Diplophrys marina, a New Scale-Forming Marine Protist with Labyrinthulid Affinities

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Abstract
A new marine protist frequently isolated form marine vascular plants and algae is described. The uninucleate, scale-covered cells have a prominent, refractive lipid body and branched, organelle-free ecotoplasmic elements extending from their polar extremities. The protist moves by ectoplasmic elements which do not arise from the membrane-generating sagenogens characteristic of the labyrinthulids. Observations on cellular ultrastructure, motility and habitat are presented as well as comparisons with labyrinthulids, Sorodiplophryx stercorea and Diplophrys archeri.