Valhallites

Valhallites is an extinct genus in the nautiloid order Nautilida which includes the living Nautilus found in the tropical western Pacific Ocean.

Valhalites belongs to the Koninckioceratidae, a family in the Tainoceratoidea, a nautilid superfamily.

Its shell is evolute, rapidly expanding, with a depressed, elliptical whorl section.

The shell itself bears short radial ribs, sinuous growth lines, and prominent longitudinal striae.

(Kummel, 1964 K427) The nautiloids are a subclass of shelled cephalopods that were once diverse and numerous but are now represented by only a handful of species.