A Sicilian-Cretan biogeographical disjunction in the land snail genus Cornu (Gastropoda: Helicidae) Author Hausdorf, Bernhard Author Bamberger, Sonja Author Walther, Frank text Zoological Journal of the Linnean Society 2021 192 59 74 journal article 0024-4082 1B7C624C-FBB9-4F24-ADC4-8AA23E612F26 SUBGENUS ERCTELLA MONTEROSATO, 1894 Type species by subsequent designation ( Barker, 1999: 62 ): Helix mazzullii De Cristofori & Jan, 1832 . Remarks: Colomba et al. (2011) stated that the type species of Erctella was designated by Pilsbry (1895: 316) . However, Pilsbry (1895) only mentioned that Erctella was established ‘for H. mazzullii ’ and missed that Monterosato (1894) included Helix ( Erctella ) costae Benoit, 1857 as a second nominal species in Erctella or considered this unimportant because he included H. costae in the synonymy of H. mazzullii . This does not constitute a valid type species designation (see also: Welter-Schultes, 2012 ). Welter-Schultes (2012) suggested that Schileyko (2006) was the first to designate the type species of Erctella . However, this had already been done by Barker (1999) . It does not matter that Barker (1999) erroneously thought that H. mazzullii is the type species of Erctella by monotypy [as Schileyko (2006) also did; ICZN, 1999 : Article 69.1.1].