Navicula harmoniae

Bahls 2014      Category: Symmetrical biraphid
BASIONYM: Navicula harmoniae Bahls 2014

Navicula gregaria

 

Navicula hodgeana

LM scalebar = 10 µm = 40 pixels.



Observations

Contributor: Loren Bahls - January 2016
Length Range: 33-68 µm
Width Range: 8.1-10.2 µm
Striae in 10 µm: 9-13 at valve center, 13-16 near the apices

Description

Valves are lanceolate with narrowly rounded apices. The axial area widens gradually from apex to valve center where it merges with a rhombic central area. The axial and central areas form a narrow lanceolate space. The raphe is filiform and lies along the center of the axial area. Proximal raphe ends are expanded and deflected slightly toward the secondary side of the valve. Striae are sinuous and strongly radiate near the valve center, becoming straight and parallel near the apices. Striae around the central area are alternately long and short and more widely spaced than striae near the apices. Areolae in the striae number 30-35 in 10 μm.



Original Description

Basionym: Navicula harmoniae
Author: Bahls 2014
Length Range: 33.0-68.1 µm
Width Range: 8.1-10.2 µm
Striae in 10 µm: 9-13 at valve center, 13-16 near the apices

Original Description

Valves are lanceolate with weakly protracted apices in smaller specimens. Valve length 33.0-68.1 μm; valve width 8.1-10.2 μm. The axial area widens gradually from apex to valve center where it merges with a rhombic central area. Together, the axial and central areas form a narrow lanceolate space. The raphe is filiform and lies along the center of the axial area. Terminal raphe fissures form hooks that open towards the secondary side of the valve. Proximal raphe ends are expanded and deflected slightly toward the secondary side of the valve. Striae are sinuous and radiate near the valve center, becoming straight and parallel near the apices. Voigt faults are distinct and often marked by short striae. Striae around the central area are alternately long and short and more widely spaced than striae near the apices. Striae number 9-13 in 10 μm at valve center, 13-16 in 10 μm near the apices. Arolae in the striae number 30-35 in 10 μm.

Original Images


Cite This Page:
Bahls, L. (2016). Navicula harmoniae. In Diatoms of the United States. Retrieved March 23, 2017, from http://westerndiatoms.colorado.edu/taxa/species/navicula_harmoniae

Species: Navicula harmoniae

Contributor: Loren Bahls

Reviewer: Marina Potapova

Citations

Bahls, L. (2014). New diatoms from the American West–A tribute to citizen science. Proceedings of the Academy of Natural Sciences of Philadelphia 163: 61-84.

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 harmoniae is known only from the type locality, a spring in the mountains of northern California.