The late Badenian (early Serravallian) conoideans from the Pidhirtsi Beds of western Ukraine (central Paratethys) have been investigated by means of a comprehensive and easy-to-perform

Akardita n. gen. is described for a small Pliocene to Recent group of carditids. The type species is Cardita subrevoluta de Stefani, 1888, from the lower Pliocene of Italy. The new genus includes Akardita iberica n. sp., from the lower Pliocene of southern Spain, and Cardita (Venericardia) monodi Nicklès, 1953, an extant species from West Africa. A few additional Neogene species from Europe could turn out to be representatives of the new genus, whose disappearance from European seas seems to be related to an increasing cooling trend during the Neogene-Pleistocene interval. Because of the confused status of carditid taxonomy, about which some observations are reported in the present work, it is not possible to assign the new genus to any of the traditional subfamilies.

A second revision of the Plio-Pleistocenic taxa of the family Tellinidae Blainville, 1814 of southern Europe is presented, 15 species are illustrated and discussed of which 3 described for the first time. For the genus Asbjornsenia Friele, 1886: Asbjornsenia pygmaea (Lovén, 1846); for the genus Strigilla W. Turton, 1822: Strigilla etrusca Brunetti M. & Della Bella, 2003; for the genus Bosemprella M. Huber, Langleit & Kreipl, 2015: Bosemprella incarnata (Linnaeus 1758), for the genus Fabulina Gray, 1851: Fabulina fabuloides Monterosato, 1884; for the genus Macomangulus Nordsieck, 1969: Macomangulus exiguus (Poli, 1791), Macomangulus tenuis tenuis (Da Costa, 1778); for the genus Oudardia Monterosato, 1884: Oudardia compressa (Brocchi, 1814), Oudardia strigilata (Philippi, 1844), Oudardia pliorecens n. sp. of the Tuscan-Emilian Plio-Pleistocene; for the genus Peronaea Poli, 1791: Peronaea planata planata (Linnaeus, 1758); for the genus Peronidia Dall, 1900: Peronidia albicans (Gmelin, 1791), Peronidia iberica n. sp. of the Spanish Early Pliocene, Peronidia intermedia n. sp. of the Italian Early Pliocene; Peronidia transiens (Cerulli-Irelli, 1909); for the genus Serratina Pallary, 1920: Serratina serrata (Brocchi, 1814, Renier m.s.). Some one specimen with open nomenclature are also reported and illustrated: Macomangulus sp. 1 of the Piedmont Early Pliocene.

A new species of the genus Favartia Jousseaume, 1880, is described and illustrated: Favartia plioelata n. sp. found in various localities of the Italian Pliocene and previously depicted by various authors such as Murexul cf. aradasii (Poirer, 1883, ex Monterosato m.s.), Murexul aff. aradasii (Poirer, 1883, ex Monterosato m.s.) and Favartia suboblonga (d’Orbigny, 1852). The new species is compared with the other species of the genus present in the Miocene and Pliocene of the Mediterranean Basin.

In this first part of the following review of the Plio-Pleistocenic taxa of the family Tellinidae Blainville, 1814 from southern Europe we illustrate and discuss 15 species, of which 5 are described for the first time, plus 3 subspecies, one of which is new for the science: For the genus Leporimetis Iredale, 1930: Leporimetis papyracea (Gmelin, 1791); for the genus Arcopagia T. Brown, 1827: Arcopagia corbis (Bronn, 1831), Arcopagia esteponensis n. sp. from the Spanish Early/Middle Pliocene, Arcopagia ligustica n. sp. from the Ligurian Early Pliocene, Arcopagia plioitalica (Sacco, 1901), Arcopagia sedgwicii (Michelotti, 1839), Arcopagia telata (Michelotti, 1839, Bonelli m.s.), Arcopagia villaverniensis Sacco, 1901; for the genus Arcopella Thiele, 1934: Arcopella balaustina balaustina (Linnaeus, 1758); Arcopella balaustina tenuilamellosa (Nyst & Westendorp, 1839) boreal host of the Calabrian from southern Italy; Arcopella crestii n. sp. from the Tuscan Late Pliocene; Arcopella pseudomista n. sp. from the Tuscan Early Pliocene; for the genus Gastrana Schumacher, 1817: Gastrana fragilis fragilis Linnaeus, 1758, Gastrana fragilis ovatella (Sacco, 1901), Gastrana fragilis elegans n. ssp. from the Tuscan Early Pliocene, Gastrana laminosa (J. Sowerby, 1827); for the genus Macoma Leach, 1819: Macoma obliqua (J. Sowerby, 1817), for the genus Psammotreta Dall, 1900: Psammotreta santacatalinae n. sp. from the Spanish Early Pliocene.