Mariella
{{Short description|Extinct genus of molluscs}}
{{other uses}}
{{Automatic Taxobox
| fossil_range = {{fossil_range|Albian|Cenomanian}}
| image = Mariella lewesiensis.jpg
| image_upright = 0.7
| image_caption = Mariella lewesiensis fossil
| taxon = Mariella
| authority = Nowak, 1916
}}
Mariella is an ammonoid genus, named by Nowak (1916) from the upper Albian and Cenomanian stages of the mid Cretaceous, included in the Turrilitidae. Its type is Turrilites bergeri
Description
Mariella resembles Turrilites in general form. The shell is asymmetric, closely wound in a long expanding trochoidal spire. Ribs are slightly oblique and are rather feeble, each with 4 more or less equally spaced tubercles. Turrilites differs primarily in being more strongly ribbed and in having a more oval aperture.
Distribution
Fossils of Mariella have been found in Angola, Antarctica, Australia, Brazil, Canada (British Columbia), Colombia (Hiló Formation), France, Germany, Iran, Japan, Kazakhstan, Madagascar, Mexico, Mozambique, New Zealand, South Africa, Spain, Switzerland, Turkmenistan, Ukraine, the United Kingdom, and the United States (California, Texas, Oregon).[https://paleobiodb.org/classic/displayCollResults?collection_no=67357 Mariella] at Fossilworks.org
References
{{Reflist}}
Further reading
- {{cite book| first1=W.J. |last1=Arkell |first2=B. |last2=Kummel |first3=C.W. |last3=Wright |series=Treatise on Invertebrate Paleontology, Part L, Mollusca 4| title=Mesozoic Ammonoidea | publisher=Geological Society of America and University of Kansas Press |location=Lawrence, Kansas|year=1957}}
{{Taxonbar|from=Q6763154}}
Category:Albian genus first appearances
Category:Cenomanian genus extinctions
Category:Ammonites of South America
Category:Ammonites of Australia
Category:Cretaceous animals of Australia
Category:Ammonites of Antarctica
Category:Late Cretaceous ammonites of North America