†Polyptychoceras (Polyptychoceras) obstrictum Jimbo 1894 (ammonite)
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Cephalopoda - Ammonitida - Diplomoceratidae
Alternative combinations: Diplomoceras obstrictum, Hamites obstrictus, Polyptychoceras obstrictum
Belongs to Polyptychoceras (Polyptychoceras) according to C. W. Wright et al. 1996
See also Anderson 1958 and Matsumoto 1959
Sister taxon: Polyptychoceras (Polyptychoceras) obliquecostatum
Ecology: fast-moving nektonic carnivore
Distribution:
• Cretaceous of Antarctica (3 collections), Japan (1), the Russian Federation (1), United States (1: California)
Total: 6 collections each including a single occurrence
Specimen images are retrieved through the ePANDDA API.
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