On the identity of Strombus coniformis Sowerby II, 1842 (Gastropoda, Strombidae), with additional notes on its distribution

Based on shell characters, Strombus (Conomurex) coniformis Sowerby II, 1842 can be distinguished from S. (C.) decorus (Röding, 1798). The distribution range of both forms is partly overlapping, without intermediates being known.
Therefore both have to be considered valid species. As the type specimens of S. (C.) coniformis are considered lost, a neotype for this species is designated. S. (C.) decorus masirensis Moolenbeek & Dekker, 1993 is a junior objective synonym of S. (C.) coniformis. Conomurex is considered a genus, rather then a subgenus of Strombus. New locality data for Conomurex coniformis are provided, forming a range extension for this species from Iran southwards to Eastern Africa.