Navicula whitefishensis

Bahls 2012      Category: Symmetrical biraphid
BASIONYM: Navicula whitefishensis Bahls 2012

Navicula weberi

 

Navicula wildii

LM scalebar = 10 µm = 40 pixels.



Observations

Contributor: Loren Bahls - March 2013
Length Range: 46-60 µm
Width Range: 11.3-14.2 µm
Striae in 10 µm: 12-14

Description

Valves are broadly lanceolate with abruptly protracted, narrow subcapitate apices. The axial area is narrow, widening gradually toward a large, rounded central area. The central area is 6-8 μm in diameter. The raphe is filiform to weakly lateral. Proximal raphe ends expanded and weakly deflected to one side. Terminal raphe fissures are curved, opening toward the secondary side. Striae are strongly radiate throughout most of valve, becoming parallel then convergent only near the apices. Striae number 12-14 in 10 μm. Areolae number 28-30 in 10 μm.



Original Description

Basionym: Navicula whitefishensis
Author: Bahls 2012
Length Range: 46-60 µm
Width Range: 11.3-14.2 µm
Striae in 10 µm: 12-14

Original Description

Valves broadly lanceolate with abruptly protracted and narrow subcapitate apices. Length 46-60 μm, width 11.3-14.2 μm. Axial area narrow, gradually widening toward a very large, rounded central area. Central area 5.9-8.2 μm in diameter. Raphe filiform to weakly lateral. Proximal raphe ends relatively distant, expanded and weakly deflected to one side. Terminal raphe fissures curved, opening toward the secondary side. Lineolate striae radiate almost throughout, becoming parallel then convergent only very near the poles, 12-14 in 10 μm. Areolae rather indistinct under LM, 28-30 in 10 μm.

Original Images


Cite This Page:
Bahls, L. (2013). Navicula whitefishensis. In Diatoms of the United States. Retrieved July 25, 2014, from http://westerndiatoms.colorado.edu/taxa/species/navicula_whitefishensis

Species: Navicula whitefishensis

Contributor: Loren Bahls

Reviewer: Sarah Spaulding

Citations

Bahls, L. (2012). Navicula whitefishensis, a new diatom (Bacillariophyta) from the Northern Rockies. Intermountain Journal of Sciences 18(1-4): 1-5.

Links & ID's

Index Nominum Algarum (INA)

California Academy of Sciences (CAS)

North American Diatom Ecological Database (NADED)

NADED ID:

Autecology Discussion

Navicula whitefishensis is known only from two lakes in the Northern Rocky Mountains of Montana: Upper Whitefish Lake, Flathead County (holotype locality) and Redrock Lake in Glacier National Park. Here pH measured 7.4 and 7.1, respectively, and specific conductance measured 130 and 94 µS/cm, respectively.

Images

Redrock Lake, Glacier National Park, Montana: home of Navicula whitefishensis.

Credit/Source: Loren Bahls