''Arctotirolites'' is an extinct genus of cephalopod belonging to the

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) ...

subclass. It was described by

Popov Popov (; masculine), or Popova (; feminine), is a common Russian, Bulgarian, Macedonian and Serbian surname. Derived from a Slavonic word ''pop'' (, "priest"). The fourth most common Russian surname, it may refer to: * Alek Popov (born 1966), ...

in 1963, based on a single specimen found in the

Olenyok River The Olenyok (russian: Оленёк, sometimes spelled ''Оленек'', ''Olenek''; sah, Өлөөн, Ölöön) is a major river in northern Siberian Russia, west of the lower Lena and east of the Anabar. It is long, of which around is navigable. ...

basin, in the Olenikites zone of northern Siberia.

References

Ceratitida genera Xenodiscidae {{Ceratitida-stub