Kobayasiella micropunctata
(Germain) Lange-Bertalot 1999 Category: Symmetrical biraphid
BASIONYM: Navicula subtilissima var. micropunctata Germain 1981
SYNONYM(S): Kobayasia micropunctata (Germain) Lange-Bertalot 1996 | Navicula micropunctata (Germain) Kobayasi & Nagumo 1988
REPORTED AS: Navicula subtilissima (Hustedt 1961-1966, p. 89, fig. 1235)
LM scalebar = 10 µm = 80 pixels.
Observations
Contributor: Loren Bahls - March 2012
Length Range: 19-23 µm
Width Range: 3.5-4.3 µm
Striae in 10 µm: difficult to resolve in LM
Description
Valves are linear-lanceolate with convex sides and capitate apices. Length-to-width ratio ranges from 4.9 to 6.0. The raphe is filiform and straight. Proximal raphe ends are distinctly expanded. Distal raphe ends are bent in the same direction. The axial area is narrow. The central area is elliptic and barely wider than the axial area. Individual striae are difficult to resolve in LM, except near the central area, where they are radiate and more widely spaced.
Original Description
Basionym: Navicula subtilissima var. micropunctata
Author: Germain 1981
Length Range: µm
Striae in 10 µm:
Original Description
Original Images
Cite This Page:
Bahls, L. (2012). Kobayasiella micropunctata. In Diatoms of the United States. Retrieved May 18, 2013, from http://westerndiatoms.colorado.edu/taxa/species/kobayasiella_micropunctata
Species: Kobayasiella micropunctata
Contributor: Loren Bahls
Reviewer: Rex Lowe
- Valves narrow
- Valve length-to-width ratio 4.9-6.0
- Central striae resolved in LM
Kobayasiella micropunctata has narrow linear-lanceolate valves 3.5 to 4.3 µm wide. Valve length-to-width ratio ranges from 4.9 to 6.0. Striae about the central area are more widely spaced and resolvable in LM.
Compare
Kobayasiella okadae and K. subtilissima have wider valves that are 7 to 9 µm and 5 to 6 µm wide, respectively. Valves of K. parasubtilissima have a larger length-to-width ratio (6 to 9) and striae that are more difficult to resolve near the central area.
Kobayasiella okadae
Kobayasiella parasubtilissima
Kobayasiella subtilissima
Citations
Germain, H. (1981). Flore des diatomées - Diatomophycées- eaux douces et saumâtres du Massif Armoricain et des contrées voisines d'Europe occidentale. Collection "Faunes et Flores Actuelles". Société Nouvelle des Editions Boubée, Paris. 444 pp.
Hustedt, F. (1966). Die Kieselalgen Deutschlands, Österreichs und der Schweiz unter Berücksichtigung der übrigen Länder Europas sowie der angrenzenden Meeresgebiete. 3.Teil. Reprint 1977 by Otto Koeltz Science Publishers, Koenigstein, Germany. 816 pp.
Kobayasi, H. and Nagumo, T. (1988). Examination of the type materials of Navicula subtilissima Cleve (Bacillariophyceae). The Botanical Magazine, Tokyo 101: 239-253.
Lange-Bertalot, H. (1996). Kobayasia bicuneus gen. et spec. nov. In: Iconographia Diatomologica, Annotated Diatom Micrographs (H. Lange-Bertalot, ed.), Vol. 4, pp. 277-287, Koeltz Scientific Books, Konigstein.
Lange-Bertalot, H. (1999). Kobayasiella nov. nom. ein neuer Gattungsname fur Kobayasia Lange-Bertalot 1996. In: Iconographia Diatomologica, Annotated Diatom Micrographs (H. Lange-Bertalot, ed.), Vol. 6, pp. 272-275, A.R.G. Gantner Verlag K.G., Vaduz.
Links & ID's
Index Nominum Algarum (INA)
California Academy of Sciences (CAS)
Kobayasiella micropunctata CAS
North American Diatom Ecological Database (NADED)
NADED ID:
Autecology Discussion
Kobayasiella micropunctata has been reported from two floating-mat fens in northwestern Montana. In one of these fens (Drosera Pond), pH was 8.46 and specific conductance was 19 µS/cm. Here it is found with K. okadae, K. parasubtilissima, and K. subtilissima. Kobayasi & Nagumo (1988) report this taxon from a pond in Japan with a pH of 6.8 and specific conductance of 131 µS/cm.
Images
Mud Lake, Bob Marshall Wilderness, Flathead County, Montana: home of Kobayasiella micropunctata.
Credit/Source: John Pierce