Complex sentence: J.K. Tucker and M.J. Tenorio's 2009 proposed classification system for the over 800 cone snail species, placed these species in 82 genera, and the genera within three families.
Split into simpler sentences: J.K. Tucker and M.J. Tenorio's 2009 proposed a classification scheme for the over 800 cone snail species. They placed the species in 82 genera, and the genera within three families.