Land snails and slugs of Bau limestone hills, Sarawak (Malaysia, Borneo), with the descriptions of 13 new species Author Marzuki, Mohammad Effendi bin Institute of Biodiversity and Environmental Conservation, Universiti Malaysia Sarawak, 94300, Kota Samarahan, Sarawak, Malaysia & Institute for Tropical Biology and Conservation, Universiti Malaysia Sabah, Jalan UMS, 88450, Kota Kinabalu, Sabah, Malaysia fendiemz@gmail.com Author Liew, Thor-Seng https://orcid.org/0000-0002-9437-5924 Institute for Tropical Biology and Conservation, Universiti Malaysia Sabah, Jalan UMS, 88450, Kota Kinabalu, Sabah, Malaysia thorsengliew@gmail.com Author Mohd-Azlan, Jayasilan Institute of Biodiversity and Environmental Conservation, Universiti Malaysia Sarawak, 94300, Kota Samarahan, Sarawak, Malaysia text ZooKeys 2021 2021-04-27 1035 1 113 http://dx.doi.org/10.3897/zookeys.1035.60843 journal article http://dx.doi.org/10.3897/zookeys.1035.60843 1313-2970-1035-1 ED19022EA1704DB79587FEFE15D07854 4C2258D4EE6754488B9280D3AB0447A1 Geotrochus subscalaris Vermeulen, Liew & Schilthuizen, 2015 Figure 43B Geotrochus subscalaris Vermeulen et al., 2012: 129-131, fig. 91. Type locality. "Malaysia, Sabah, Sandakan Province, Kinabatangan valley, Batu Pangi". Material examined. Gunung Kapor : ME 1636. Distribution in Borneo. Sarawak: Kuching Division. Sabah: West Coast Division. Endemic to Borneo. Remarks. This is the first record of this species in Sarawak. No living snail was found during the surveys. The shells from Bau are more depressed than the shells from Sabah.