Amphibulima felina Guppy, 1873 accepted as Omalonyx unguis (A. d'Orbigny, 1836) (source of synonymy)
Omalonyx geayi Tillier, 1980 accepted as Omalonyx unguis (A. d'Orbigny, 1836) (additional source)
Omalonyx matheronii (Potiez & Michaud, 1838) accepted as Omalonyx unguis (A. d'Orbigny, 1836) (basis of record)
Omalonyx pattersonae Tillier, 1981 accepted as Omalonyx unguis (A. d'Orbigny, 1836) (original description)
Succinea cryptica Tillier, 1981 (original description)
Succinea gayana (A. d'Orbigny, 1835) (basis of record)
Testacella antillarum Grateloup, 1855 (status source)
Testacella guadeloupensis Lesson, 1838 accepted as Omalonyx unguis (A. d'Orbigny, 1836) (source of synonymy)

Guadeloupe for Testacella guadeloupensis Lesson, 1838 
Juan Fernandez Islands for Succinea cryptica Tillier, 1981 
Juan Fernandez Islands for Succinea gayana (A. d'Orbigny, 1835) 
Trinidad for Amphibulima felina Guppy, 1873