Description of Ellobiopsids

Circumscription: Parasites of marine invertebrates, attached externally. Multicellular with trophic and generative sections. Release of biflagellated distributive stages follows multiple fission. Ultrastructural identity: With very limited ultrastructural information, identity based largely on life history. Mitochondria with tubular cristae, trophic form with internal thick pellicle penetrated by membranous invaginations. Flagella without paraxonemal structures or hairs. Centriolar complexes embedded within folds of the nuclear envelope. Synapomorphy: Not specified. Ref: Whisler 1990.