''Librovitschiceras'' is a genus of nautilids, in the subclass

Nautiloid Nautiloids are a group of cephalopods (Mollusca) which originated in the Late Cambrian and are represented today by the living ''Nautilus'' and ''Allonautilus''. Fossil nautiloids are diverse and species rich, with over 2,500 recorded species. Th ...

ea, with a triangular cross section, included in the family

Aipoceratidae The Aipoceratidae are a small family of Carboniferous nautilids which have smooth shells and loosely coiled to faintly impressed whorls and in which the aperture may be modified at maturity. The Aipoceratidae include the Lower Carboniferous '' ...

. Its exact relationship with other aipoceratids is uncertain. Whorls are in contact, the siphuncle is slightly removed from the venter, which has a deep sinus. ''Librovitschiceras'' lived during the Late

Carboniferous The Carboniferous ( ) is a Geologic time scale, geologic period and System (stratigraphy), system of the Paleozoic era (geology), era that spans 60 million years, from the end of the Devonian Period Ma (million years ago) to the beginning of the ...

in what is now western Russia. ''

Aipoceras ''Aipoceras'' is a genus of loosely coiled aipoceratid nautiloids with laterally compressed whorls; shells expanding moderately to fairly rapidly with a tendency to uncoil at maturity. Juvenile forms are somewhat cyrtoconic. The apical end forms ...

'' and ''

Asymptoceras ''Asymptoceras'' is a genus of aipoceratids (Nautiloidea) similar to ''Aipoceras'' but tightly coiled and with only part of the body chamber divergent from the previous whorl. Shell evolute, expanding fairly rapidly; umbilicus open, perforate; ...

'' are possibly related.

References

* Bernhard Kummel, 1964. Nautiloidea - Nauilida;

Treatise on Invertebrate Paleontology The ''Treatise on Invertebrate Paleontology,'' published from 1953–2007 by the Geological Society of America and the University of Kansas, then 2009–present by the University of Kansas Paleontological Institute, is a definitive multi-authore ...

, Part K. Geological Society of America.
Fossilworks, ''Librovitschiceras''
Prehistoric nautiloid genera {{paleo-nautiloidea-stub