Revision of the subfamily Pitarinae Stewart, 1930 (Eucallista Dall, 1902; Austrocallista Erdmann & Morra, 1985; Proteopitar gen. nov.) from Cenozoic southern South America: systematic and phylogenetic analyses

Systematic and phylogenetic analyses of fossil and extant Pitarinae of the South-Western Atlantic Ocean and Chile have been performed. The group is represented by Eucallista Dall, 1902 (early Miocene–Recent), Austrocallista Erdmann & Morra, 1985 (Eocene–Pliocene) and Proteopitar gen. nov. (middle Miocene–Recent). Eucallista and Austrocallista have sculptured nymphs and include species previously assigned to Amiantis Carpenter, 1864. Eucallista is represented by three species: the extant E. purpurata (Lamarck, 1818) (Pleistocene–Recent, South-Western Atlantic Ocean from Golfo San Matías [Argentina] to Espirito Santo [Brazil]) and two fossil taxa, E. laziarina (Ihering, 1907) from the Miocene and Pliocene of Chile, Argentina and Uruguay, and E. domeykoana (Philippi, 1887) from the Miocene and Pliocene of Chile and Peru. Austrocallista has four taxa: Austrocallista sp. from the Eocene of Santa Cruz Province, A. iheringi (Cossmann, 1898) from the late Oligocene–middle Miocene of Patagonia, A. australis (Feruglio, 1935) (lectotype MGGC 607) from the early Miocene of Santa Cruz Province, and A. boliviana (Philippi, 1887) from the Miocene and Pliocene of Chile and Peru. Proteopitar gen. nov. is erected to incorporate two species previously assigned to Pitar Römer, 1857: Proteopitar mutabilis (del Río & Martínez, 1998) from the middle Miocene–late Miocene of Argentina and the Pleistocene–Recent species Proteopitar patagonicus (d’Orbigny, 1835–1847) (from Rio de Janeiro [Brazil] to Bahía Vera [Chubut, Argentina]). These systematic hypotheses are corroborated by the phylogenetic analysis performed, which is the first one of the subfamily that includes fossil and extant taxa based on morphological characters of the shell. In addition, a new site on the coast of Río Negro Province which contains shells of the extant species is dated as 830 Ka BP (MIS21), being the oldest record of both extant species. http://www.zoobank.org/urn:lsid:zoobank.org:pub:16519263-4F9E-41AB-A009-EAC030681826.Fil: Alvarez, Maximiliano Jorge. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; ArgentinaFil: del Río, Claudia Julia. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; ArgentinaFil: Martinez, Sergio. Universidad de la Republica; Urugua

The family Donacidae (Bivalvia: Tellinoidea) in Thai waters

The species belonging to the family Donacidae living in Thailand waters are herein revised. After an exhaustive bibliographical search, 29 nominal species were found from this area. Materials from several institutions and specimens collected during fieldwork in Phuket and the Gulf of Thailand were studied. All the type materials were illustrated and redescribed. Details of the type localities, repositories, habitats and biogeographical distribution are discussed. In addition, some collected specimens and the type materials of the valid species and synonyms are illustrated. Currently, eight valid species are confirmed as living in Thailand waters: Donax (Deltachion) spinosus Gmelin, 1791, Donax (Deltachion) semigranosus (Dunker, 1877), Donax (Dentilatona) incarnatus Gmelin, 1791, Donax (Hecuba) scortum (Linnaeus, 1758), Donax (Latona) cuneatus Linnaeus, 1758, Donax (Latona) faba Gmelin, 1791, Donax (Latona) solidus Spengler, 1798 and Donax (Paraserrula) introradiatus Reeve, 1855. The presence of Donax (Deltachion) semisulcatus Hanley, 1843, Donax brazieri Smith, 1892, Donax (Tentidonax) veruinus Hedely, 1913 and Donax victoris Fischer-Piette, 1942 in Thailand waters remains uncertain. These species have been reported in the study area in the literature, but they were not sampled during this study.Fil: Signorelli, Javier Hernan. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Instituto de Biología de Organismos Marinos; ArgentinaFil: Printrakoon, Cheewarat. Kasetsart University; Tailandi