Tectonatica is a genus of sea snails, marine gastropod molluscs in the subfamily Naticinae of the family Naticidae, the moon snails.

[3] Fossils of Tectonatica are found in marine strata from the Eocene until the Quaternary (age range: from 61.7 to 0.0 million years ago.).

Fossils are known from various localities in Europe, North America, South America and Japan.

[1] This marine genus occurs in the Indo-West Pacific and off Australia (New South Wales, Northern Territory, Queensland, Tasmania, Victoria, Western Australia).

Species within the genus Tectonatica include: