Work found, with species-group names introduced therein:
Penas, A. and E. Rolán. 1997. La familia Pyramidellidae Gray, 1840 (Mollusca, Gastropoda) en Africa occidental. 1 El género Sayella Dall, 1885. Iberus 15 35-40. [Stated date: -- Jun 1997.] Sayella micalii, see Pyramidella dolabrata (Linnaeus, 1758)