Encyonopsis lacuscaerulei

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

Encyonopsis krammeri

 

Encyonopsis lacusglacialis

LM scalebar = 10 µm = 80 pixels.



Observations

Contributor: Loren Bahls - May 2013
Length Range: 36-61 µm
Width Range: 5.5-6.8 µm
Striae in 10 µm: 17-20

Description

Valves are linear and weakly dorsiventral, with triundulate or slightly concave dorsal and ventral margins. Apices are subrostrate and deflected ventrally. The axial area is narrow. The central area is rounded and asymmetric, about one half the valve width. The raphe is lateral, becoming filiform near the proximal and distal ends. Proximal raphe ends are weakly inflated and deflected dorsally. Distal raphe fissures are very prominent, comma-shaped, and concave toward the ventral side. Striae are radiate throughout.



Original Description

Basionym: Encyonopsis lacuscaerulei
Author: Bahls 2013
Length Range: 36-61 µm
Width Range: 5.5-6.8 µm
Striae in 10 µm: 17-20

Original Description

Valves linear, not or slightly dorsiventral, triundulate or with slightly concave dorsal and ventral margins. Apices subrostrate, deflected ventrally. Valve length 36–61 µm; valve width 5.5–6.8 µm. Axial area narrow. Central area rounded, asymmetric, about one half the valve width. Raphe lateral, filiform near the proximal and distal ends. Proximal raphe ends weakly inflated, deflected dorsally. Distal raphe fissures very prominent, comma-shaped, concave toward the ventral side. Striae radiate throughout, 17–20 in 10 µm.

Original Images


Cite This Page:
Bahls, L. (2013). Encyonopsis lacuscaerulei. In Diatoms of the United States. Retrieved October 24, 2014, from http://westerndiatoms.colorado.edu/taxa/species/Encyonopsis_lacuscaerulei

Species: Encyonopsis lacuscaerulei

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

Encyonopsis lacuscaerulei was collected from the benthos of two lower elevation lakes in northwest Montana. Here pH measured 8.0 and 8.3 and specific conductance measured 350 and 230 µS/cm.

Images

Savage Lake, Lincoln County, Montana: paratype locality of Encyonopsis lacuscaerulei.

Credit/Source: Loren Bahls