(Poretzky and Anisimova) Mann 1990 Category: Symmetrical biraphid
BASIONYM: Stauroneis wislouchii Poretzky and Anisimova 1933
Contributor: Loren Bahls - January 2012
Length Range: 25-40 µm
Width Range: 7.3-11.4 µm
Striae in 10 µm: 24-30
Valves are elliptical to elliptic-lanceolate with short protracted and broadly rounded apices. The axial area is narrow, barely wider than the raphe. The central area is a transverse rectangular fascia of variable width, often with one or more short striae at each margin. The raphe is filiform with nearly straight and somewhat expanded proximal ends. Terminal raphe fissures are hooked, the hooks opening towards the secondary side of the valve. Striae are nearly parallel in the middle and weakly radiate throughout the remainder of the valve. Striae near the center of the valve are more widely spaced than those towards the apices. Areolae in the striae are very fine and difficult to resolve in LM.
Basionym: Stauroneis wislouchii
Author: Poretzky and Anisimova 1933
Length Range: µm
Striae in 10 µm:
Bahls, L.L. (2012). Staurophora brantii, a new diatom (Bacillariophyta, Anomoeoneidaceae) from the northwestern Great Plains, USA. Phytotaxa 39: 31-37.
Hustedt, F. (1959). Die Kieselalgen Deutschlands, Osterreichs und der Schweiz, 2. Teil. In: Kryptogamen-Flora von Deutschlands, Osterreichs und der Schweiz, (Dr. L. Rabenhorst, ed.), Band VII(2). Reprint 1977, Otto Koeltz Science Publishers, Koenigstein, 845 pp.
Poretzky, V.S. and Anisimova, N.V. (1933). Materialien zur Ökologie der Diatomeen aus den Salzgewassern von Staraja Russia. Issled. Ozer. SSSR 2: 31-66.
Round, F.E., Crawford, R.M. and Mann, D.G. (1990). The Diatoms. Biology and Morphology of the Genera. Cambridge University Press, Cambridge, 747 pp.
There are 15 records for Staurophora wislouchii in the Montana Diatom Collection, all of them from streams on the Northwestern Great Plains in eastern Montana. The mean pH of these waters is 8.2 and the mean conductivity is 1975 µS/cm. Common diatom associates of Staurophora wislouchii in these waters are Hantzschia distinctepunctata, Parlibellus crucicula, Craticula ambigua, Fallacia omissa, Nitzschia siliqua, Planothidium hauckianum, Gyrosigma macrum, and Navicula germainii. Staurophora wislouchii was described from mineral springs of the Kurortes Staraja Russa south of Leningrad (Poretzky & Anisimova 1933). Hustedt (1959) reports this species from saline waters of interior eastern Europe and central Asia.
Musselshell River at Mosby Montana: home of Staurophora wislouchii.
Credit/Source: Loren Bahls