E. A.  Smith, ?Descriptions of a new species of Opisthostoma from Borneo?, Proceedings of the Malacological Society of London, vol. 6, p. 105, 1904.

E. A.  Smith, ?Description of a new species of Opisthostoma from North Borneo?, Proceedings of the Malacological Society of London, vol. 6, p. 105, 1905.

E. A.  Smith, ?Descriptions of three new species of Opisthostoma from Sarawak, North Borneo?, Proceedings of the Malacological Society of London, vol. 6, pp. 189-190, 1905.

J. Rle B.  Tomlin, ?New Malay land-shells?, Proceedings of the Malacological Society of London, vol. 27, pp. 224-225, 1948.