Description of Gyropaigne
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Rhabdomonadine euglenids, rigid, non-flattened cells with pronounced helical keels, one emergent flagellum which is motile throughout its length during swimming, no ingestion device visible by light-microscopy, osmotrophic. Helikotropis Pochmann 1955 with one species is regarded a synonym. Type species G. kosmos Skuja, 1939.
