See text The Orthalicoidea are a superfamily of air-breathing land snails, terrestrial gastropod mollusks in the infraorder Orthalicoidei of the suborder Helicina[2] The Orthalicoidea is a dominant faunal element in the Neotropics, but also has a number of genera with a Gondwanan distribution.

[1] This taxonomy, as accepted by Bouchet & Rocroi, was based on the study by Nordsieck, published in 1986,[3] and the classification as formulated by Schileyko in 1999.

[6] Family Prestonellidae van Bruggen, 1978 - A study by Herbert and Mitchell, published in 2009, places this enigmatic family, of which the phylogenetic relationships were previously unknown, in the Gondwanan superfamily Orthalicoidea,[7] while it was previously tentatively placed as a synonym of Aillyidae.

[5] Breure et al. (2010)[8] moved Prestonella and Bothriembryon to Placostylidae and they elevated Bulimulinae to Bulimulidae, Odontostomini to Odontostomidae, Amphibuliminae to Amphibulimidae.

[8] Breure & Romero (2012)[9] confirmed previous results from 2010, additionally they elevated Simpulopsini to Simpulopsidae, renamed Placostylidae to Bothriembryontidae.