LSG-SC24-420
Shark tooth (lower lateral)
Location: Shatsk sand quarry (Ryazan region, Russia)
Chronostratigraphy:
Erathem: Mesozoic
System: Cretaceous
Series: upper
Absolute age: around 90 million years
Diagnosis: teeth with evenly serrated cutting edges. Thick crown and root. A thick lobe runs along the labial crown-root limit. Lateral teeth have highly distally inclined crowns. In upper laterals, the the cusp apex is commonly positionned more distally than the most distal root branch.
As stated by Glikman (1980), P. curvatus is a transitional form between Palaeoanacorax obliquus and Ptychocorax, a shark with normal anacoracid-like anterior teeth and crushing lateral teeth.
References : Glikman L. S., 1980 : Evolution of cretaceous and cenozoic lamnoid sharks (in russian).

Created on

Tuesday, February 13, 2024

Posted on

Sunday, March 3, 2024

Dimensions

6480*2552

Tags

Anacoracidae Casier, 1947, Cretaceous, Elasmobranchii, Lamnae Glikman, 1964a, Mesozoic, Odontaspidida Glikman, 1964a, Osteodonta Glikman, 1964a, Shatsk

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• Fossil collection / Vertebrates

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