Gomphoneis herculeana var. abundans
Kociolek and Stoermer 1988 Category: Asymmetrical biraphid
BASIONYM: Gomphoneis herculeana var. abundans Kociolek and Stoermer 1988
LM scalebar = 10 µm = 40 pixels.
Observations
Contributor: Pat Kociolek - January 2011
Length Range: 76-160 µm
Width Range: 16-25 µm
Striae in 10 µm: 12-14 at the headpole, 13-16 at the footpole
Description
Valves linear-clavate, with a swollen middle section of the valve. Axial area narrow, straight and forming a relatively small, irregularly rounded central area that bears a single stigma. Raphe lateral, weakly undulate, with small external proximal ends. Striae are biseriate, with the areolae arranged alternately. Striae are radiate, becoming strongly radiate near the footpole. Striae number 8 to 12 in 10 µm in the central portion of the valve, 12 to 14 in 10 µm at the headpole and 13 to 16 in 10 µm at the footpole. Longitudinal lines are positioned approximately one-half the way between the axial area and margin. The apical pore fields are distinctly bilobed.
Original Description
Basionym: Gomphoneis herculeana var. abundans
Author: Kociolek and Stoermer 1988
Length Range: µm
Striae in 10 µm:
Original Description
Original Images
Cite This Page:
Kociolek, P. (2011). Gomphoneis herculeana. In Diatoms of the United States. Retrieved May 18, 2013, from http://westerndiatoms.colorado.edu/taxa/species/gomphoneis_abundans
Species: Gomphoneis herculeana
Contributor: Pat Kociolek
Reviewer: Rex Lowe
Image Credit: Pat Kociolek
- Valves linear-clavate
- Longitudinal lines positioned approximately one-half the distance between the axial area and margin
- Length 76-160 µm, breadth 16-25 µm
Valves linear-clavate. Valve length 76-160um, valve breadth 16-25um. Longitudinal lines are positioned approximately one-half the distance between the axial area and margin.
Compare
Gomphoneis herculeana var. abundans differs from G. herculeana by the proportionately more slender valves, and from G. minuta by the larger valves.
Gomphoneis herculeana
Gomphoneis minuta
Citations
Kociolek, J.P. and Stoermer, E.F. (1988). A preliminary investigation of the phylogenetic relationships among the freshwater, apical porefield-bearing cymbelloid and gomphonemoid diatoms (Bacillariophyceae). Journal of Phycology 24: 377-385. 10.1111/j.1529-8817.1988.tb04480.x
Links & ID's
Index Nominum Algarum (INA)
California Academy of Sciences (CAS)
Gomphoneis herculeana var. abundans CAS
North American Diatom Ecological Database (NADED)
NADED ID:
Autecology Discussion
Known only from Lake Tahoe and surrounding habitats, and from Montana.