Work found, with species-group names introduced therein:
Faber, M. J. 2006e. Marine gastropods from the ABC-islands and other localities. 10. A new species of the genus Pugnus (Gastropoda: Cystiscidae). Miscellanea Malacologica 2 19-20. [Stated date: 12 Nov 2006.] Pugnus margaritella