Superorder Decapodiformes | Subclass Coleoidea Order Spirulida? | |
Similar Pohlsepia, Styletoctopus, Plectronoceras, Phragmoteuthis, Plectronocerida | ||
Shimanskya is a late Carboniferous fossil tentatively interpreted as an early spirulid. However it lacks any clearly diagnostic characters and its affinity is best considered to lie in an unresolved stem group.
References
Shimanskya Wikipedia(Text) CC BY-SA