Kützing 1833 Category: Asymmetrical biraphid
TYPE SPECIES: Encyonema paradoxum Kützing
Encyonema frustules are asymmetrical to the apical axis and symmetrical to the transapical axis. The dorsal margin is highly arched, while the ventral margin in straight or nearly straight. Stigmoids may be present or absent. If a stigmoid is present, it is located on the dorsal side of the central area. Distal raphe ends are ventrally deflected, while distal raphe ends of Cymbella are dorsally deflected. Apical pore fields are absent.
Cells may grow as single cells, produce mucilaginous sheaths, or form colonies within mucilaginous tubes. Encyonema is broadly distributed across North America, primarily in benthic habitats.
Cite This Page:
Spaulding, S., and Edlund, M. (2008). Encyonema. In Diatoms of the United States. Retrieved March 29, 2015, from http://westerndiatoms.colorado.edu/taxa/genus/Encyonema