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 CARDIIDAE duregnei , Cardium (ex de Boury ms.) [ Acanthocardia echinata (Linnaeus, 1758) ] ( Figures 37K, L ) 1891c: 2 [XL: 946]—available name Type material. MCZR –M–14815 —1 sh “ C. duregnei BDD = bullatum no (LK) Arcachon (Duregne)” MCZR –M–14742 —4 sh + 1v dx not conspecific “ C. duregnei (De Boury) Monts in Bull. Soc. Sc. Nat ed Econ. Genn. 1891. Arcachon (Duregn, De Boury. Non medit.”. Type locality. Described from Monte Pellegrino † ( Sicily ) and Arcachon ( France ). Remarks. La Perna (2008b : 136, figs 1A–E) figured two syntypes (1 sh and 1 valve) of Cardium duregnei from the Monterosato collection. He quoted the lot number “MZR 14815” for both specimens, yet the single valve was arguably from MCZR–M–14742. According to La Perna (2008b) , Cardium duregnei is a lagoon ecophenotype of Acanthocardia echinata (Linnaeus, 1758) , a position that we share. Recorded by MolluscaBase (2018) as a synonym of Acanthocardia echinata (Linnaeus, 1758) . † propexum , Cardium [ Acanthocardia lunulata (G. Seguenza, 1880) ] ( Figures 37M, N ) 1891c: 2 [XL: 946]–available name Type material. MCZR–M–14744 — 4 v “ C. propexum, Monts in, Boll. Sc. Nat. ed Ec. 1892 p. 2 Ficarazzi. Non est C. brocchi Mager”, “Non est C. brocchii Mager in Jour. Conchyl. 1866 , p. 67, t. II, f. 4” Type locality. Described from Monte Pellegrino †and Ficarazzi † ( Sicily ) and Kattegat. Remarks. The identity of Cardium propexum and its synonymy with Acanthocardia lunulata (G. Seguenza, 1880) —a valid Mediterranean Pleistocene species—are discussed in La Perna & D’Abramo (2009), who examined the type material and noticed that three species are involved. Only two valves (La Perna & D’Abramo 2009: 679, figs 6A–B; herein Fig. 37M ) fit the original description of C. propexum . These valves seem also conspecific with a syntype given by Monterosato to Coen (1941: 169–170, pl. 1 fig. 11) , and belong to A. lunulata , a synonymy that we share. The two other valves were identified by La Perna & D’Abramo (2009) as Acanthocardia deshayesii ( Payraudeau, 1826 ) and A. echinata (Linnaeus, 1758) , respectively. Recorded by MolluscaBase (2018) as a synonym of Acanthocardia deshayesii ( Payraudeau, 1826 ) , it should rather be Acanthocardia lunulata (G. Seguenza, 1880) .