FIGURE 21 in Oxychilus (Drouetia) viridescens (Gastropoda: Pulmonata: Oxychilidae), a new species from Santa Maria, Açores, and a review of the subgenus

FIGURE 21. Shells, genitalia and internal penis morphology of species of Drouetia. A, Oxychilus (Drouetia) miceui: shell, holotype (NHMUK 1989162); genitalia and penis, paratype, Caldeira de Santa Bárbara, Terceira. B, Oxychilus (Drouetia) furtadoi: shell, holotype (NHMUK 1989156); genitalia and penis, paratype, Fonte da Telha, Posto Santo, Terceira; the penial sheath was slit longitudinally to expose the muscle strands attaching the epiphallus to the distal penis. C, Oxychilus (Drouetia) minor: shell and genitalia, Ribeirinha, Faial; penis, Flamengos, Faial. Scale bars = 1 mm.