Ref ID : 4256
David J. Patterson, Barbara Surek, and Michael Melkonian; The Ultrastructure of Vampyrellidium perforans Surek & Melkonian and Its Taxonomic Position among the Naked Filose Amoebae. J.Protozool. 34(1):63-67, 1987
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An account of the fine structure of Vampyrellidium perforans is given. The organism has filose pseudopodia, mitochondria with flattened cristae, and cytoplasmic microtubules, some of which arise from a perinuclear cytoplasmic sheath. Microtubules were observed within nuclei presumed to be at an early stage of division. Relatively massive (non-filose) pseudopodia are formed by cells feeding by engulfment. The cytoplasm of these pseudopodia has a fibrillar consistency with local aggregations of material. Despite sharing aspects of feeding behavior with vampyrellid filose amoebae, Vampyrellidium perforans is ultrastructurally more similar to Nuclearia, and it is here assigned to nucleariid filose amoebae.