Herbert, D.G. & Rowson, B. (2011). Pupa menkeana Pfeiffer, 1853, type species of the speciose land snail genus GulellaAfrican Invertebrates. 52(2): 233–242.
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Herbert, D.G. & Rowson, B.
2011
<i>Pupa menkeana</i> Pfeiffer, 1853, type species of the speciose land snail genus <i>Gulella</i) Pfeiffer, 1856: correction of longstanding misidentification and designation of neotype (Mollusca: Eupulmonata: Streptaxidae).