Endolobus

Endolobus is an extinct genus from the nautiloid order, Nautilida. Nautiloids are a subclass of shelled cephalopods that were once diverse and numerous but are now represented by only a handful of species, including Nautilus. Endolubus is included in the family Koninckioceratidae which is part of the superfamily Tainoceratoidea (Kümmel, 1964. K424).

Endolobus Temporal range: Upper Mississippian - Lower Permian
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Cephalopoda
Subclass:	Nautiloidea
Order:	Nautilida
Family:	†Koninckioceratidae
Genus:	†Endolobus Meek & Worthen, 1865

The shell of Endolobus is an evolute spiral with whorl sections subelliptical; broadly rounded ventrally, narrowly rounded laterally, and slightly impressed dorsally (Kümmel, 1964. K424). There are low nodes on the flanks and the suture is slightly sinuous but with a prominent dorsal lobe. The siphuncle is small, subcentral, and orthochoanitic.

Endolobus has a range from the Lower Carboniferous (U Miss) to the Lower Permian and has been found in different locations in North America and eastern Europe.

References

• Kümmel, B. (1964); Nautiloidea—Nautilida, in the Treatise on Invertebrate Paleontology, Part K Nautiloidea; Geological Society of America and University of Kansas Press.
• Sepkoski, J.J. Jr. (2002). A compendium of fossil marine animal genera. D.J. Jablonski & M.L. Foote (eds.). Bulletins of American Paleontology 363: 1–560. Sepkoski's Online Genus Database (CEPHALOPODA)