A Revision of Benthobrookula Clarke, 1961 (Gastropoda, Trochoidea) inthe Southwestern Atlantic Ocean

摘要

A systematic revision of the species of Benthobrookula Clarke, 1961 from the Southwestern Atlantic Ocean was carried out. The globose protoconch, sculptured with a reticulate pattern, is recognized as a diagnostic character for the genus. Benthobrookula exquisita Clarke, 1961 and B. powelli Clarke, 1961 are redescribed and Cyclostrema calypso Melvill & Standen, 1912, Brookula pfefferi Powell, 1951 and Brookula strebeli Powell, 1951 are redescribed and allocated to Benthobrookula. Benthobrookula strebeli is validated on the basis of the study of topotypical specimens. Two new species are described: Benthobrookula argentina from South Georgia and Benthobrookula paranaensis from off Brazil. A new allocation of Scalaria brevis d'Orbigny, 1840 to Benthobrookula is proposed.