Arion nobrei C. Pollonera, 1889 Spain
Letourneuxia numidica (J.R. Bourguignat, 1866) Spain
Kobeltia obesoductus P.L. Reischütz, 1973 Italy
Arion occultus R. Anderson, 2004 Northern Ireland
Geomalacus oliveirae H.R. Simroth, 1891 Spain
Arion owenii S.M. Davies, 1979 Ireland
Arion pascalianus J.F. Mabille, 1868 Azores
Arion paularensis A. Wiktor & C. Parejo,1989 Spain
Mesarion ponsi J. Quintana, 2007 Spain, Menorca
Mesarion sibiricus (H.R. Simroth, 1901) Lake Baikal, Russia
Mesarion simrothi (K. Künkel, 1909) Europe
Arion speziae M. Lessona, 1881 Italy
Carinacauda stormi A.B. Leonard, L.F. Chichester, M.D. Richart& A.T. Young, 2011 Oregon
Mesarion subfuscus (J.P.R. Draparnaud, 1805) Austria
Arion timidus H.R. Simroth, 1891
Mesarion transsylvanus (H.R. Simroth, 1885) Romania
Arion urbiae A.J. de Winter, 1986 Spain
Arion vejdorskyi J.F. Babor & J. Koštal,1893 Czech Republic
Arion vulgaris (A. Moquin-Tandon, 1855) Bulgaria, Plovdiv
Kobeltia wiktori C. Parejo & Maratin, 1990 Spain, Asturias