Encyonopsis czarneckii

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

Encyonopsis cesatii

 

Encyonopsis dakotae

LM scalebar = 10 µm = 80 pixels.



Observations

Contributor: Loren Bahls - May 2013
Length Range: 19.6-30.1 µm
Width Range: 3.7-5.2 µm
Striae in 10 µm: 22-24 at the valve center, 24-26 near the apices

Description

Valves are linear-lanceolate and slightly dorsiventral with capitate apices. The axial area is narrow and near the valve midline. The central area is small and asymmetric, rounded on the dorsal side and defined by two or three unevenly shortened striae on the ventral side. The raphe is weakly lateral, narrowing near the proximal and distal ends. Proximal raphe ends are weakly expanded and deflected dorsally. Distal raphe fissures are hooked toward the ventral side. Striae are radiate throughout.



Original Description

Basionym: Encyonopsis czarneckii
Author: Bahls 2013
Length Range: 19.6-30.1 µm
Width Range: 3.7-5.2 µm
Striae in 10 µm: 22-24 at valve center, 24-26 near the apices

Original Description

Valves linear-lanceolate, slightly dorsiventral. Apices capitate. Valve length 19.6–30.1 µm; valve width 3.7–5.2 µm. Axial area narrow, near valve midline. Central area small, asymmetric, rounded on the dorsal side, defined by two unevenly shortened striae on the ventral side. Raphe weakly lateral, filiform near the proximal and distal ends. Proximal raphe ends weakly expanded, deflected dorsally. Distal raphe fissures hooked toward the ventral side. Striae radiate throughout, 22–24 in 10 µm at valve center, 24–26 in 10 µm near the apices.

Original Images


Cite This Page:
Bahls, L. (2013). Encyonopsis czarneckii. In Diatoms of the United States. Retrieved September 16, 2014, from http://westerndiatoms.colorado.edu/taxa/species/encyonopsis_czarneckii

Species: Encyonopsis czarneckii

Contributor: Loren Bahls

Reviewer: Mark Edlund

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 czarneckii is widely distributed and locally abundant in lakes of the northern Rocky Mountains. The type locality is Lake McDonald in Glacier National Park (photo below). On the date the type sample was collected, Lake McDonald had a pH of 8.7 and specific conductance of 92 µS/cm.

Images

Lake McDonald, Glacier National Park, Montana: type locality of Encyonopsis czarneckii.

Credit/Source: Glacier National Park webcam.