Boreozonacola hustedtii
Lange-Bertalot, Kulikovskiy & Witkowski 2010 Category: Symmetrical biraphid
BASIONYM: Boreozonacola hustedtii Lange-Bertalot, Kulikovskiy & Witkowski 2010
REPORTED AS: Naviculadicta pseudosilicula (Lange-Bertalot and Metzeltin 1996) | Naviculadicta pseudosilicula (Lange-Bertalot and Genkal 1999) | Navicula pseudosilicula (Hustedt 1942)
LM scalebar = 10 µm = 80 pixels.
Observations
Contributor: Loren Bahls - December 2011
Length Range: 21-46 µm
Width Range: 5.4-9.4 µm
Striae in 10 µm: 18-21
Description
Valves are linear, inflated in the center and sub-terminally to appear triundulate. Apices are cuneate and obtusely rounded. The axial area is very narrow. The central area is about half the width of the valve and circular. The raphe is weakly lateral with simple proximal ends curved toward the primary side of the valve. Distal raphe ends are hooked toward the secondary side. Striae are radiate in the middle and become parallel at the apices. Areolae are easily distinguished in LM and number 20-24 in 10 µm.
Further work is needed to determine the relation of B. hustedtii with Navicula lacuna Patrick & Freese 1961. Kulikovskiy et al. (2010) suggest that N. lacuna may be conspecific with N. pseudosilicula.
Original Description
Basionym: Boreozonacola hustedtii
Author: Lange-Bertalot, Kulikovskiy & Witkowski 2010
Length Range: 14-50 µm
Width Range: 4.5-10.0 µm
Striae in 10 µm: 17-18
Original Description
Valves linear, consistently inflated in the middle, minor inflated parts below the apices at least common in larger cell cycle stages; ends slightly cuneate obtusely rounded. Length 14-50 µm, breadth 4.5-10.0 µm i.e. comparatively a very wide size spectrum. Raphe characters as described for the genus. Axial area narrow, linear. Central area rather variable in size, in longer specimens larger, almost circular. Striae 17-18 in 10 µm. Areolae 20-22 in 10 µm.
Original Images
Cite This Page:
Bahls, L. (2011). Boreozonacola hustedtii. In Diatoms of the United States. Retrieved May 19, 2013, from http://westerndiatoms.colorado.edu/taxa/species/boreozonacola_hustedtii
Species: Boreozonacola hustedtii
Contributor: Loren Bahls
Reviewer: Sarah Spaulding
Image Credit: Loren Bahls
- Valves triundulate
- Striae radiate in middle
- Central area circular
Boreozonacola hustedtii has triundulate valves with a circular central area. Striae are radiate in the middle.
Compare
Boreozonacola hustedtii may be distinguished from B. olympica by its triundulate valves, larger circular central area and striae that are radiate in the middle.
Boreozonacola olympica
Boreozonacola lacuna
(Patrick & Freese) Lange-Bertalot, Kulikovskiy & Witkowski
Citations
Hustedt, F. (1942). Diatomeen aus der Umgebung von Abisko in Schwedisch-Lappland. Archiv für Hydrobiologie, Vol: 39, Issue: 1, 87-174 .
Kulikovskiy, M.S., Lange-Bertalot, H., Witkowski, A., Dorofeyuk, N.I. and Genkal, S.I. (2010). Diatom assemblages from Sphagnum bogs of the world. I. Nur bog in northern Mongolia. Bibliotheca Diatomologica 55: 1-326.
Lange-Bertalot, H. and Genkal, S.I. (1999). Diatoms from Siberia I. Islands in the Arctic Ocean (Yugorsky-Shar Strait). Iconographia Diatomologica 6: 1-292.
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.
Patrick, R.M. and Freese, L.R. (1961). Diatoms (Bacillariophyceae) from Northern Alaska. Proceedings of the Academy of Natural Sciences of Philadelphia 112(6):129-293.
Zimmermann, C., Poulin, M. and Pienitz, R. (2010). Diatoms of North America: The Pliocene-Pleistocene freshwater flora of Bylot Island, Nunavut, Canadian High Arctic. Iconographia Diatomologica (H. Lange-Bertalot, ed.), Volume 21, A.R.G. Gantner Verlag K.G., Ruggell, 407 pp.
Links & ID's
Index Nominum Algarum (INA)
California Academy of Sciences (CAS)
North American Diatom Ecological Database (NADED)
NADED ID: 46502
Autecology Discussion
Boreozonacola hustedtii has been found in Lower Lost Lake, Deer Lodge County, Montana, at an elevation of 2896 meters above mean sea level. The pH of Lower Lost Lake is 6.9 and the specific conductance is 14 µS/cm. Zimmermann et al. (2010) summarize the ecology and distribution of this taxon as follows: "This common freshwater taxon is oligohalobe (indifferent), pH circumneutral and particularly frequent in arctic, alpine and boreal regions of northern Europe, Asia and North America, such as Alaska including Adak Island, as well as the Siberian Islands. In central Europe, [B. hustedtii] occurs dispersed in oligotrophic water bodies of the Alps with low electrolyte content." B. hustedtii has also been reported from Nur Bog in northern Mongolia (Kulikovskiy et al. 2010).
Images
Lower Lost Lake, elev. 2896 m, Anaconda-Pintlar Wilderness, Deer Lodge County, Montana: home of Boreozonacola hustedtii.
Credit/Source: summitpost.org