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Kobayasiella micropunctata

(H.Germ.) Lange-Bert. 1999      Category: Symmetrical biraphid
BASIONYM: Navicula subtilissima var. micropunctata H.Germ. 1981
SYNONYM(S): Kobayasia micropunctata (H.Germ.) Lange-Bert. 1996 | Navicula micropunctata (H.Germ.) H.Kobayasi and Nagumo 1988 
REPORTED AS: Navicula subtilissima (Hustedt 1961-1966, p. 89, fig. 1235) 

Kobayasiella madumensis


Kobayasiella okadae

LM scalebar = 10 µm = 80 pixels.


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


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: H.Germ. 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 23, 2018, from

Species: Kobayasiella micropunctata

Contributor: Loren Bahls

Reviewer: Rex Lowe


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)

Transfer INA

California Academy of Sciences (CAS)

Kobayasiella micropunctata CAS

North American Diatom Ecological Database (NADED)


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.


Mud Lake, Bob Marshall Wilderness, Flathead County, Montana: home of Kobayasiella micropunctata.

Credit/Source: John Pierce