limpida, Setia [ Setia limpida Monterosato, 1884] (Figures 15D–H)

1884e: 279 [XXXf: 632]—available name

Type material. MCZR –M–22352 —5 sh “ Alger (Joly)!”// 7 sh “Marseille (Sollier)” Label in the box reading: “ Setia limpida ined. Monts Alger (Joly)”

Type locality. Described from Algiers (Algeria), coasts of Provence (France) and Ognina (Sicily).

Remarks. Currently considered as nomen dubium (MolluscaBase, 2018). The type material clearly belongs to Setia kuiperi (Verduin, 1984) [new synonymy]. We disagree with Villari & Scuderi (2017: 195) who synonymyzed S. kuiperi with S. sciutiana, the types of the two taxa clearly addressing to distinct species (see also Gaglini 1994). Unfortunately, at least Locard & Caziot (1901: 63) and Pallary (1900: 326) used Setia limpida after 1899 as the valid name for a species, making impossible the meeting of the first of two conditions for a name to be defined nomen oblitum (ICZN, 1999: art. 23.9.1.1, “the senior synonym …has not been used as a valid name”), and there are not 25 instances of use of S. kuiperi by 10 different authors to protect it (second condition, ICZN, 1999: art. 23.9.1.2).