Bacchites is an extinct ammonoid cephalopod genus belonging to the ceratitid

Ceratitida

The Ceratitida is an order that contains almost all ammonoid cephalopod genera from the Triassic as well as ancestral forms from the Upper Permian, the exception being the phylloceratids which gave rise to the great diversity of post Triassic ammonites....

 family, Juvavitidae.

Bacchites, named by Smith, 1927, has a subspherical shell with the closed umbilicus, the surface of which is almost smooth except for faint transvere ribs, vestigial constrictions, and a faint threadlike keel. The suture is ammonitic. This genus, previously included in the Haloritidae

Haloritidae

The Haloritidae is a family of subglobular, involute, Triassic ammonoids belonging the ceratitid superfamily Tropitaceae. Their shells may be smooth or may have ribs that cross or are interrupted on the venter, and may have nodes. Keels and ventral furrows are not typical. The last volution is...

, was removed to the Jovavitidae, established by Tozer, 1971, which is based on the genus Jovites. Both families are included in the Tropicaceae.

Bacchites has been found in upper Middle Triassic (Carnian

Carnian

The Carnian is the lowermost stage of the Upper Triassic series . It lasted from about 228.7 till 216.5 million years ago . The Carnian is preceded by the Ladinian and is followed by the Norian...

) age sediments in the Alps, Timor, and California.

References

• Arkel et al, Mesozoic Ammonoidea; Treatise on Invertebrate Paleontology, Part L, Ammonoidea. Geological Society of America & University of Kansas Press; R. C. Moore (ed)
• Bacchites -PaleoDB