He solved the problem of " Appendicularia ", whose place in the animal kingdom Johannes Peter M�ller had found himself wholly unable to assign.
2.
A third class, the Larvacea ( or Appendicularia ), is the only group of tunicates to retain their chordate characteristics in the adult state, a product of extensive neoteny.
परिभाषा
free-swimming tadpole-shaped pelagic tunicate resembling larvae of other tunicates