''Arcestidae'' is an extinct

family Family (from la, familia) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its ...

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) ...

cephalopod A cephalopod is any member of the molluscan class Cephalopoda (Greek plural , ; "head-feet") such as a squid, octopus, cuttlefish, or nautilus. These exclusively marine animals are characterized by bilateral body symmetry, a prominent head ...

s. Fossils of ''Arcestidae'' are found in the

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 ...

marine strata throughout the world, including

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, Georgia,

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Genera and species

* ''

Anisarcestes ''Anisarcestes'' 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, ar ...

'' † Kittl 1908 * ''

Arcestes ''Arcestes'' is a genus of extinct ceratitid ammonites found in Triassic-aged marine strata. Description Their shells were broad and rounded, giving them an almost spherical appearance. Unlike many other ammonites, the shells of ''Arcestes'' ...

'' † Suess 1865 ** '' Arcestes andersoni'' † Hyatt and Smith 1905 ** '' Arcestes intuslabiatus'' † Mojsisovics 1873 ** '' Arcestes megaphyllus'' † Beyrich 1864 ** '' Arcestes priscus'' † Waagen 1879 ** '' Arcestes syngonus'' † Mojsisovics 1873 * '' Stenarcestes'' † Mojsisovics 1896 ** '' Stenarcestes leiostracus'' † Mojsisovics 1875

References

* Arkell et al. Mesozoic Ammonoidea. Treaatise on Invertebrate Paleontology, Part L, 1957 Geological Society of America and University of Kansas press, R.C.Moore ed. * Johnston, F.N. Trias of New Pass Nevada (New lower Karnic ammonoids); Journal of Paleontology V.15 No 5 p 447–491, Sept 1941
Paleobiology Database
Ceratitida families Middle Triassic first appearances Late Triassic extinctions {{Ceratitida-stub