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Fossil teeth of C. biauriculata from Khouribga (Morocco) Cretalamna teeth are distinguished by a broad triangular cusp and two lateral cusplets. The cutting edges of the teeth are razor-like, while the sides have a smooth surface. Teeth symmetry is variable; some have exact bilateral symmetry whereas others have high asymmetry.
Archaeolamna (from Greek arche which turned into archaeo and Lamna, an extinct shark genus) [1] is an extinct genus of mackerel sharks that lived during the Cretaceous.It contains three valid species (one with two subspecies) which have been found in Europe, North America, and Australia.
Lamna is a genus of mackerel sharks in the family Lamnidae, containing two extant species: the porbeagle (L. nasus) of the North Atlantic and Southern Hemisphere, and the salmon shark (L. ditropis) of the North Pacific.
Megalolamna is an extinct genus of large mackerel shark that lived approximately 23.5 to 15 million years ago (Mya), from the Late Oligocene to the Middle Miocene epochs. Fossils belonging to this genus are known from the Americas, Europe and Japan, and have been documented in scientific literature since the late 19th century.
A new fossil revealing the complete side view of Ptychodus measured nearly 1.5 meters (about 5 feet) in length, suggesting it was from was of a much smaller shark.
Lamna rupeliensis is a junior synonym with only lateral teeth. Isurolamna gracilis teeth from the Oligocene of Kazakhstan and Germany [1] Isurolamna(?) vandenbroeki: This is a rare species from the Early Oligocene (Rupelian) of Northwestern Europe and Kazakhstan. Baut & Génault (1999) placed it in the monotypic genus Lethenia.
The pieces are now reunited, creating a single 5.5-inch-long, 5.1-inch-wide tooth that came from one of the world’s most fearsome predators — a prehistoric shark that reached nearly 60 feet in ...
The relics recovered at San Pedro High School included parts of whales, teeth from megalodon sharks, saber-toothed salmon, and other fish that date back to nine million years ago. ... The fossils ...
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