Ibycus (gastropod)Ibycus is a genus of air-breathing semi-slugs, in the family Helicarionidae.SpeciesIbycus albacuminatus Ibycus cingulatus Ibycus coriaceus Ibycus fissidens Heynemann, 1863Ibycus hiraseanus Ibycus minutus Ibycus papuanus I. Rensch, 1932Ibycus perakensis Ibycus rachelae Schilthuizen & Liew, 2008Ibycus siamensis Cockerell, 1891