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 Family PSEUDOCOCCULINIDAE tenue, Propilidium (ex Jeffreys ms.) [ Copulabyssia tenuis (Monterosato, 1880 ex Jeffreys ms)] ( Figures 1I , J ) 1878c: 79 [XIX: 393]—nomen nudum 1880c: 66 [XXVII: 550]—available name Type material. MCZR–M–12144 —2 sh “ Propilidium pertenue Palermo (Monterosato) Jeffr. ”, “ Propilidium tenue, J. B. Biscay (Porcupine) ” (Jeffreys’ handwriting), “ Propilidium tenue n. sp. Jeffr. Palermo 280 m !” Type locality. Described from off Palermo ( Sicily ) [ Palermo 280 m depth, on the label], and from the Atlantic. Remarks. MolluscaBase (2018) records Propilidium tenue as taxon inquirendum. It is certainly not a Propilidium as defined by the type species ( Patella ancyloides Forbes ). Actually, it is a senior synonym of Copulabyssia corrugata (Jeffreys, 1883) (see Dantart & Luque 1994 : fig. 56) [new synonymy] . Jeffreys stated he had examined material of P. pertenue sent by Monterosato from Palermo (162.5 fms = c. 300 m , the depth of the type material of P. tenue reported in Monterosato, 1878c), and that he had previously given the manuscript name tenue to the new species (Jeffreys, 1883[ 1878–1885 ]: 674, April). Therefore, P. pertenue Jeffreys, 1883 (October) is also a junior synonym of Copulabyssia tenuis (Monterosato, 1880 ex Jeffreys ms.) [new combination] .