About some marginelliform gastropods (Marginellidae Cystiscidae and Granulinidae) from French Guyana

Abstract

The study of a small collection of millimetric marginelliform gastropods sampled off French Guyana allows to recognize the occurrence of three species previously described, namely Er-atoidea margarita (Kiener, 1834), E. sulcata (d’Orbigny, 1842), and E. acutulla McCleery, 2011, and of 13 new species described as Hyalina oblongata n. sp., Volvarina similis n. sp., V. vitrea n. sp., V. cornea n. sp., Prunum guyanensis n. sp., Eratoidea mccleeryi n. sp., E. strangulata n. sp., E. inflata n. sp., E. angulosa n. sp., E. serratula n. sp., E. flavida n. sp., Gibberrula contracta n. sp. and Granulina ampla n. sp. The phenotypic variability and the geographic distribution are documented mainly with the help of data obtained from the O.C.P.S. collection (Leiden Museum), and more incidentally with the help of the 2011 Mc-Cleery’s revision of the Caribbean fauna of the genus Eratoidea Weinkauff, 1879.