Nautiluses

A nautilus (; ) is any of the various species within the cephalopod family Nautilidae. This is the sole extant family of the infraorder Nautilaceae and the suborder Nautilina.

genus of molluscs

Species of nautilus

species of mollusc

The genus Allonautilus contains two species of nautiluses, which have a significantly different morphology from those placed in the sister taxon Nautilus. Mitogenome comparisons between Allonautilus and Nautilus confirm this split as the oldest divergence among living nautiloids, justifying their placement in separate genera.

species of mollusc

species of mollusc

species of mollusc

species of mollusc

species of mollusc

thumb|Eutrephoceras dorbignyanum thumb|Eutrephoceras dekayi from the [[Coon Creek Formation]]