Catalogue of the primary types of marine molluscan taxa described by Tommaso Allery Di Maria, Marquis of Monterosato, deposited in the Museo Civico di Zoologia, Roma Author Appolloni, Massimo Author Smriglio, Carlo Author Amati, Bruno Author Lugliè, Lorenzo Author Nofroni, Italo Author Tringali, Lionello P. Author Mariottini, Paolo Author Oliverio, Marco text Zootaxa 2018 2018-09-14 4477 1 1 138 journal article 29178 10.11646/zootaxa.4477.1.1 5846b72f-37ca-4033-af93-c20fb297add9 1175-5326 1454652 5A6191BD-03BA-4374-B779-B3E73652BC7C spirilla , Hyaloscala [ Epitonium spirillum (Monterosato, 1890) ] ( Figures 11A, B ) 1890a: 150 [XXXVIIIa: 904]—available name Type material. MCZR–M–23467 —17 sh “ Sc. spirilla Monts Nat. Sic. 1890 p. 11 Palermo” “ Scalaria spirilla n. sp. Monts. ms. Palermo” Type locality. Described from Palermo ( Sicily ). Remarks. Recorded by MolluscaBase (2018) as a synonym of Epitonium clathratulum (Kanmacher, 1798) . However, Epitonium spirillum differs from E. clathratulum in its smaller size, fewer and more lamellose axial ribs, squared whorls, larger and more acute protoconch. We consider E. spirillum as a valid species [ new status ] that replaces E. clathratulum in most of (if not all) the Mediterranean.