John Gilbert & E. Lubzens 
Rotifer Symposium VI [PDF ebook] 
Proceedings of the Sixth International Rotifer Symposium, held in Banyoles, Spain, June 3-8, 1991

As in previous symposia, some current research topics were selected for review and eight invited papers were presented. For the first time a paper was presented on the historical aspects of Rotiferology, covering European research between 1680-1950. A special workshop session was devoted to a debate on a controversial topic: Rotifer Phylogeny. The workshop resulted in a very successful discussion and the integration of scattered evidence and hypotheses on the phylogenetic origin of rotifers, the relationships between major rotifer groups, and the mechanisms of evolution.