Protetragonites Explained
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.[1]
Species
- Protetragonites crebrisulcatus Uhlig, 1883
- Protetragonites obliquestrangulatum (Kilian, 1889)
- Protetragonites quadrisulcatus d'Orbigny, 1841
- Protetragonites zuegeli Maisch & Salfinger-Maisch, 2016[2]
Description
Shells of Protetragonites species reach a diameter of about . Shells show few constrictions and a circular or triangular section.[3]
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.
External links
Notes and References
- Sepkoski, Jack Sepkoski's Online Genus Database – Cephalopoda
- Michael W. Maisch . Angélique Salfinger-Maisch . 2016 . First record of the lytoceratid Protetragonites Hyatt, 1900 (Cephalopoda: Ammonoidea) from the Upper Jurassic of southwestern Germany . Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen . 280 . 2 . 183–192 . 10.1127/njgpa/2016/0574 .
- http://crioceratites.free.fr/descript_protetragonites.htm Protetragonites
