Polinices jukesii ( Reeve 1855 )

Hollmann, Thomas Huelsken Daniel Tapken Tim Dahlmann Heike Wägele Cynthia Riginos Michael, 2012, Systematics and phylogenetic species delimitation within Polinices s. l. (Caenogastropoda: Naticidae) based on molecular data and shell morphology, Organisms Diversity & Evolution (New York, N. Y.) 12 (4), pp. 349-375 : 367

Polinices jukesii ( Reeve 1855) ; Torigoe and Inaba (2011), sp. 84, p. 33, Pl. 2, Fig. 11.

Description

Shell Shell morphologically similar to P. mammilla but smaller in maximum size with up to 34 mm in height (type specimens: 31–34 mm; specimens analysed in this study: 13–25 mm), pyriform to ovate in shape. Ratio of shell height to shell width 1.27 ± 0.01 in specimens analysed with molecular methods (n 0 12) and 1.01 ± 0.05 in type specimens (n0 3; BMNH1991067.1 - 3 ). Aperture wide and semi-ovate, ratio from aperture height to total height 0.72 ± 0.06 in specimens analysed with molecular methods (n 0 12) and 0.58 ± 0.05 in type specimens (n 0 3). Umbilicus completely covered by a heavy callus in adult specimens; a small anterior umbilical groove may be present in juveniles. Parietal callus extending into umbilical callus without a sulcus .

Protoconch White, 1.25–1.50 whorls, size of first embryonic whorl 770 ± 60 μm (n 0 12) in specimens analysed in this study, 1.50–1.75 whorls, size of first embryonic whorl 790 ± 50 μm in type specimens (n 0 3).