(Manguin ex Kociolek and Reviers) Nakov et al. ex Daniels et al. 2016 Category: Centric
BASIONYM: Cyclotella bodanica var. intermedia Manguin ex Kociolek and Reviers 1996
REPORTED AS: Cyclotella intermedia (Houk et al. 2010 (invalid)) | Lindavia intermedia (Nakov et al. 2015 (invalid))
Contributor: William Daniels - June 2012
Diameter: 12-34 µm
Rows of areolae in 10 µm: 11-13
Valves are disc-shaped and concentrically undulate, with both concave and convex centers. The valve is divided into two distinct parts, with the central part roughly 1/3 of the total diameter. Striae are alveolate and multiseriate, with 3-4 rows of fine porelli which are not readily seen in LM. Porelli spacing within rows is 45-50 in 10 µm. The striae are of mostly the same length, but are variably interrupted by short stria that give the appearance of branching costae near the margin. Isolated rimoportulae with simple external openings are observed at the central ends of 2 or 3 shortened striae. These rimoportulae are sometimes evenly spaced around the diatom and sometimes not. Internally, the rimoportulae are long, thin, and oriented oblique or perpendicular to the striae. The central area contains areolae and fultoportulae of varying size that are arranged randomly, to somewhat radially. Under SEM, the areolae are internally covered by cribra while the fultoportulae are bordered by 3 satellite pores. There may be a thin hyaline area (annulus) isolating the central-most areolae. Marginal fultoportulae are evenly spaced and located at the marginal ends of the costae.
Note that the combination and elevation in rank to species published in Houk et al. (2010), Cyclotella intermedia (Manguin) Houk, was invalid because it did not refer to the validating description of the species (Kociolek and Reviers 1996).
For a similar reason, the combination and elevation in rank to species published in Nakov et al. (2015) Lindavia intermedia (Manguin) Nakov et al., was invalid because because it did not provide a full and direct citation of the basionym by Kociolek and Reviers (1996) that validated the name (see ICN Art. 6.10, Art. 41.5).
Basionym: Cyclotella bodanica var. intermedia
Author: Manguin ex Kociolek and Reviers 1996
Diameter: 23 µm
Rows of areolae in 10 µm: 11
Diametre 23 µ. Zone marginale avec 11 stries en 10 µ, finement lignées, 2 a 3 points isolés (flamettes) en 10 µ; Zone intermédiaire parcourue par des rangés irrégulieres de ponctuations. Zone centrale courverte de ponctuations éparses.
Daniels, W.C., Novis, P.M. and Edlund, M.B. (2016). The valid transfer of Cyclotella bodanica var. intermedia to Lindavia (Bacillariophyceae). Notulae algarum 14.
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.
Kociolek, J.P. and de Reviers, B. (1996). The diatom types of Emile Manguin. II. Validating descriptions and designations of types for the New Caledonia species. Cryptogamie Algologie 17:193-215.
Manguin, E. (1961). Contribution à la flore diatomique de l’Alaska: Lac Karluk, espèces critiques ou nouvelles. Revue Algologique, Nouvelle Série 5(4): 266-288.
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
Manguin’s original description is based on plankton samples from Lake Karluk, an oligotrophic lake on Kodiak Island, Alaska. It has also been found in surface sediments of Toolik Lake in northern Alaska and possibly in oligotrophic alpine lakes in Germany and Austria.
Toolik Lake is an oligotrophic lake in a tundra landscape. Lindavia intermedia was found in the surface sediments at 8 m depth.
Corrected authorship on this website from Lindavia intermedia (Manguin ex Kociolek and Reviers) T. Nakov et al. 2015 to Lindavia intermedia (Manguin ex Kociolek and Reviers) Nakov et al. ex W.C.Daniels, Novis & Edlund 2016.
The combination and elevation in rank to species published in Nakov et al. (2015) Lindavia intermedia (Manguin) Nakov et al., was invalid because because it did not provide a full and direct citation of the basionym by Kociolek and Reviers (1996) that validated the name (see ICN Art. 6.10, Art. 41.5). - S. Spaulding
Transferred on this website from C. bodanica var. intermedia to L. intermedia, following Nakov et al. (2015). - S. Spaulding