Liguidae Pilsbry, 1891 Orthalicidae (orthalicid land snails) are a family of tropical air-breathing land snails, terrestrial pulmonate gastropod mollusks are classified in the subfamily Orthalicoidea of the order Stylommatophora.

[2] They are medium-sized to large snails, from about 3 cm (about 1.2 inches) to 9 cm (about 3.5 inches) in shell length In former times, this family was often known as the Bulimulidae, but this term may also denote what today is the subfamily Bulimulinae.

The subfamily Bulimulinae replaces the former family Bulimulidae Crosse & P. Fischer, 1873.

Among the three subfamilies of Orthalicidae, the Bulimulinae are the most diverse, consisting of three tribes:[3] Breure et al. (2010)[5] elevated Bulimulinae to Bulimulidae, Odontostomini to Odontostomidae, Amphibuliminae to Amphibulimidae.

[5] Breure & Romero (2012)[6] confirmed previous results from 2010, additionally they elevated Simpulopsini to Simpulopsidae.