Placenticeras meeki
{{Short description|Species of mollusc (fossil)}}
{{Speciesbox
| fossil_range = Late Cretaceous
| image = Placenticeratidae - Placenticeras meeki.JPG
| image_caption = Fossil shell of Placenticeras meeki on display at the Museo Civico di Storia Naturale di Milano
| genus = Placenticeras
| species = meeki
| authority = (Böhm, 1898)
| synonyms =
}}
Placenticeras meeki is an ammonite species from the Late Cretaceous. These cephalopods were fast-moving nektonic carnivores. They mainly lived in the American Interior Basin (Western Interior Seaway).
Description
Shells of this species could reach a diameter of about {{convert|20 to 50|cm}}, although largest specimen could reach {{convert|1|m}}.{{Cite journal |last=Tsujita |first=Cameron J |last2=E.G. Westermann |first2=Gerd |date=1998-11-15 |title=Ammonoid habitats and habits in the Western Interior Seaway: a case study from the Upper Cretaceous Bearpaw Formation of southern Alberta, Canada |url=https://www.sciencedirect.com/science/article/abs/pii/S003101829800090X |journal=Palaeogeography, Palaeoclimatology, Palaeoecology |volume=144 |issue=1 |pages=135–160 |doi=10.1016/S0031-0182(98)00090-X |issn=0031-0182|url-access=subscription }} They are discoidal, involute and compressed. Whorls are stout and rounded to diameter of 3 millimeters. The surface of fossils is usually covered by opalized nacre (ammolite).
Etymology
The name honours American Palaeontologist Fielding Bradford Meek.
References
{{Reflist}}
- [http://www.ammonites.fr/Fiches/0749.htm Ammonites]
- J.B. Reeside [https://books.google.com/books?id=OkURAAAAIAAJ&dq=placenticeras+meeki+diameter&pg=PR42 A comparison of the genera Metaplacenticeras Spath and Platcenticeras Meek] Professional Paper - United States Geological Survey
- Sepkoski, Jack [http://strata.geology.wisc.edu/jack/showgenera.php?taxon=183&rank=phylum Sepkoski's Online Genus Database – Cephalopodes]
{{Taxonbar|from=Q18388822}}
Category:Late Cretaceous ammonites
{{ammonitina-stub}}