ammonites
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Regina rigida Say 1825 (glossy crayfish snake)

Reptilia - Squamata - Colubridae

PaleoDB taxon number: 155192

Alternative combination: Coluber rigidus

Belongs to Regina according to C. H. Ernst et al. 2002

Sister taxa: Regina alleni, Regina grahamii, Regina intermedia, Regina septemvittata

Ecology: amphibious carnivore