Abstract

Abstract Three new species, O. brattstroemi, O. miuska, and O. wah, from the Florida Keys and Colombia, are described. The first-named species differs from O. indolens in having smaller notal tubercles, and in the shape of the male organ, and from other Atlantic species in wanting a penial papilla. O. miusha with a penial retractor of type II differs from O. marginata in lacking a caecum and concretions in the penial sac. O. wah has a symmetrical penial papilla much larger than that of O. armadilla. The known Westatlantic species are enumerated, and a key, based on the male organ, is given.

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