Dugesia has eyespots on its head that detect light and shadows. It most likely moves in the direction of shadows in order to find food.
Dugesia sagitta was created in 1861.
Dugesia aenigma was created in 1984.
Dugesia golanica was created in 1991.
Dugesia sicula was created in 1948.
Dugesia tubqalis was created in 2012.
Dugesia notogaea was created in 1998.
Dugesia japonica was created in 1964.
On its head the Dugesia have lateral lobes and sensory organs called eyespots with make the dugesia look like it actually has eye on its head.
during ciliary movement in dugesia it holds the head in slanded pasition. since the cilia are absent in head region the place the head a little raised. thus in such ciliary movement head movements are different from tail movement.
it is a wave like movement. due to the rhythmic movement of diagonal muscles the move wave like.
Dugesia will exibit negative phototaxis. Look it up in a zoology book. here is an article as well. http://www.helium.com/items/1079086-the-observation-of-dugesia-in-response-to-light-and-gravity
during ciliary movement in dugesia it holds the head in slanded pasition. since the cilia are absent in head region the place the head a little raised. thus in such ciliary movement head movements are different from tail movement.