New name for Cylindrella intermedia G. B. Sowerby II, 1877 (Eupulmonata: Stylommatophora: Urocoptidae), selection of neotype, and clarification of type locality

Cylindrella intermedia G. B. Sowerby II, 1877, a land snail endemic to Jamaica, has long suffered from taxonomic ambiguity due to its vague original description, lack of a designated type locality, and the absence of type specimen(s). Although later reassigned to the genus Spirostemma based on shell morphology, the species has remained poorly documented in both the literature and in natural history collections. Complicating its nomenclature further, C. intermedia G. B. Sowerby II, 1877 is a primary homonym of Cylindrella brevis var. intermedia C. B. Adams, 1849. This study reexamines new and historical collection specimens, provides a redescription for the species based on conchological features, designates a neotype to establish a definitive type locality, and proposes a replacement name to resolve the homonymy: Spirostemma louhiae nom. nov.