Neostylidium, a new generic replacement name for Stylidium Dall 1907 (Gastropoda: Caenogastropoda: Cerithiidae) non Eichwald 1855 (Anthozoa).

The genus Stylidium (type species Turritella eschrichtii Middendorff, 1849, by original designation) was established by Dall (in Bartsch, 1907: 178) for a distinctive group of the gastropods in the Bittiinae (Cerithiidae) and remains in current active use (Houbrick, 1993; Bouchet & Rosenberg, 2013). However, the generic name Stylidium Eichwald (1855: 3) was established for a fossil coral prior to the mollusk generic name, which becomes a preoccupied junior homonym. The extinct coral Stylidium is well recognized in modern palaeontology (Bondarenko, 1993), and consequently, without grounds for suppression of the name, a new generic replacement name is necessary for the junior homonymic gastropod genus. In accordance with the International Code of Zoological Nomenclature, Neostylidium nom. nov. (type species Turritella eschrichtii Middendorff), is proposed as a replacement name for Stylidium Dall non Eichwald, in order to resolve homonymy.