New species and new records of families, genera and species of land snails (Mollusca, Gastropoda) from French Guiana

This paper presents an investigation of material collected during four intensive collecting trips of land snails in French Guiana from 1995 to 2020 and deposited in the French National Museum of Natural History collections. This material forms the basis of the following novelties: four families are reported for the first time from French Guiana: Diplommatinidae, Cystopeltidae, Thysanophoridae and Strobilopsidae; three native species: <i>Lyroconusplagioptycha</i> (Helicoidea, Thysanophoridae), <i>Pupisomamacneilli</i> (Pupilloidea, Valloniidae) and <i>Strobilopsmorsei</i> (Pupilloidea, Strobilopsidae) and one introduced species <i>Diplosolenodesoccidentalis</i> (Veronicelloidea, Veronicellidae) are reported for the first time from French Guiana; five new species are described: <i>Adelopomaquasimodo</i> Gargominy, <b>sp. nov.</b> (Cyclophoroidea, Diplommatinidae), <i>Lilloiconchagalbao</i> Gargominy, <b>sp. nov.</b> (Punctoidea, Cystopeltidae), <i>Protoglyptusbernicolae</i> Gargominy, <b>sp. nov.</b> (Orthalicoidea, Bulimulidae), <i>Pseudosubulinasanti</i> Gargominy, <b>sp. nov.</b> (Testacelloidea, Spiraxidae), and <i>Happiadecaensi</i> Gargominy, <b>sp. nov.</b> (Scolodontoidea, Scolodontidae). Finally, <i>Drymaeussurinamensis</i> Vernhout, 1914, <b>syn. nov.</b> is considered as a new synonym of <i>Mesembrinuslusorius</i> (L. Pfeiffer, 1855), and <i>Drymaeusarcuatostriatus</i> (L. Pfeiffer, 1855) is proposed as the new identification of <i>Drymaeusmeesi</i> sensu Tillier, 1980 non Breure, 1976.