''Apleuroceras'' is a genus of

ceratitid Ceratitida is an order that contains almost all ammonoid cephalopod genera from the Triassic as well as ancestral forms from the Upper Permian, the exception being the phylloceratids which gave rise to the great diversity of post Triassic ammoni ...

ammonite Ammonoids are a group of extinct marine mollusc animals in the subclass Ammonoidea of the class Cephalopoda. These molluscs, commonly referred to as ammonites, are more closely related to living coleoids (i.e., octopuses, squid and cuttlefish) ...

s with an essentially smooth evolute shell with a subquadrade whorl section and a ceratitic suture with two lateral lobes (on either side). ''Apleuroceras'' belongs to the

Aplococeratidae Aplococeratidae is a family of ceratitids from the Middle Triassic with very simplified sutures and a tendency to lose their ornamentation. Shells are generally evolute, more or less compressed, with rounded venters. Ornamentation if present con ...

and has been found in middle

Triassic The Triassic ( ) is a geologic period and system which spans 50.6 million years from the end of the Permian Period 251.902 million years ago ( Mya), to the beginning of the Jurassic Period 201.36 Mya. The Triassic is the first and shortest period ...

formations of

Ladinian The Ladinian is a stage and age in the Middle Triassic series or epoch. It spans the time between Ma and ~237 Ma (million years ago). The Ladinian was preceded by the Anisian and succeeded by the Carnian (part of the Upper or Late Triassic). ...

age in Hungary and the Alps.

References

* Arkell ''et al'' 1957. Mesozoic Ammonoidea; Treatise on Invertebrate Paleontology, Part L (''L''158). Geological Society of America and University Kansas Press.
Paleobiology database ''Apleuroceras'' entry
accessed 9 December 2011 Aplococeratidae Middle Triassic ammonites Ceratitida genera Triassic ammonites of Europe {{Ceratitida-stub