Stauroneis lauenburgiana

Hustedt 1950      Category: Symmetrical biraphid
BASIONYM: Stauroneis lauenburgiana Hustedt 1950

Stauroneis kriegeri

 

Stauroneis livingstonii

LM scalebar = 10 µm = 40 pixels.



Observations

Contributor: Loren Bahls - December 2011
Length Range: 37-50 µm
Width Range: 9-11 µm
Striae in 10 µm: 18-22

Description

Valves are linear to linear-elliptic with convex to nearly parallel sides, narrowing to rostrate to capitate apices. Pseudosepta are present but positioned very near the valve ends. Raphe branches are filiform and straight. Proximal raphe ends are straight and slightly inflated. The axial area is narrow and linear, and typically bordered on each side by an uninterrupted longitudinal row of areolae. The central area is a rectangular stauros, sometimes oriented somewhat obliquely. Striae are parallel at the center, becoming weakly radiate towards the apices. Areolae are coarse, transversely oblong, and irregularly spaced and number 12-16 in 10 µm.



Original Description

Basionym: Stauroneis lauenburgiana
Author: Hustedt 1950
Length Range: 32-40 µm
Width Range: 10-11 µm
Striae in 10 µm: 18-21

Original Description

Original Images


Cite This Page:
Bahls, L. (2011). Stauroneis lauenburgiana. In Diatoms of the United States. Retrieved October 25, 2014, from http://westerndiatoms.colorado.edu/taxa/species/stauroneis_lauenburgiana

Species: Stauroneis lauenburgiana

Contributor: Loren Bahls

Reviewer: Mark Edlund

Citations

Bahls, L. (2010). Stauroneis in the Northern Rockies: 50 species of Stauroneis sensu stricto from western Montana, northern Idaho, northeastern Washington and southwestern Alberta, including 16 species described as new. Northwest Diatoms, Volume 4. The Montana Diatom Collection, Helena, 172 pp.

Hustedt, F. (1950). Die Diatomeenflora norddeutscher Seen mit besonderer Berücksichtigung des holsteinischen Seengebiets V-VII. Seen in Mecklenburg, Lauenburg und Nordostdeutschland. Archiv für Hydrobiologie 43:329-458, Tafs 21-41.

Krammer, K. and Lange-Bertalot, H. (1986). Bacillariophyceae. 1. Teil: Naviculaceae. In: Ettl, H., J. Gerloff, H. Heynig and D. Mollenhauer (eds.) Susswasserflora von Mitteleuropa, Band 2/1. Gustav Fisher Verlag, Jena. 876 pp.

Simonsen, R. (1987). Atlas and Catalogue of the Diatom Types of Friedrich Hustedt. J. Cramer, Berlin & Stuttgart 1: 525 pp.

Links & ID's

Index Nominum Algarum (INA)

Original INA

California Academy of Sciences (CAS)

Stauroneis lauenburgiana CAS

North American Diatom Ecological Database (NADED)

NADED ID: 62010

Autecology Discussion

Stauroneis lauenburgiana has been found in several lakes, ponds, marshes, and spring pools in Glacier National Park, Waterton Lakes National Park, and elsewhere in the Northern Rockies, but nowhere is it found in abundance. The pH of these waters ranges from 6.1 to 8.6 and specific conductance ranges from 75 to 332 µS/cm. Hustedt (1950) described this species from lakes in northern Germany.

Images

A spring pool along the Kintla Lake Trail, Glacier National Park, Montana: home of Stauroneis lauenburgiana.

Credit/Source: Mike Pasichnyk