Genus Acanthopetalum Verhoeff, 1900

Acanthopetalum Verhoeff, 1900, Zool. Jahrb. {Syst.}, 13: 52. Type species: Lysiopetalum sicanum Berlese, 1883, by subsequent designation by Hoffman & Lohmander (1964).

Rhopalopetalum Verhoeff, 1929, Mitt. Höhlen- und Karstforsch., 114. Type species: R. calyciferum Verhoeff, 1929, by subsequent designation by Jeekel (1971). Synonymy proposed by Hoffman (1980).

Anoplopetalum Brolemann, 1932, Bull. Soc. Zool. France, 57: 53. Type species: Rhopalopetalum (Anoplopetalum) Blanci Brolemann, 1932, by monotypy. Synonymy proposed by Hoffman (1980).

Atticopetalum Verhoeff, 1941, Mitt. Höhlen- und Karstforsch.: 48. Type species: Lysiopetalum pallidum Verhoeff, 1941, by monotypy. Synonymy proposed by Hoffman (1980).

Osmanopetalum Hoffman & Lohmander, 1964, Mitt. Hamb. Zool. Mus. Inst., 62: 124. Type species: Lysiopetalum kosswigi Verhoeff, 1940, by monotypy. Synonymy proposed by Hoffman (1980).

Two subgenera – Acanthopetalum and Petalysium, the Apennines (incl. Sicily and Lipari islands), Balkan Peninsula (mainly western and southern parts), Aegean coast of Turkey. Introduced on Malta and Gozo?