Navicula piercei
Bahls 2012 Category: Symmetrical biraphid
BASIONYM: Navicula piercei Bahls 2012
LM scalebar = 10 µm = 40 pixels.
Observations
Contributor: Loren Bahls - March 2012
Length Range: 64-76 µm
Width Range: 6.8-8.0 µm
Striae in 10 µm: 11-13
Description
Valves are linear and subtly triundulate with a distinctly tumid middle and broadly rounded, somewhat wedge-shaped apices. Raphe branches are weakly lateral. Proximal raphe ends are straight or deflected slightly to the secondary side. Distal raphe fissures are hooked to the secondary side. The axial area is very narrow and linear. The central area is elliptical and asymmetric, bordered by 2-5 irregularly shortened and often faint striae. Striae are radiate, becoming convergent at the ends. Areolae in the striae number about 30 in 10 μm and are usually visible in LM.
Original Description
Basionym: Navicula piercei
Author: Bahls 2012
Length Range: 64-76 µm
Width Range: 6.8-8.0 µm
Striae in 10 µm: 11-13
Original Description
Valves linear and subtly triundulate with a distinctly tumid middle and broadly rounded ends, 64 –76 μm long, 6.8 – 8.0 μm wide. Raphe weakly lateral, proximal raphe endings straight or deflected slightly to the secondary side, distal fissures hooked to the secondary side. Axial area very narrow, linear. Central area elliptical and asymmetric, bordered by irregularly shortened and often faint striae. Striae radiate, becoming convergent at the ends, 11–13 in 10 μm, lineolae about 30 in 10 μm, visible in LM. For measurements, n = 23 valves.
Original Images
Cite This Page:
Bahls, L. (2012). Navicula piercei. In Diatoms of the United States. Retrieved May 24, 2013, from http://westerndiatoms.colorado.edu/taxa/species/navicula_piercei
Species: Navicula piercei
Contributor: Loren Bahls
Reviewer: Mark Edlund
Image Credit: Loren Bahls
- Valves linear, elongate
- Valve margin with tumid center
Navicula piercei has long linear valves with a tumid center.
Compare
Valves of Navicula angusta lack the tumid center. Navicula oblonga is larger and more robust than N. piercei.
Navicula angusta
Navicula oblonga
Citations
Bahls, L.L. (2012). Seven new species in Navicula sensu stricto from the Northern Great Plains and Northern Rocky Mountains. Nova Hedwigia, Beiheft 141: 19–38.
Links & ID's
Index Nominum Algarum (INA)
California Academy of Sciences (CAS)
North American Diatom Ecological Database (NADED)
NADED ID:
Autecology Discussion
Navicula piercei is known only from Copper Lake in Shoshone County, northern Idaho. Here, on the date the holotype sample was collected, pH was 7.5 and specific conductance was 40 μS/cm.