Orthalicidae (orthalicid land snails) are a family of tropical air-breathing land snails, terrestrial pulmonate gastropod mollusks are classified in the informal group Sigmurethra of the clade Stylommatophora. 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.
The Orthalicidae belong to the Orthalicoidea, a superfamily in the clade Sigmurethra. Like other stylommatophorans, the Sigmurethra belong to the suborder Eupulmonata. Among the three subfamilies of Orthalicidae, the Bulimulinae are the most diverse, consisting of three tribes:
- subfamily Amphibuliminae P. Fischer, 1873 - synonym Peltellinae Gray, 1855 (check decision of International Commission on Zoological Nomenclature for Peltellinae) - 17 species
- subfamily Bulimulinae Tryon, 1867 - 1243 species tribe Bulimulini Tryon, 1867 - synonyms: Bulimidae Guilding, 1828 (inv.); Berendtiinae P. Fischer & Crosse, 1872; Bothiembryontidae Iredale, 1937 tribe Odontostomini Pilsbry & Vanatta, 1898 - 125 species tribe Simpulopsini Schileyko, 1999 - synonym: Tomogeridae Jousseaume, 1877
- subfamily Orthalicinae Albers, 1850 - synonym: Liguidae Pilsbry, 1891 - 83 species
Genera within the family Orthalicidae include: