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 Georissa bauensis Khalik, Hendriks, Vermeulen & Schilthuizen, 2018 Figures 18A , 50A Georissa bauensis Khalik et al., 2018 : 42. Type locality. "Wind Cave Passage 3, Wind Cave Nature Reserve, Bau, Sarawak, Malaysia". Material examined. Lobang Angin: ME 0908, ME 8731, ME 8736. Distribution in Borneo. Sarawak: Kuching Division. Endemic to Borneo. Remarks. Living snails were observed foraging on the wet vertical limestone rock surfaces covered with mosses and lichens. Figure 18. A Georissa bauensis Khalik, Hendricks, Vermeulen & Schilthuizen, 2018 ME 8731 Lobang Angin B Georissa everetti E. A. Smith, 1895 ME 0906 Gunung Batu [not in natural colour, shell surface coated with platinum for examination under scanning electron microscope] C Georissa hosei Godwin-Austen, 1889 ME 8498 Gunung Kapor D Georissa hungerfordi Godwin-Austen, 1889, ME 11472 Gunung Kapor E Georissa leucococca Vermeulen, Liew & Schilthuizen, 2015 ME 9496 Gunung Doya.