Neidiopsis weilandii

Bahls 2014      Category: Symmetrical biraphid
BASIONYM: Neidiopsis weilandii Bahls 2014

Neidiopsis levanderi

 

Neidiopsis wulffii

LM scalebar = 10 µm = 80 pixels.



Observations

Contributor: Loren Bahls - November 2015
Length Range: 39-65 µm
Width Range: 9.0-11.4 µm
Striae in 10 µm: 18-20

Description

Valves are linear with weakly convex, nearly parallel margins. Apices are cuneate to subrostrate and broadly rounded. The axial area is narrow and widens gradually toward the valve center, where it merges with a small rhomboidal central area. The raphe is filiform, with slightly expanded proximal ends that are deflected toward the secondary side. Distal raphe fissures are curved towards the same side as the proximal raphe ends. Striae are radiate at the valve center, becoming parallel and finally convergent near the apices. Areolae in the striae are very fine. A wide hyaline longitudinal line runs along the valve margin from apex to apex.



Original Description

Basionym: Neidiopsis weilandii
Author: Bahls 2014
Length Range: 39.4-65.1 µm
Width Range: 9.0-11.4 µm
Striae in 10 µm: 18-20

Original Description

Valves are linear with weakly convex, nearly parallel margins. Valve length 39.4–65.1μm, valve width 9.0–11.4μm. Apices are cuneate to subrostrate and broadly rounded. The axial area is narrow and widens gradually towards the valve center where it merges with a small rhomboidal central area. The raphe is filiform with slightly expanded proximal ends that are bent toward the secondary side. Distal raphe fissures are curved toward the same side, as are the proximal raphe ends. Striae are radiate at the valve center, becoming parallel and finally convergent near the apices. Stria density 18–20 in 10μm; areolae in the striae are very fine. A wide hyaline line runs along the valve margin from apex to apex. Plastids were not observed.

Original Images


Cite This Page:
Bahls, L. (2015). Neidiopsis weilandii. In Diatoms of the United States. Retrieved October 22, 2017, from http://westerndiatoms.colorado.edu/taxa/species/neidiopsis_weilandii

Species: Neidiopsis weilandii

Contributor: Loren Bahls

Reviewer: Sarah Spaulding

Citations

Bahls, L.L. (2014). Neidiopsis hamiltonii sp. nov., N. weilandii sp. nov., N. levanderi and N. wulffii from western North America. Diatom Research. 10.1080/0269249X.2014.889606

Links & ID's

Index Nominum Algarum (INA)

Original INA

California Academy of Sciences (CAS)

North American Diatom Ecological Database (NADED)

NADED ID:

Autecology Discussion

Neidiopsis weilandii has been recorded from a small alpine lake in Washington (2060 m a.s.l.), from a small subalpine lake in Glacier National Park, Montana (1341 m a.s.l.), and from the marshy tributary of another subalpine lake in northwest Montana (1700 m a.s.l.). Water chemistry at the Washington locality is unknown but the lake probably has circumneutral pH and low concentrations of nutrients and dissolved solids. The pH of the lake in Glacier National Park was 8.3 and the specific conductance was 112μS cm−1. The marshy tributary of the subalpine lake in northwest Montana had a pH of 8.5 and a specific conductance of 181 μS cm−1.

Images

Lake Edna, Wenatchee National Forest, Chelan County, Washington: Type locality for Neidiopsis weilandii.

Credit/Source: Craig Weiland