Sphenodiscus is an extinct genus of acanthoceratacean ammonite. The genus has been found from many continents and is thought to have had a large global distribution during the Maastrichtian stage of the Late Cretaceous.

Sphenodiscus is an extinct genus of acanthoceratacean ammonite. The genus has been found from many continents and is thought to have had a large global distribution during the Maastrichtian stage of the Late Cretaceous.

2010年6月1日 · Sphenodiscus siva (Forbes, 1846), originally described from India (Forbes, 1846, Kossmat, 1895, Kennedy and Henderson, 1992) is the oldest species in Europe and occurs within the Maastrichtian of the type Maastrichtian area in the Netherlands (Kennedy, 1986a).

The Cretaceous Atlas of Ancient Life is one component of the overarching Digital Atlas of Ancient Life project. This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

Sphenodiscus (Wedge Disc), also called tiger ammonites on the show, is an extinct genus of sphenodiscid ammonite cephalopod that lived in various parts of the world, around 83.5 - 64.5 million years ago, from the Campanian stage of the Late Cretaceous Period to the Danian Stage of …

Sphenodiscidae Hyatt, 1900. Common Name: Extant/Extinct. Key morphological features: Shell involute with weak ornamentation, often smooth. Suture lines narrow, but frilly with many lobes and complex elements. SIZE: Paleoecology: MOBILITY: Mobile (swim) FEEDING MODE: Predator. HABITAT: epifaunal. Sources: Wright, C. W., 1996.

Sphenodiscus is an extinct genus of acanthoceratacean ammonite. The genus has been found from many continents and is thought to have had a large global distribution during the Maastrichtian stage of the Late Cretaceous.

Sphenodiscus is an extinct genus of acanthoceratacean ammonite. The genus has been found from many continents and is thought to have had a large global distribution during the Maastrichtian stage of the Late Cretaceous.

Records of the ammonites Sphenodiscus lobatus and Sphenodiscuspleurisepta from the latest Cretaceous Gulf of Mexico region, the Western Interior Seaway and the Atlantic coast have repeatedly been used as a stratigraphic index for a Maastrichtian age.

Sphenodiscus is an extinct genus of acanthoceratacean ammonite. The genus has been found from many continents and is thought to have had a large global distribution during the Maastrichtian stage of the Late Cretaceous.