''Trochactaeon'' 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 classification#ICTV classification, viruses. In bino ...

fossil A fossil (from Classical Latin , ) is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserve ...

sea snail Sea snails are slow-moving marine (ocean), marine gastropod Mollusca, molluscs, usually with visible external shells, such as whelk or abalone. They share the Taxonomic classification, taxonomic class Gastropoda with slugs, which are distinguishe ...

s, marine

gastropod Gastropods (), commonly known as slugs and snails, belong to a large Taxonomy (biology), taxonomic class of invertebrates within the phylum Mollusca called Gastropoda (). This class comprises snails and slugs from saltwater, freshwater, and fro ...

mollusk Mollusca is a phylum of protostomic invertebrate animals, whose members are known as molluscs or mollusks (). Around 76,000 extant species of molluscs are recognized, making it the second-largest animal phylum after Arthropoda. The ...

s in the family

Acteonellidae Acteonellidae is an extinct family of gastropods in the informal group Lower Heterobranchia (according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005). Taxonomy * Acteonellinae ** '' Acteonella'' d'Orbigny, 1843 - type genus In ...

. The genus was named in 1863. The genus ''Trochactaeon'' is known from the

Early Early may refer to: Places in the United States * Early, Iowa, a city * Early, Texas, a city * Early Branch, a stream in Missouri * Early County, Georgia * Fort Early, Georgia, an early 19th century fort Music * Early B, stage name of Jamaican d ...

to the

Late Cretaceous The Late Cretaceous (100.5–66 Ma) is the more recent of two epochs into which the Cretaceous Period is divided in the geologic time scale. Rock strata from this epoch form the Upper Cretaceous Series. The Cretaceous is named after ''cre ...

epochs.

Species

Species in the genus ''Trochactaeon'' include: * ''

Trochactaeon conicus ''Trochactaeon'' is an extinct genus of fossil sea snails, marine gastropod mollusks in the family Acteonellidae. The genus was named in 1863. The genus ''Trochactaeon'' is known from the Early to the Late Cretaceous The Late Cretaceous (1 ...

'' - late Cretaceous * '' Trochactaeon crisimensis'' Choffat, 1966''PART I. PALEOZOIC AND MESOZOIC GASTROPODA''
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References

Acteonellidae Early Cretaceous genus first appearances Late Cretaceous genus extinctions {{paleo-gastropod-stub