Colnettia

Colnettia is a genus of extinct sea snails, marine gastropod mollusks in the family Trochidae, the top snails. This genus is known primarily from fossil records, indicating that it existed in prehistoric marine environments. The known time range for Colnettia is the Late Triassic period. The shells of Colnettia species are typically characterized by their trochiform (top-shaped) morphology, featuring a conical spire and a flattened or slightly rounded base. The ornamentation and shell structure, along with geographic distribution of fossil finds, are used to distinguish different species within the genus and to understand their evolutionary relationships within the Trochidae family.