| In their account of the fresh water molluscs of Celebes P. & F. SARASIN (1898) described the genus Protancylus. They pointed out certain resemblances between Protancylus and Ancylus as well as between Protancylus and ”Miratesta, Isidora und Planorbis”. However, they did not present any conclusion regarding the systematic position of the group. In his famous handbook THIELE (1931) placed Protancylus in the family Ancylidae. Furthermore, he regarded Protancylus as congeneric with some of the main genera of the family, e.g. Burnupia, Ferrissia, and Gundlachia. In connection with extensive studies of the family Ancylidae I had to examine the morphology and systematic position of Protancylus. As a result the genus Protancylus proper proved to be distinct... |
