Contribution to the knowledge of selected land gastropods of Galápagos (Ecuador) (Mollusca, Cycloneritida and Stylommatophora)

Abstract

The native nesic Helicin is the first Helicinidae recorded on Pinzón Island, and the non-indigenous Streptostele musaecola, found in Santa Cruz, is the first Streptaxidae recorded in the Galapagos archipelago. Other exotic species found for the first time are Cecilioides (Geostilbia) aperta (in Santa Cruz Is.) And Cecilioides sp. (in Santiago Is.), both Ferussacidae. Protoconchs, jaws and radules of species of Helicinidae, Euconulidae and Zonitidae are described for the first time; Hyalinia chathamensis is re-classified into the genus Glyphyalus.