Navicula galloae

Bahls 2011      Category: Symmetrical biraphid
BASIONYM: Navicula galloae Bahls 2011

Navicula freesei

 

Navicula germainii

LM scalebar = 10 µm = 40 pixels.



Observations

Contributor: Loren Bahls - December 2011
Length Range: 85-113 µm
Width Range: 12.0-14.0 µm
Striae in 10 µm: 10-11

Description

Valves are narrowly lanceolate with gradually attenuated and rounded ends. The axial area is narrow and linear. The central area is small, rounded, and asymmetric, larger on the secondary side. The central nodule is asymmetric and wider on the primary side. The raphe is filiform to weakly lateral. Proximal raphe raphe fissures end in small hooks, which are deflected slightly to the secondary side. Each hook is divided at its center by a narrow tongue of silica. Striae are radiate, becoming parallel and finally convergent toward the ends. Areolae are relatively coarse and constant in number at 24 in 10 µm.



Original Description

Basionym: Navicula galloae
Author: Bahls 2011
Length Range: 85-113 µm
Width Range: 12.0-14.0 µm
Striae in 10 µm: 10-11

Original Description

Valves narrowly linear-lanceolate with gradually attenuated and rounded apices. Length 85-113 μm, width 12.0-14.0 μm. Axial area narrow, central area small, rounded, and somewhat asymmetric, larger on the secondary side. Raphe filiform to weakly lateral. Central raphe fissures end in small bifurcated pores, which are deflected slightly to the secondary side (Figure 2G, I); distal raphe fissures hooked, the hooks opening toward the secondary side. Striae radiate, becoming parallel and finally convergent toward the ends, 10-11 in 10 μm. Areolae relatively coarse (more so than in N. radiosa Kützing) and fairly constant at 24 in 10 μm, visible in LM.

Original Images


Cite This Page:
Bahls, L. (2011). Navicula galloae. In Diatoms of the United States. Retrieved November 22, 2014, from http://westerndiatoms.colorado.edu/taxa/species/navicula_galloae

Species: Navicula galloae

Contributor: Loren Bahls

Reviewer: Marina Potapova

Citations

Bahls, L.L. (2011). Three new species of Navicula (Bacillariophyta) from Oregon and Montana and a review of diatom endemism in the Northwest. Northwest Science 85 (4): 517-526.

Links & ID's

Index Nominum Algarum (INA)

Original INA

California Academy of Sciences (CAS)

North American Diatom Ecological Database (NADED)

NADED ID:

Autecology Discussion

Navicula galloae has been recorded at three sampling stations on Snow Creek, a headwater tributary of the Deschutes River, and in the North Umpqua River, all in the Cascade Mountains of western Oregon. These streams have slightly alkaline waters (pH ranges from 6.9 to 7.6) and low concentrations of dissolved solids (specific conductance ranges from 24 to 53 µS/cm).

Images

Snow Creek, Deschutes County, Oregon: type locality for Navicula galloae

Credit/Source: U. S. Forest Service