(Grunow) Nakov, Guillory, Julius, Theriot and Alverson 2015 Category: Centric
BASIONYM: Cyclotella bodanica var. affinis Grunow in Schneider 1878
SYNONYM(S): Cyclotella affinis (Grunow) Houk, Klee, and Tanaka 2010
Contributor: Joe Mohan - June 2016
Diameter: 13.2-33.0 µm
Mantle Height: 2.6-4.4 µm
Rows of areolae in 10 µm: 13-18 at margin
Valves are disc shaped. The valve face has a distinctly raised or depressed flat central area located about 1/2 between the valve center and margin. The central area contains areolae and fultoportulae in a weakly radiate pattern. In some specimens, a hyaline annulus is present at the center of the valve. Marginal alveolate striae in the outer 1/2 of the valve are radiate. In some specimens, the striae are split into two or three anastomosing branches. One to three rimoportulae are present on the valve face, typically located at the fork of a thickened rib or costa half way from the central area to the valve face-mantle junction. Fultoportulae are present at the valve margin on marginal ribs and aligned with every 4th or 5th stria.
The population observed here differ slightly from the lectotype population described by Houk et al. (2010, Pl 242, 243) by having more areolae in the central area. This population also lacks the hyaline brim of the central area as is typical of the lectotype population.
Basionym: Cyclotella bodanica var. affinis
Author: Grunow in Schneider 1878
Rows of areolae in 10 µm:
An C. Bodanica Eulenstein schliesst sich wieder eine in Nordamerika nicht seltene Cyclotella, welche sich durch kleinere Gestalt und entferntere radiale Punktreihen im Centrum unterscheidet und die ich einstweilen als Varietat affinis bezeichne.
Cleve, P.T. and Möller, J.D. (1878). Collection of 324 diatom slides with accompanying analyses of A. Grunow. Parts 1-6 (1877-1882), Upsala.
Fritz, S.C., Juggins, S. and Battarbee, R.W. (1993). Diatom assemblages and ionic characterization of lakes of the Northern Great Plains, North America: A tool for reconstructing past salinity and climate fluctuations. Canadian Journal of Fisheries and Aquatic Sciences 50(9): 1844-1856.
Houk, V., Klee, R. and Tanaka, H. (2010). Atlas of freshwater centric diatoms with a brief key and descriptions, Part III. Stephanodiscaceae A. Cyclotella, Tertiarius, Discostella. Fottea 10 (Supplement): 1-498.
Interlandi, S., Kilham, S. and Theriot, E. (1999). Responses of phytoplankton to varied resource availability in large lakes of the Greater Yellowstone Ecosystem. Limnology and Oceanography 44(3): 668-682. http://dx.doi.org/10.4319/lo.1999.44.3.0668
Nakov, T., Guillory, W.X., Julius, M.L., Theriot, E.C. and Alverson, A.J. (2015). Towards a phylogenetic classification of species belonging to the diatom genus Cyclotella (Bacillariophyceae): Transfer of species formerly placed in Puncticulata, Handmannia, Pliocaenicus and Cyclotella to the genus Lindavia. Phytotaxa 217 (3): 249–264. 10.11646/phytotaxa.217.3.2
Saros, J., Interlandi, S., Wolfe, A. and Engstrom, D. (2003). Recent changes in the diatom community structure of lakes in the Beartooth Mountain Range, U.S.A. Arctic, Antarctic, and Alpine Research 35(1): 18-23.
Schneider, O. (1878). Naturwissenschaftliche Beiträge zur Kenntniss der Kaukasusländer, auf Grund seiner Sammelbeute. Dresden. 160 pp. + 5 plates.
Soninkhishig, N., Edlund, M. and Peck, J. (2003). Diatom-based paleoenvironmental reconstruction of Lake Telmen for the last 6230 years. Mongolian Journal of Biological Sciences 1(1): 55-68. http://100zero.org/mjbs/archive/papers/Vol001Issue01/mjbs001-01-06.pdf
Lindavia affinis is a planktonic species found primarily in freshwater lakes, especially during periods of stratification. Lindavia affinis is considered ecologically similar to other species in the L. bodanica sensu lato group. This group consists of species that are low nitrogen specialists that have high light requirements (Interlandi et al. 1999). These species are able to remain suspended in the epilimnion of stratified lakes (Saros et al. 2003). Salinity optimum is 1.8 gL-1 (Fritz 1993). The species has been reported to occur at pH around 7 (Soninkhishig et al. 2003).