Online Dictionary of Invertebrate Zoology. A.R. Maggenti and S.L. Gardne. 2005.
planaea — pla·naea … English syllables
planaea — pləˈnēə noun ( s) Etymology: New Latin, from Latin planus flat more at floor : a hypothetical organism in the form of a ciliated planula supposed to be a stage in the evolution of the higher animals … Useful english dictionary