Cephalopoda - Ammonitida - Aulacostephanidae
Alternative spelling: Pararasenia
Parent taxon: Aulacostephanus according to M. S. Mesezhnikov 1984
See also Sepkoski 2002
Sister taxa: Aulacostephanus (Aulacostephanoceras), Aulacostephanus (Aulacostephanoides), Aulacostephanus (Aulacostephanus), Aulacostephanus erinus, Aulacostephanus eudoxus, Steueroceras jenkinsi
Subtaxa: Ammonites hector Aulacostephanus (Pararasenia) pischmae Aulacostephanus (Pararasenia) quenstedti Aulacostephanus (Pararasenia) semieudoxus Aulacostephanus (Pararasenia) subhibridus Aulacostephanus (Pararasenia) tobolicus
Ecology: fast-moving nektonic carnivore
Distribution:
• Jurassic of the Russian Federation (8 collections), Switzerland (1)
Total: 9 collections including 16 occurrences