moderately involute and the suture is rather simple. B. (Texasia) is more evolute and has a distinctly eccentric umbilicus and more complex suture.

Distribution

Cretaceous of Austria, Czechoslovakia, France, Hungary, Italy, Japan, Morocco, Slovakia, Spain, Trinidad and Tobago and USSR [2]

References

Notes
  1. Cite error: Invalid <ref> tag; no text was provided for refs named Sepkoski Ceph
  2. Cite error: Invalid <ref> tag; no text was provided for refs named fossilworks
Bibliography

Wikidata ☰ Q9166005 entry