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Pamphagus mutabilis
O. mutabilis – drawing Dr. A.A. de Groot, ca. 1940, unpublished – collection Ferry Siemensma

Genus Omnivora  Dumack, 2019

Diagnosis: Cells pyriform or droplet shaped if not deterred by large ingested food particles. Cells are strikingly inert. Cells ingest large food particles and numerous inorganic particles, e.g. sand particles.

Etymology: The name refers to the peculiar trait of Omnivora mutabilis to ingest inorganic material.
Type Species: Monotypic, Omnivora mutabilis comb. nov. (basionym Pamphagus mutabilis Bailey, 1853).

Ecology: Fresh water. Oligotrophic and mesotrophic water types. North-America, Europe.

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