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Showing results for tags 'maastrichthian'.
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I have recently acquired a nice Richardoestesia tooth from Hell Creek. I suppose it's R. isosceles. I decided to read more about this species, and felt really confused. Why is it even considered a dromaeosaur?? As far as I know, dromaeosaur teeth are not only usually smaller and strongly distally recurved, but also have no or very fine serrations on the mesial side and coarse serrations on the distal side. Richardoestesia teeth I've seen lack all of these characteristics: they have identical very fine serrations, straight and relatively large crowns. Actually, such teeth remind me a of land crocodylians, such as Sebecus from the Cenozoic, however Richardoestesia teeth are somewhat more labio-lingually compressed.