Ostracodes from the Naco Formation (Upper Carboniferous) at the Kohl Ranchlocality, central Arizona

The Kohl Ranch locality in the Naco Formation (Upper Carboniferous, Desmoin esian) of central Arizona contains an ostracode fauna of 13 species of whic h three are left in open nomenclature because of inadequate materials; all of the others have been previously described. This fauna is strongly domina ted by Hollinella (Hollinella) bassleri (Knight, 1928), Cavellina pulchella Coryell, 1928, Bairdia whitesidei Bradfield, 1935, and Bairdiacypris (Faba licypris) regularis Cooper, 1946. Present in moderate numbers are Amphissit es (Amphikegelites) roundyi Knight, 1928, Moorities minutus Warthin, 1930, and Healdia simplex Roundy, 1926. Pseudobythocypris tomlinsonella Cooper, 1 946, Bairdia hoxbarensis Harlton, 1927, Sulcella sulcata Coryell and Sample , 1932, and species of Oliganisus, Sansabella and Chamishaella are represen ted by only small numbers of specimens. The dominant and moderately abundan t species indicate a shallow, offshore environment of deposition. The known geographical range of all species present in the fauna is extended into ce ntral Arizona.