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

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

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 ''A ...

. 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 period and system of the Paleozoic that spans 60 million years from the end of the Devonian Period million years ago ( Mya), to the beginning of the Permian Period, million years ago. The name ''Carbonifero ...

in what is now western Russia. ''

Aipoceras ''Aipoceras'' is a genus of loosely coiled aipoceratid nautiloid Nautiloids are a group of marine cephalopods ( Mollusca) which originated in the Late Cambrian and are represented today by the living ''Nautilus'' and ''Allonautilus''. Fossil ...

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