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''Aturia'' is an extinct genus of Paleocene to Miocene nautilids within Aturiidae, a monotypic family, established by Campman in 1857 for ''Aturia'' Bronn, 1838, and is included in the superfamily 
''Aturia'' is likely derived from species of the genus '' Aturoidea'' of the family
Nautilaceae
The Nautilaceae form one of five superfamilies that make up the Nautilida according to Bernard Kummel (1964), and the only one that survived past the Triassic. The Nautilaceae comprise six families: Nautilidae, Paracenoceratidae, Pseudonautilidae ...
in Kümmel 1964.
''Aturia'' is characterized by a smooth, highly involute, discoidal shell with a complex suture and subdorsal siphuncle
The siphuncle is a strand of tissue passing longitudinally through the shell of a cephalopod mollusk. Only cephalopods with chambered shells have siphuncles, such as the extinct ammonites and belemnites, and the living nautiluses, cuttlefish, and ...
. The shell of ''Aturia'' is rounded ventrally and flattened laterally; the dorsum is deeply impressed. The suture, one of the most complex in the Nautiloidea, has a broad flattened ventral saddle, narrow pointed lateral lobes, broad rounded lateral saddles, broad lobes on the dorso-umbilical slopes, and a broad dorsal saddle divided by a deep, narrow median lobe. The siphuncle is moderate in size and located subdorsally in the adapical dorsal flexture of the septum. Based on the feeding and hunting behaviors of living nautiluses, ''Aturia'' most likely preyed upon small fish and crustaceans.
''Aturia'' is likely derived from species of the genus '' Aturoidea'' of the family Hercoglossidae
Hercoglossidae is a family of Nautilid in the superfamily Nautilaceae. It was established by Spath in 1927 for smooth, involute nautiloids characterized by a suture with differentiated elements, known from the Upper Jurassic to the Oligocene.
...
. Fossils of ''Aturia'' species are fairly cosmopolitan, being found from Paleogene-aged to Miocene-aged marine strata throughout the world: after the Miocene, the various species disappear from the fossil record. In contrast to Nautilidae
The nautilus (, ) is a pelagic marine mollusc of the cephalopod family Nautilidae. The nautilus is the sole extant family of the superfamily Nautilaceae and of its smaller but near equal suborder, Nautilina.
It comprises six living species in t ...
, ''Aturia'' has no modern descendants.
See also
*List of nautiloids
This list of nautiloids is a comprehensive listing of all genera that have ever been included in the subclass Nautiloidea, excluding purely vernacular terms. The list includes all commonly accepted genera, but also genera that are now considered in ...
References
* Kümmel, Bernhard, 1964; Nautiloidea- Nautilida, Chap in the Treatise on Invertebrate Paleontology, Vol K, Curt Teichert and R.C. Moore, eds, University of Kansas Press and the GSA. * Moore, Lalacker, and Fischer; Invertebrate Fossils, McGraw-Hill Pub. 1952; chapter on cephalopods. * Garima Sharma; Prehistoric Life, DK Pub. 2009 {{Taxonbar, from=Q3629411 Eocene animals of Oceania Prehistoric nautiloid genera Paleocene first appearances Miocene genus extinctions Oligocene animals of Oceania Prehistoric cephalopods of North America