Cosmioneis reimeri
Lowe and Sherwood 2010 Category: Symmetrical biraphid
BASIONYM: Cosmioneis reimeri Lowe and Sherwood 2010
LM scalebar = 10 µm = 40 pixels.
Observations
Contributor: Rex Lowe - December 2011
Length Range: 31-61.5 µm
Width Range: 11-18 µm
Striae in 10 µm: 13-14 in the center, 19 near the ends
Description
Valves are lanceolate with slightly rounded, protracted ends. Internally, a narrow pseudoseptum is present. The axial area is narrow, with a slightly wider central area. The proximal raphe ends are slightly expanded. The distal raphe ends are curved in the same direction. Internally, the raphe ends are anchor-shaped. Striae are punctate and radiate, curving from the margin toward the center of the valve. Striae are 13-14 in 10 μm in the center of the valve, becoming finer at the ends (19 in 10 µm). Areolae are round and number 18 in 10 µm.
Original Description
Basionym: Cosmioneis reimeri
Author: Lowe and Sherwood 2010
Length Range: 31-61.5 µm
Width Range: 11-18 µm
Striae in 10 µm: 13-14 in the center, 19 near the ends
Original Description
Valves lanceolate with rounded slightly protracted ends that have a narrow pseudoseptum internally. 31-61.5 μm long, 11-18 μm wide. Raphe occupies a narrow axial area, with a slightly wider central area. Proximal raphe ends slightly expanded on the valve surface in pyriform depression, Distal raphe ends are curved in in the same direction. Internally, raphe ends are anchor-shaped. Striae punctate, and radiate, curving from the margin toward the center of the valve. Striae 13-14 in 10 μm in the center becoming finer at the ends (19/10 µm). Punctae round, 18/10 µm.
Original Images
Cite This Page:
Lowe, R. (2011). Cosmioneis reimeri. In Diatoms of the United States. Retrieved May 18, 2013, from http://westerndiatoms.colorado.edu/taxa/species/cosmioneis_reimeri
Species: Cosmioneis reimeri
Contributor: Rex Lowe
Image Credit: Rex Lowe
- Valves lanceolate
- Ends protracted
- Central area slightly expanded
Valves are lanceolate with slightly rounded, protracted ends. Internally, a narrow pseudoseptum is present. The central area is slightly wider than the axial area.
Compare
Cosmioneis reimeri is most similar to in shape to C. grossepunctata but C. reimeri is larger and more lanceolate. Cosmioneis reimeri is also greater in maximum length than C. grossepunctata (62 μm vs. 38 μm) and maintains its distinct lanceolate shape and higher stria density.
Cosmioneis grossepunctata
(Hustedt) Mann
Citations
Lowe, R.L. and Sherwood, A.R. (2010). Three new species of Cosmioneis (Bacillariophyceae) from Hawai'i. Proceedings of the Academy of Natural Sciences of Philadelphia 160(1):21-28. 10.1635/053.160.0104
Links & ID's
Index Nominum Algarum (INA)
California Academy of Sciences (CAS)
North American Diatom Ecological Database (NADED)
NADED ID: