Anomoeoneis
Pfitzer 1871 Category: Symmetrical biraphid
TYPE SPECIES: Anomoeoneis sphaerophora Pfitzer
Image Credit: Ditmar Metzeltin
CLASS: Bacillariophyceae
ORDER: Cymbellales?
FAMILY: Anomoeoneidaceae
- Striae distinctly punctate and irregular
- Central area extends to valve margins
- Distal raphe ends deflected and usually distinct
Anomoeoneis valves are lanceolate to elliptical-lanceolate in outline, with broadly rounded to capitate apices. The central area may be symmetrical or asymmetrical, extending unilaterally to valve margins. The distal raphe ends are deflected and usually distinct. The irregular striae and hyaline areas on both sides of the axial area distinguish Anomoeneis from Brachysira and Navicula. The chloroplast is a single multi-lobed plastid with a large spherical pyrenoid.
Anomoeoneis species grow in epipelic habitats of high conductance and brackish water, including estuaries. It is especially common in saline inland waters of the mid-western United States and western Canada.
Cite This Page:
Spaulding, S., Edlund, M., and Metzeltin, D. (2009). Anomoeoneis. In Diatoms of the United States. Retrieved May 24, 2013, from http://westerndiatoms.colorado.edu/taxa/genus/Anomoeoneis
Contributor: Sarah Spaulding | Mark Edlund | Ditmar Metzeltin - January 2009
Citations
Patrick, R.M. and Reimer, C.W. (1966). The Diatoms of the United States exclusive of Alaska and Hawaii, V. 1. Monographs of the Academy of Natural Sciences of Philadelphia 13.
Reimer, C.W. (1961). Some aspects of the diatom flora of Cabin Creek raised bog, Randolf Co., Indiana. Proceeding of the Indiana Academy of Sciences 71: 305-319.
Saros, J.E. and Fritz, S.C. (2002). Resource competition among saline-lake diatoms under varying N/P ratio, salinity and anion composition. Freshwater Biology 47: 87.