Kobayasiella
Lange-Bertalot 1999 Category: Symmetrical biraphid
TYPE SPECIES: Kobayasiella bicuneus (Lange-Bertalot) Lange-Bertalot
Image Credit: Loren Bahls
CLASS: Bacillariophyceae
ORDER: Naviculales
FAMILY:
- Striae radiate, may be crossed by longitudinal lines
- Striae very fine
- Axial area narrow
- Raphe straight, proximal raphe ends expanded
Kobayasiella valves are linear to linear-lanceolate, with ends rostrate or expanded and capitate. Because the striae often number more than 30 in 10 microns, they may not be visible in the light microscope. The striae are radiate in the center of the valve and become convergent at the valve apices. The raphe is filiform, with proximal raphe ends expanded. The raphe has fine, but distinctive ‘kinks’ or deflections at midvalve. Terminal raphe ends are strongly hooked.
Kobayasiella is found in low nutrient and acid waters, including peats of the northern hemisphere. As a group, this genus appears to be sensitive to anthropogenic influence, and negatively impacted by human activities. The genus contains the former Navicula subtilissima Cleve and its allies. Kobayasiella replaces the illegitimate genus Kobayasia Lange-Bertalot 1996.
Cite This Page:
Spaulding, S., and Edlund, M. (2008). Kobayasiella. In Diatoms of the United States. Retrieved April 24, 2014, from http://westerndiatoms.colorado.edu/taxa/genus/Kobayasiella
Contributor: Sarah Spaulding | Mark Edlund - December 2008
Citations
Buczko, K. (2007). The morphological variability of Kobayasiella parasubtilissima and K. micropunctata in the Carpathian basin. Proceedings of the 1st Central European Diatom Meeting 2007 Kusber, W.-H. & Jahn, R. (ed.) Botanic Garden and Botanical Museum Berlin-Dahlem 19-23.
Buczko, K. and Wojtal, A. (2007). A new Kobayasiella species (Bacillariophyceae) from Lake Saint Anna’s sub-recent deposits in the Eastern Carpathian Mountains, Europe. Nova Hedwigia 84: 155-166.
Buczko, K., Wojtal, A.Z. and Jahn, R. (2009). Kobayasiella species of the Carpathian region: morphology, taxonomy, and description of K. tintinnus spec. nov. Diatom Research 24: 1-21.
Burliga, A.L. and Kociolek, J.P. (2010). Kobayasiella species from Carajás National Forest, Amazonia, Brazil. Diatom Research 25: 235-250.
Kobayasi, H. and Nagumo, T. (1988). Examination of the type materials of Navicula subtilissima Cleve (Bacillariophyceae). Journal of Plant Research 101: 239-253. 10.1007/BF02488602
Lange-Bertalot, H. and Metzeltin, D. (1996). Indicators of oligotrophy - 800 taxa representative of three ecologically distinct lake types, Carbonate buffered - Oligodystrophic - Weakly buffered soft water. Lange-Bertalot, H. (ed.), Iconographia Diatomologica. Annotated Diatom Micrographs. Vol. 2. Ecology, Diversity, Taxonomy. Koeltz Scientific Books. Königstein, Germany, 2:390 pp.
Metzeltin, D. and Lange-Bertalot, H. (2007). Tropical Diatoms of South America II. Iconographia Diatomologica 18, 1-877.
Patrick, R.M. and Reimer, C.W. (1966). The Diatoms of the United States exclusive of Alaska and Hawaii, V. 1. Monographs of the Academy of Natural Sciences of Philadelphia 13.
Vanhoutte, K., Verleyen, E., Vyverman, W., Chepurnov, V. and Sabbe, K. (2004). The freshwater diatom genus Kobayasiella (Bacillariophyta) in Tasmania, Australia. Australian Systematic Botany 17: 483-496.