Taxon - Odkazy a literatura
bin Marzuki ME, Liew T-S, Mohd-Azlan J (2021): Land snails and slugs of Bau limestone hills, Sarawak (Malaysia, Borneo), with the descriptions of 13 new species, ZooKeys 1035: 1-113 [jako Opisthostoma ballorum Vermeulen, 1991]