''Inyoites'' is an

ammonoid 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) ...

genus 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 ...

, included in the ceratitid family

Inyoitidae Inyoitidae is an extinct family of cephalopods belonging to the Ammonite order Ceratitida and superfamily Noritoidea Noritoidea, formerly Noritaceae, is an extinct superfamily of cephalopods belonging to the Ammonite order Ceratitida. Nori ...

. ''Inyoites'' was first described by

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and Smith. The type species, ''Inyoites owenii'', came from the ''Meekoceras'' bed of the Union Wash Formation, Inyo County,

California California is a U.S. state, state in the Western United States, located along the West Coast of the United States, Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the List of states and territori ...

. Another species, ''I. sedini'', from the

Olenekian In the geologic timescale, the Olenekian is an age in the Early Triassic epoch; in chronostratigraphy, it is a stage in the Lower Triassic series. It spans the time between Ma and Ma (million years ago). The Olenekian is sometimes divided into ...

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, was described by Yuri D. Zakharov and N. M. Abnavi in 2012. The shell of ''Inyoites'' is generally evolute, narrow, flat sided, with later whorls moderately enveloping those previous. The venter is moderately to sharply keeled, the suture is ceratitic, with smooth saddles and serrate lobes. ''Inyoites'' is described in W.J. Arkell, ''et al'', 1957 as "Platycones with high hollow keel and distinct umbilical shoulder; radial ribs that diminish toward compressed venter"

References

*W.J. Arkell,''et al'',1957; Mesozoic Ammonoidea,

Treatise on Invertebrate Paleontology The ''Treatise on Invertebrate Paleontology'' (or ''TIP'') published by the Geological Society of America and the University of Kansas Press, is a definitive multi-authored work of some 50 volumes, written by more than 300 paleontologists, and co ...

Part L, Mollusca 4. *

,A and J. P. Smith 1905. The Triassic cephalopod genera of America. United States Geological Survey Professional Paper 40:1-394
''Inyoites''Paleobiology Database
Noritoidea Ceratitida genera Triassic ammonites Ammonites of North America {{Ceratitida-stub