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 cimicoides, Chiton [ Leptochiton cimicoides (Monterosato, 1879) ] ( Figures 1A, B ) 1878c: 77 [XXI: 391]—nomen nudum 1879c: 24 [XXII: 480]—available name Type material. MCZR–M–30001/L —1 sh (Lectotype) “ C. minimus, Monts = C. cancellatus (non Sow.)” back of the label “C. cancellatus (….) Sow”. MCZR –M–30001/P— 4 sh ( Paralectotypes ) + 1 sh ( Paralectotype ) on a stub for SEM analysis “ C. minimus, Monts = C. cancellatus (non Sow.)” back of the label “C. cancellatus (….) Sow”. Type locality. Palermo ( Sicily ). Described also from Gulf of Lion ( France ) and Dalmatia ( Croatia ). Remarks. Monterosato (1879a: 23) described Chiton minimus n. sp. , whereas Monterosato 1878 is nomen nudum. He introduced, however, the nomen novum C. cimicoides in the subsequent page, as possible replacement name for C. minimus Monterosato , non Spengler, 1797. The names proposed conditionally before 1961 are not to be excluded on that account alone ( ICZN, 1999, art. 11.5.1 ), and therefore, C. cimicoides is the name to use for this small elusive species, now usually placed in the genus Leptochiton J.E. Gray, 1847 (Dell’Angelo & Palazzi, 1987 ). Lepidopleurus intermedius von Salvini Plawen, 1968 (p. 251), described from Rovinj, Croatia , is regarded as a synonym, in spite of some differences in the ornamentation of girdle elements (Dell’Angelo & Palazzi, 1987 ; Kaas & van Belle, 1990 : 9). Dell’Angelo & Palazzi (1987) designated the lectotype and figured one paralectotype . Recorded by MolluscaBase (2018) as Leptochiton cimicoides (Monterosato, 1879) .