Krammer 1997 Category: Asymmetrical biraphid
TYPE SPECIES: Encyonopsis cesatii Krammer
Valves of Encyonopsis tend to be only slightly asymmetrical in the apical axis. Some species may be nearly symmetrical to the apical axis and confused with other taxa. Striae are uniseriate. If a stigmoid is present, it will be located on the dorsal side of the central area. The raphe is positioned nearly centrally on the valve. Terminal raphe fissures are ventrally deflected. In contrast to Cymbella, the valves of Encyonopsis lack apical pore fields.
The valve shape of Encyonopsis is more naviculoid and less asymmetrical than many cymbelloid genera. Encyonopsis includes the former Cymbella microcephala complex, C. falaisiensis, C. cesatii, and C. kriegeri.
Cite This Page:
Spaulding, S., Edlund, M., and Metzeltin, D. (2009). Encyonopsis. In Diatoms of the United States. Retrieved May 23, 2013, from http://westerndiatoms.colorado.edu/taxa/genus/Encyonopsis
Reviewer: Sam Rushforth