Worlds of David Darling
Encyclopedia of Science
   
Home > Encyclopedia of Science

planarian




A flatworm found in marine and freshwater, identified by its triangular head with two light-sensitive eyespots. Planaria have flat, tail-like bodies, with extendable pharynxes for sucking in food. Reproduction is hermaphroditic or by asexual splitting, or regeneration. Length: 1in (2.54cm). Phylum Platyhelminthes; class Turbellaria; genera include Dugesia and Polycelis.


Related category

   • ZOOLOGY