The taxonomic revision of the genus Acallorneuma Mainardi, 1906 is here presented. To the four species previously known: Acallorneuma reitteri Mainardi, 1906 (Central Italy, Arpino), A. doderoi A. & F. Solari, 1908 (Sicily, Ficuzza), A. mainardii A. & F. Solari (Sardinia, Seui), A. peyerimhoffi F. Solari, 1938 (Algeria, Guerrouch), six species new to science are added: A. ingoi (Central Italy, San Donato Val Comino), A. sabellai (Sicily, Erice), A. montisalbi (Sardinia, Monte Albo), A. poggii (Sardinia, Dorgali), A. sardiniensis (Sardinia, Lula), A. gasparoi (Sardinia, Dorgali). For each taxon an accurate diagnosis and all disposable data about geographical distribution, biology and ecology are supplied. A key to species and a cladistic analysis are also given.