''Anotoceras'' is a genus of smooth shelled, discoidal

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 a depressed, subtrigonal whorl section and ceratitic sutures included in the

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 ...

family

Otoceratidae Otoceratidae is an extinct family of cephalopods belonging to the Ammonite subclass in the order Ceratitida Ceratitida is an order that contains almost all ammonoid cephalopod genera from the Triassic as well as ancestral forms from the Upper P ...

. ''Anotoceras'' comes from the Lower

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 ...

of the

Himalaya The Himalayas, or Himalaya (; ; ), is a mountain range in Asia, separating the plains of the Indian subcontinent from the Tibetan Plateau. The range has some of the planet's highest peaks, including the very highest, Mount Everest. Over 100 ...

References

* Arkell et al., Mesozoic Ammonoidea, Treatise on Invertebrate Paleontology, Part L. Geol Soc of America and Univ Kansas press, 1957. R. C. Moore (ed) Otoceratina Ceratitida genera Late Triassic ammonites Extinct animals of Asia {{Ceratitida-stub