Abstract
The new bulimulid species, Drymaeus currais sp. nov., is described based on shell and anatomical features. It is endemic of Guapirá Island, belonging to the Currais Archipelago, a small protected area off Paraná coast. The species is thus, based at least on endemicity, endangered. It has as closest species D. castilhensis, another endemic species of Castilho Island, ~70 km northwards. Its main exclusivities are a banded shell (except for periumbilical area); a ureter ~1/3 opened (furrow); an external anus; a slightly different buccal and intestinal arrangement; a penis lacking internal chambers; a small receptacle with a genital appendix. Zoobank Register: urn:lsid:zoobank.org:pub:25B25A8B-CED0-4284-A799-5383998BE481.
Highlights
The taxonomy of land snails from southwestern Atlantic islands has been investigated in a long-term project
The Archipelago is located in the central portion of the Paraná coast (25°44′07.74′′S, 48°21′58.12′′W) approximately six nautical miles from the municipality of Pontal do Paraná, and consists of a group of three small rocky islets
SEM examinations were performed in a Zeiss device of the Laboratory of Electronic Microscopy of the Museu de Zoologia da Universidade de São Paulo – MZSP
Summary
The taxonomy of land snails from southwestern Atlantic islands has been investigated in a long-term project. Both remote oceanic island (about a thousand km off ) as well as islands located closer to the Brazilian coast (about 20‐30 km off ) have shown a high degree of endemicity of the land snail species, something close to 100%. The latest paper of this project described three new bulimulids, each one endemic from an island off the São Paulo coast – Castilho, Queimada Pequena and Alcatrazes (Simone & Amaral, 2018). The archipelago belongs to the National Marine Park of the Currais Islands, a marine protected area of 1,357.7 hectares (ICMBio, 2020)
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