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belongs to the Cretoxyrhinidae family
Mosasauridae) from north-east Mexico
offshore (2)
Ascocystites sp: Fossilworks (Paleobiology Database)
A magnificent and very rare example of this huge representative of the Cretaceous Lepisosteiformes
07392 - Top Rare 2.03 Inch Micraster (Heart Urchin) Upper Cretaceous Dyrosaurus phosphaticus belongs to the Cretoxyrhinidae familyWell preserved specimen. Micraster, Agassiz 1836 (heart urchin) Echinoidea Spatangoida Micrasteridae PaleoDB taxon number: 33430 Parent taxon: Micrasteridae according to A. G. Fischer 1966 See also Djabarov 1964 and Sepkoski 2002 Sister taxa: Brissopneustes, Cyclasterinae, Isopneustes, Ovulaster Subtaxa: Micraster (Gibbaster), Micraster (Micraster), Micraster (Plesiaster), Micraster acutus, Micraster americanus, Micraster carinatus, Micraster
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