Due to the limited amount of available information about the Garnieria and Triptychia groups, their systematic status has been changed frequently. Based on the similarities revealed by conchological analysis of several species and anatomical examination of Indionenia ardouiniana, the Garnieria group is now proposed to be classified with the subfamily Neniinae, as the tribus Garnieriini. A re-examination of the shell structure and paleontological records of the Triptychia group lead to the conclusion that it represents a subfamily, Triptychiinae, of the Clausiliidae.

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Nederlandse Malacologische Vereniging

M. Szekeres. (1998). The systematic position of the Garnieria and Triptychia groups, two ambiguous phylogenetic branches of Clausiliidae (Gastropoda Pulmonata). Basteria, 62(3/4), 175–179.