Cephalopoda - Ammonitida - Olcostephanidae
Full reference: R. W. Imlay. 1960. Ammonites of Early Cretaceous age (Valanginian and Hauterivian) from the Pacific Coast states. United States Geological Survey Professional Paper 334(F):1-228
Belongs to Olcostephanus according to R. W. Imlay 1960
Sister taxa: Olcostephanus (Jeannoticeras), Olcostephanus (Olcostephanus), Olcostephanus (Viluceras), Olcostephanus astierianus, Olcostephanus atherstoni, Olcostephanus delicatecostatus, Olcostephanus detonii, Olcostephanus paucicostatus, Olcostephanus popenoei, Olcostephanus sanlazarensis, Astieria neohispanica, Holcostephanus (Astieria) josephinus, Astieria zacatecana, Astieria raricostata, Astieria bangei, Maderia marcoensis, Maderia coahuilensis, Maderia marcosensis, Maderia casitensis, Taraisites bosei, Subastieria sulcosae, Subastieria sulcosus, Subastieria inordinata, Subastieria balkanica
Type specimen: USNM 129848, a partial shell
Ecology: fast-moving nektonic carnivore
Distribution:
• Cretaceous of United States (6: Oregon, Washington collections)
Total: 6 collections each including a single occurrence
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.