(Cleve) Bahls 2015 Category: Asymmetrical biraphid
BASIONYM: Cymbella stodderi Cleve 1881
SYNONYM(S): Encyonopsis stodderi (Cleve) Krammer 1997
REPORTED AS: Cymbella stodderi (Cleve sensu Hustedt in Schmidt et al. 1944, fig. 377: 1, 2)
Contributor: Loren Bahls - January 2014
Length Range: 53-68 µm
Width Range: 9.2-11.2 µm
Striae in 10 µm: 9-11 at valve center, 11-13 at the ends (dorsal side)
Valves are broadly lanceolate with acutely rounded, very weakly protracted apices. The axial area is lanceolate and about one-third the valve width. The central area is absent or weakly expanded on the dorsal side. The raphe is lateral, becoming filiform at the proximal ends. Proximal raphe ends are weakly expanded and tipped towards the dorsal side. Distal raphe ends are reverse-lateral and bent towards the ventral side. Striae are radiate and become parallel then convergent at the apices. Areolae in the striae are very fine and cannot be resolved in LM.
Basionym: Cymbella stodderi
Author: Cleve 1881
Length Range: 75-90 µm
Width Range: 15 µm
Striae in 10 µm: 10
Bahls, L.L. (2015). Kurtkrammeria, a new genus of freshwater diatoms (Bacillariophyta, Cymbellaceae) separated from Encyonopsis. Nova Hedwigia . 10.1127/nova_hedwigia/2015/0263
Cleve, P.T. (1881). On some new and little known diatoms. Kongliga Svenska-Vetenskaps Akademiens Handlingar 18(5):1-28.
Krammer, K. (1997). Die cymbelloiden Diatomeen. Eine Monographie der weltweit bekannten Taxa. Teil 2. Encyonema part., Encyonopsis and Cymbellopsis. Bibliotheca Diatomologica 37:1-469.
Schmidt, A. (-). (1874-1959). Atlas der Diatomaceen-Kunde, von Adolf Schmidt, continued by Martin Schmidt, Friedrich Fricke, Heinrich Heiden, Otto Muller, Friedrich Hustedt. Reprint 1984, Koeltz Scientific Books, Konigstein, 480 plates.
Kurtkrammeria stodderi was described (as Cymbella stodderi) from fossil material collected at Bemis Lake in the White Mountains of New Hampshire. In the western United States it has been collected from a fen near Missoula, Montana, from a stream in northern California, and from a pond in Mount Rainier National Park, Washington (photo below). Water quality data are not available for these sites. Cleve (1881) also reports this taxon from Sphagnum in Brazil.
Berkeley Park Pond, Mount Rainier National Park, Washington: home of Kurtkrammeria stodderi.
Credit/Source: Ryan Davis, Adventurers and Scientists for Conservation.