2017 205 p. (first paper is pages 1-180), 16, 2 figs, 41, 2 pls, 4to, paperbound. Cossmanniana. Volume 19.171 species of Conoidea are recorded from the Upper Oligocene of Aquitaine basin, accounting for nearly 14 % of all the gastropods that can be found there. Approximately 50 species were previously known from the same deposits. Out of these 171 species, 63 are described as new.