''Arcestidae'' is an extinct

family Family (from ) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). It forms the basis for social order. Ideally, families offer predictabili ...

ammonite Ammonoids are extinct, (typically) coiled-shelled cephalopods comprising the subclass Ammonoidea. They are more closely related to living octopuses, squid, and cuttlefish (which comprise the clade Coleoidea) than they are to nautiluses (family N ...

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

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

Triassic The Triassic ( ; sometimes symbolized 🝈) is a geologic period and system which spans 50.5 million years from the end of the Permian Period 251.902 million years ago ( Mya), to the beginning of the Jurassic Period 201.4 Mya. The Triassic is t ...

marine strata throughout the world, including

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Genera and species

* ''

Anisarcestes ''Anisarcestes'' is an extinct genus Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classificati ...

'' † Kittl 1908 * ''

Arcestes ''Arcestes'' is a genus of extinct Ceratitida, ceratitid Ammonoidea, 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 ...

'' † Suess 1865 ** ''

Arcestes andersoni ''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 ...

'' † Hyatt and Smith 1905 ** ''

Arcestes intuslabiatus ''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 ...

'' † Mojsisovics 1873 ** ''

Arcestes megaphyllus ''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 ...

'' † Beyrich 1864 ** ''

Arcestes priscus ''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 ...

'' † Waagen 1879 ** ''

Arcestes syngonus ''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 ...

'' † 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