Protetragonites
{{Short description|Genus of molluscs (fossil)}}
{{Automatic taxobox
|fossil_range = from Jurassic to Cretaceous, {{fossil range|150.8|94.3}}[https://www.fossilworks.org The Paleobiology Database]
|image = Lytoceratidae - Protetragonites obliquestrangulatum.JPG
|image_caption = Fossil shells of Protetragonites obliquestrangulatum from Alpes-de-Haute-Provence, on display at Galerie de paléontologie et d'anatomie comparée in Paris
|taxon = Protetragonites
|authority = Hyatt, 1900
|synonyms =
- Hemitetragonites Spath, 1927
- Leptotetragonites Spath, 1927
}}
Protetragonites is an extinct genus of ammonoid cephalopods belonging to the family Lytoceratidae. These fast-moving nektonic carnivores lived from the Jurassic period Tithonian age to the Cretaceous period Aptian age.Sepkoski, Jack [http://strata.geology.wisc.edu/jack/showgenera.php?taxon=231&rank=class Sepkoski's Online Genus Database – Cephalopoda]
Species
- Protetragonites crebrisulcatus Uhlig, 1883
- Protetragonites obliquestrangulatum (Kilian, 1889)
- Protetragonites quadrisulcatus d'Orbigny, 1841
- Protetragonites zuegeli Maisch & Salfinger-Maisch, 2016{{Cite journal|author1=Michael W. Maisch |author2=Angélique Salfinger-Maisch |year=2016 |title=First record of the lytoceratid Protetragonites Hyatt, 1900 (Cephalopoda: Ammonoidea) from the Upper Jurassic of southwestern Germany |journal=Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen |volume=280 |issue=2 |pages=183–192 |doi=10.1127/njgpa/2016/0574 }}
Description
Shells of Protetragonites species reach a diameter of about {{convert|50|mm}}. Shells show few constrictions and a circular or triangular section.[http://crioceratites.free.fr/descript_protetragonites.htm Protetragonites]
Distribution
Fossils of species within this genus have been found in the Cretaceous rocks of Austria, Canada, Czech Republic, Slovakia, Dominican Republic, France, Hungary, Madagascar, Morocco, Poland, Spain, Russia, Ukraine, Western Sahara, as well in the Jurassic of Germany, Hungary and Italy.
References
{{Reflist}}
External links
- [http://lithotheque.franceserv.com/cephalopodes/fiche_genre.php?genre=Protetragonites Lithotheque.France]
{{Taxonbar|from=Q18345099}}
Category:Tithonian first appearances
Category:Early Cretaceous genus extinctions
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