Haedropleura secalina (Philippi, 1844)
Mediterranean.
Predator in the infralittoral.
Original taxon: Pleurotoma secalinum.
Synonym: Bela (Haedropleura) septangularis var. “parvulata”.
 
According to Philippi, the shell of this species differs from that of septangularis Montagu by « costis pluribus, magis convexis, ad suturam utrinque evanescentibus, minus contiguis. » – R. A. Philippi: Enumeratio molluscorum…, Berlin 1844, p.170.

Above and below: a shell collected at 8m deep, Vouliagmeni area, Attikí, SE. Greece. 8,65mm.
The main difference between secalina and septangularis is given by the protoconch: paucispiral in secalina (about 1,5 whorl before the appearance of the first radial folds) with a wide, globose embryonic whorl, vs. multispiral in septangularis, which bears a blunt embryonic tip.
50-80m deep, Poetto, Cagliari, S. Sardinia. 7,6mm.
Original pictures provided by A. Nappo (IT).
– (CC BY-NC-SA) –

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