Since the review of speciation in ancient lakes, a great deal of new information has
been obtained about the endemic cichlid species flocks in the African lakes. These
new data concern not only the results of extensive taxonomic revisions (and an increase
in the number of species involved), but have also provided more information on the
anatomy (functional and morbid), the biology and the ecology of the species. More is
now known about the age of the lakes, and there is geological and other evidence to
indicate that the evolution of the flocks was probably more "explosive" than was once
thought. Debate on the interrelationship of the flocks continues, with indications that
the cichlids of Lake Victoria, Edward and Kivu are components of a closely interrelated
superflock, phylogenetically distinct from that of Lake Malawi and those of Lakes Albert
and Turkana.