Land caenogastropods of Mounts Mahermana, Ilapiry, and Vasiha, southeastern Madagascar, with conservation statuses of 17 species of Boucardicus

Quantitative, replicated altitudinal transects on the three mountains yield ed 25 caenogastropod species in six genera in four families. Madecataulus F ischer-Piette & Bedoucha, 1965, is synonymized under Boucardicus Fischer-Pi ette & Bedoucha, 1965. Presence is noted of the three large species Hainesi a crocea (Sowerby, 1847), Tropidophora sp. 1, and T. sp. 2. Descriptions ar e given of the small species Boucardicus albocinctus (E. A. Smith, 1893); B . antiquus sp. nov.; B. carylae sp. nov.; B. culminans (Fischer-Piette, Bla nc, Blanc & Salvat, 1993); B. curvifolius sp. nov.; B. delicatus sp. nov.; B. divei Fischer-Piette, Blanc, Blanc & Salvat, 1993; B. esetrae sp. nov.; B. fidimananai sp. nov.; B. fortistriatus sp. nov.; B. magnilobatus sp. nov .; B. mahermanae sp. nov.; B. rakotoarisoni sp. nov.; B. randalanai sp. nov .; B. simplex sp. nov.; B. tridentatus sp. nov.; B. victorhernandezi Embert on, 1998; Cyathopoma randalanai sp. nov.; Malarinia calcopercula Emberton, 1994; Tropidophora (Ligatella) vallorzi Fischer-Piette, Blanc, Blanc & Salv at, 1993; Omphalotropis vohimenae sp. nov.; and O. costulata sp. nov. Distributional data were available that allowed evaluation of each of the 1 7 Boucardicus species for its conservation status, applying the latest IUCN criteria. Four species are proposed as Critically Endangered, II as Endang ered, and two as Vulnerable.