See text Haplotrematidae is a taxonomic family of predatory air-breathing land snails, terrestrial pulmonate gastropod mollusks in the superfamily Haplotrematoidea.

They occur from Alaska, through British Columbia, and as far south as northern Mexico, but they are predominantly snails of the eastern and western United States.

[3] Their shells vary in size from small (7 mm in diameter, or about 0.3 inches) to medium (32 mm, about 1.3 inches), usually with a low, flattened spire, a very wide umbilicus, and usually with the upper lip margin (at the aperture) curving downwards or straightened.

Essentially, haplotrematids have fewer cusps than most snails, but they are considerably elongated, suitable for the predatory life they follow.

Members of this family have been given the common name "lancetooth" snails, presumably based on this last anatomical characteristic.