Zobrazeno 1 - 1
of 1
pro vyhledávání: '"Kosuke Okuhira"'
Publikováno v:
Journal of Paleontology. 89:611-616
Well-preserved upper and lower jaws of the aptychus-type found inside the body chambers of two specimens of the heteromorph ammonoidPravitoceras sigmoidaleYabe, 1902 (Nostoceratidae, Ancyloceratina) are described from the Upper Cretaceous Izumi Group