Description of a new endemic Ganesella Blanford, 1863 snail from Yapen Island, Western New Guinea (Eupulmonata, Camaenidae)

A new species of the genus Ganesella Blanford, 1863 is reported for the first time from Yapen Island, Papua Province, Indonesia, a region renowned for its endemic flora and fauna. A comprehensive comparison with established species of Ganesella and related genera from Southeast Asia, and especially New Guinea, is conducted to highlight the unique characteristics of this new species, which has remained unobserved since its initial discovery in 1953.