Cystiscus jucundus (W.H. Turton, 1932) South Africa, Kommetjie2,1 mm
Canalispira kerni E.F. Garcia, 2007 Florida, Key West5 mm
Pachybathron kienerianum (S.A.A. Petit De La Saussaye, 1838) Venezuela, Capo Codera9,4 mm
Gibberula kitsoni (A.C. Chapman, 1921)
Gibberula lachryma (L.A. Reeve, 1864)
Gibberula lalaina L. Bozzetti, 2012 Madagascar, Tulear2,4 mm
Gibberula langostera J. Espinosa & J.A. Ortea,2007
Gibberula laritzae J. Espinosa & J.A. Ortea,2014 Cuba
Plesiocystiscus larva (A.R.J.B. Bavay, 1922) Cuba3,4 mm
Gibberula lavalleeana (A.V.M.D. D'Orbigny,1842) Florida2,2 mm
Persicula lavelana (FOSSIL) F. Hodson, 1927 † Venezuela, Monagas
Gibberula lazaroi J.A. Contreras, 1992 Azores2 mm
Gibberula leibovitzae J.A. Ortea, 2015
Plesiocystiscus leonorae L. Bozzetti, P.M.S. Costa& T. Cossignani, 2010 Mozambique, Pemba
Gibberula lessingae J.A. Ortea, 2015
Gibberula lifouana (J.C.H. Crosse, 1871) New Caledonia4,6 mm
Canalispira lipei E.F. Garcia, 2007 Mexico, Yucatan6 mm
Gibberula lorenziana L. Bozzetti, 1997 Mauritius2,5 mm
Gibberula louisae (A.R.J.B. Bavay, 1913) Réunion2,3 mm
Gibberula lucia (F.P. Jousseaume, 1877) Senegal, Dakar8 mm
Gibberula luglii T. Cossignani, 2001
Plesiocystiscus luiscarlosi L. Bozzetti, P.M.S. Costa& T. Cossignani, 2010 Mozambique, Pemba1,85 mm
Gibberula lutea F.P. Jousseaume, 1884 South Africa6,2 mm
Gibberula macarioi J. Espinosa & J.A. Ortea,2006
Gibberula macula T. McCleery, 2009 Panama1,7 mm
Persicula maculosa (L.C. Kiener, 1834) Jamaica12 mm
Gibberula madbelono Ortea, 2017
Cystiscus mainardii T. Cossignani, 2009 Réunion1,6 mm
Persicula maldiviana T. Cossignani, 2001
Cystiscus maloloensis A. Wakefield& T. McCleery, 2006 Fiji Islands1,6 mm
Gibberula mamillata F. Boyer, 2014
Cystiscus manceli (F.P. Jousseaume, 1875) Mauritius9 mm
Gibberula mandyi J. Espinosa & J.A. Ortea,2006
Gibberula mapipi Ortea, 2017
Persicula maracaibensis (FOSSIL) F. Hodson, 1927 † Venezuela, Zulia, Miranda