Reynesoceras
{{Short description|Extinct genus of ammonites}}
{{Automatic taxobox
| fossil_range = {{fossil range|Pliensbachian}}M. K. Howarth 2013. Treatise on Invertebrate Paleontology, Part L, Revised, Volume 3B, Chapter 4: Psiloceratoidea, Eoderoceratoidea, Hildoceratoidea.{{cite web | last = Sepkoski| first = Jack| title= Sepkoski's Online Genus Database|author-link =| year = 2002| url = http://strata.geology.wisc.edu/jack/showgenera.php?taxon=231&rank=class| accessdate = 2017-10-16 }}
| image =
| taxon = Reynesoceras
| authority = Spath, 1936
| type_species = Ammonites ragazzonii
| type_species_authority = Hauer, 1861
| subdivision_ranks = Species
| subdivision =
- R. ragazzonii Hauer, 1861
- R. angulosum Wiedenmayer, 1980
- R. morosum Bettoni, 1900
- R. subanguinum Meneghini, 1875
- R. acanthoides Reynès, 1868
- R. ausonicum Fucini, 1900
- R. dumortieri Del Campana, 1900
- R. medolense Hauer, 1861
- R. striatum Del Campana, 1900
| synonyms =
- Aveyroniceras Pinna & Levi-Setti, 1971
}}
Reynesoceras is genus of ammonites that lived during the upper Pliensbachian stage of early Jurassic. It has evolved from Prodactylioceras, or Cetonoceras. Dactylioceras (Eodactylites) has probably evolved from this genus. Aveyroniceras is a name for macroconchs of this genus. Their fossils were found in Europe, northern Africa, Asia, North America and South America.Kovács, Z. (2014). Toarcian Dactylioceratidae (Ammonitina) from the Gerecse Mts (Hungary). Hantkeniana, 9, 45-77.
Description
Ammonites of this genus had shells with depressed whorl section and single, coarse ribs. Ribs are crossing venter, but there is no bifurcation, which is often present on other genera belonging to Dactylioceratidae. Also, there are no tubercules, which is a thing that differs them from Tokurites.Repin Yu.S. Ammonitovaya shkala nizhney yury Severo-Vostoka Azii [Lower Jurassic ammonite geologic time scale of Northeast Asia]. Neftegazovaya Geologiya. Teoriya I Praktika, 2016, vol. 11, no. 4, available at: http://www.ngtp.ru/rub/2/47_2016.pdf
Distribution
British Columbia, Chile, Hungary, Italy and Morocco [https://paleobiodb.org/classic/checkTaxonInfo?taxon_no=15575 Paleobiology Database - Reynesoceras]. 2017-10-16.
References
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Category:Ammonites of North America
Category:Ammonites of South America
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