Kurtkrammeria lacusglacialis

Bahls 2013      Category: Asymmetrical biraphid
BASIONYM: Encyonopsis lacusglacialis Bahls 2013

Kurtkrammeria aequalis

 

Kurtkrammeria neoamphioxys

LM scalebar = 10 µm = 40 pixels.



Observations

Contributor: Loren Bahls - May 2013
Length Range: 58-80 µm
Width Range: 8.8-11.1 µm
Striae in 10 µm: 10-13 at the valve center, 16-18 near the ends

Description

Valves are rhombic-lanceolate and not, or only slightly, dorsiventral. Apices are narrowly rounded, but not protracted. The axial area is lanceolate and continuous with the undistinguished central area. The raphe is lateral, becoming filiform at the proximal and distal ends. Proximal raphe ends are weakly inflated and deflected dorsally. Distal raphe fissures are comma-shaped, and concave toward the ventral margin. Striae are radiate, becoming parallel to weakly convergent near the apices. Areolae number about 40 in 10 µm. A single stigma lies at the proximal end of the median stria on the dorsal side.



Original Description

Basionym: Encyonopsis lacusglacialis
Author: Bahls 2013
Length Range: 58-80 µm
Width Range: 8.8-11.1 µm
Striae in 10 µm: 10-13 at valve center, 16-18 near the apices

Original Description

Valves rhombic-lanceolate, not or slightly dorsiventral. Apices narrowly rounded, not protracted. Valve length 58–80 µm; valve width 8.8–11.1 µm. Axial area lanceolate, continuous with the undistinguished central area. Raphe lateral, filiform at the proximal and distal ends. Proximal raphe ends weakly inflated, deflected dorsally. Distal raphe fissures comma-shaped, concave toward the ventral margin. Striae radiate, parallel to weakly convergent near the apices, 10–13 in 10 µm at the valve center, 16–18 in 10 µm near the apices. A single stigma lies at the proximal end of the median stria on the dorsal side.

Original Images


Cite This Page:
Bahls, L. (2013). Kurtkrammeria lacusglacialis. In Diatoms of the United States. Retrieved April 27, 2017, from http://westerndiatoms.colorado.edu/taxa/species/kurtkrammeria_lacusglacialis

Species: Kurtkrammeria lacusglacialis

Contributor: Loren Bahls

Reviewer: Pat Kociolek

Citations

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.

Links & ID's

Index Nominum Algarum (INA)

Original INA

California Academy of Sciences (CAS)

North American Diatom Ecological Database (NADED)

NADED ID:

Autecology Discussion

This taxon has been collected from five higher elevation lakes in the Northern Rockies and North Cascades, where it occurs in low numbers. Here pH ranges from 6.50 to 7.60 and conductivity from 7 to 60 µS/cm.

Images

Summit Lake, Waterton Lakes National Park, Alberta: type locality of K. lacusglacialis.

Credit/Source: Barb Johnston, Parks Canada

Nada Lake, Chelan County, Washington: home of Encyonopsis lacusglacialis.

Credit/Source: Ryan Davis, Adventurers and Scientists for Conservation

 

- Transfer from Encyonopsis to Kurtkrammeria

This taxon page appeared under the genus Encyonopsis. The page was updated to follow the transfer to Kurtkrammeria made by Bahls (2015). - S. Spaulding