Work found, with species-group names introduced therein:
Boyer, F., J. Neefs and A. Wakefield. 1998. A new species of Persicula from the Venezuelan region (Gastropoda: Cysticidae). Journal of Conchology 36(4) 15-20. [Stated date: -- Nov 1998; true date: < 24 Mar 99.] Persicula hennequini