Reichardt 1997 Category: Asymmetrical biraphid
BASIONYM: Encyonopsis krammeri Reichardt 1997
REPORTED AS: Encyonopsis krammeri (Krammer 1997, p. 99, figs 144: 12-15, 21; 145: 1-14, 16-18)
Contributor: Loren Bahls - May 2013
Length Range: 11-21 µm
Width Range: 2.9-4.4 µm
Striae in 10 µm: 25-30
Valves are narrowly lanceolate and moderately dorsiventral with rostrate apices that are deflected slightly ventrally. The dorsal margin is arched and the ventral margin is straight or weakly convex. The axial area is narrow, located 1/3 to 1/2 the distance from the ventral margin to the dorsal margin. The central area is very small and continuous with the axial area. Raphe branches are filiform and bowed, concave to the dorsal margin. Proximal raphe ends are unexpanded and deflected dorsally. Distal raphe fissures are hooked toward the ventral margin. Striae are weakly radiate.
Basionym: Encyonopsis krammeri
Author: Reichardt 1997
Length Range: µm
Striae in 10 µm:
Bahls, L. (2013). Encyonopsis from western North America: 31 species from Alberta, Idaho, Montana, Oregon, South Dakota, and Washington, including 17 species described as new. Northwest Diatoms, Volume 5. The Montana Diatom Collection, Helena, 46 pp.
Krammer, K. (1997). Die cymbelloiden Diatomeen. Eine Monographie der weltweit bekannten Taxa. Teil 2. Encyonema part., Encyonopsis and Cymbellopsis. Bibliotheca Diatomologica 37:1-469.
Reichardt, E. (1997). Bermerkenswerte Diatomeenfunde aus Bayern. IV. Zwei neue Arten aus den Kleinen Ammerquellen. Berichte der Bayerischen Botanischen Gesellschaft (zur Erforschung der heimischen Flora) 68: 61-66.
NADED ID: 203010
Encyonopsis krammeri has been collected from several lakes in the northern Rocky Mountains of northwest Montana. The pH of these lakes ranged from 8.0 to 9.1 and specific conductance ranged from 93 to 164 μS/cm.
Bullhead Lake, Glacier National Park, Montana: home of Encyonopsis krammeri.
Credit/Source: Loren Bahls