Cephalopoda - Ammonitida - Olcostephanidae
Parent taxon: Olcostephanidae according to J. R. Ovando-Figueroa et al. 2024
See also Aguirre-Urreta and Alvarez 1999, Arkadiev et al. 2000, Frau et al. 2016, González-Arreola et al. 2017, Imlay and Jones 1970, Klein 2005, Vašíček et al. 2023, Wright 1952 and Zell et al. 2015
Sister taxa: Garcites, Mexicanoceras, Olcostephaninae
Subtaxa: Aspidostephanus Cantianiceras Groebericeras Kilianiceras Negreliceras Proniceras Spiticeras Umiaites
Type: Spiticeras
Ecology: fast-moving nektonic carnivore
Distribution:
• Cretaceous of Antarctica (2 collections), Argentina (2), Chile (4), Colombia (1), the Czech Republic (2), Egypt (1), France (10), Georgia (1), Hungary (15), India (2), Iran (2), Iraq (4), Italy (3), Mexico (6), Morocco (4), Serbia and Montenegro (4), Spain (26), Ukraine (7), United States (9: California, Oregon), Yemen (11)
• Jurassic to Cretaceous of Chile (5), the Russian Federation (1), Spain (1), United States (1: Oregon)
• Jurassic of Argentina (2), Chile (1), Cuba (1), France (3), Hungary (1), India (7), Iraq (2), Mexico (1), Nepal (1), Peru (1), United States (6: California), Yemen (2)
Total: 152 collections including 214 occurrences