A Opisthostoma castor van Benthem Jutting, 1952 BOR/MOL 10115. Perak, Ipoh, Gua Tok Giring Plot 1 BOpisthostoma cf. gittenbergeri BOR/MOL 9151. Perak, Ipoh, Gunung Kanthan Plot 4 COpisthostoma cf. subconicum BOR/MOL 9183. Perak, Ipoh, Gunung Kanthan Plot 4 DOpisthostoma cf. vermiculum BOR/MOL 11400. Perak, Ipoh, Gunung Tempurung Plot 2.

 
 
  Part of: Foon JK, Clements GR, Liew T-S (2017) Diversity and biogeography of land snails (Mollusca, Gastropoda) in the limestone hills of Perak, Peninsular Malaysia. ZooKeys 682: 1-94. https://doi.org/10.3897/zookeys.682.12999