| Summary: | Limestone hills are a popular places that researchers use to study species diversity of land snails. Limestone hills
provide not only a source of calcium carbonate that is important for shell formation, but also provides various types of microhabitat for the snails. In this study, eight localities of limestone hills in Loei and Nong Bua Lamphu Provinces were selected as the study area. Intotal,657specimens22species were found. Phu PhaLom had the highest number
of land snail species, where 16 species were found in this study, and the species diversity index is the highest at
2.263. Tham Pha Ya and Tha Maha Sombat had the lowest number of land snails species, with only 3 species, and
the species diversity index was 0.955 and 1.011, respectively. The similarity index is the highest between Pha Pha
Lom andTham Pha Ya Ss= 0.769, whereas it is lowest between WatTham Pha Sawanand WatTham WangThong;
and Wat Tham Pha Sawan and Wat Tham Maha Sombat Ss= 0.267.
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