National Museum of Nature and Science...(Ceratitina), Middle Triassic, Spitsbergen, AMNH 44353....
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National Museum of Nature and Science...(Ceratitina), Middle Triassic, Spitsbergen, AMNH 44353. Scale bar, 100 gm. (CD) Artinskia electraensis (Prolecanitina), Middle Permian, Nevada,
