Navicula supleeorum

Bahls 2013      Category: Symmetrical biraphid
BASIONYM: Navicula supleeorum Bahls 2013

Navicula subrostellata

 

Navicula symmetrica

LM scalebar = 10 µm = 80 pixels.



Observations

Contributor: Loren Bahls - November 2012
Length Range: 23-32 µm
Width Range: 6.1-7.0 µm
Striae in 10 µm: 12-14

Description

Valves are lanceolate in larger specimens, to elliptic-lanceolate in smaller specimens. Apices are acutely rounded, rounded in larger specimens and weakly apiculate in smaller specimens. The axial area is narrow, barely wider than the raphe and widening into a small, elliptic central area. The raphe is straight and weakly lateral, becoming filiform near the proximal and distal ends. The proximal raphe ends are dilated. The distal raphe fissures are hooked toward the secondary side. Striae are radiate, becoming parallel then weakly convergent at the apices. Alternate short-long-short striae are typical in the central area. Areolae are fine and number 30-32 in 10 µm.



Original Description

Basionym: Navicula supleeorum
Author: Bahls 2013
Length Range: 23-32 µm
Width Range: 6.1-7.0 µm
Striae in 10 µm: 12-14

Original Description

Valves lanceolate in larger specimens to elliptic-lanceolate in smaller specimens. Valve length 23–32 μm; valve width 6.1–7.0 μm. Apices acutely rounded, not protracted in larger specimens, weakly protracted in smaller specimens. Axial area narrow, barely wider than the raphe, widening into a small elliptic central area. Raphe straight and weakly lateral, becoming filiform near the proximal and distal ends. External proximal raphe ends dilated. Striae radiate, becoming parallel then weakly convergent at the apices, 12–14 in 10 μm. Alternate short-long-short striae typical in the central area. Areolae 30–32 in 10 μm.

Original Images


Cite This Page:
Bahls, L. (2012). Navicula supleeorum. In Diatoms of the United States. Retrieved July 22, 2014, from http://westerndiatoms.colorado.edu/taxa/species/navicula_supleeorum

Species: Navicula supleeorum

Contributor: Loren Bahls

Reviewer: Sarah Spaulding

Citations

Bahls, L. (2013). New diatoms (Bacillariophyta) from western North America. Phytotaxa 82(1): 7-28.

Lange-Bertalot, H. (2001). Navicula sensu stricto, 10 genera separated from Navicula sensu lato, Frustulia. Diatoms of Europe 2: 1-526.

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 supleeorum is known to date only from the type locality: Rock Creek in Valley County, Montana. It has probably been mistaken for and lumped with N. cryptotenella in biological surveys. On the date the type sample was collected, pH in Rock Creek measured 8.30 and specific conductance measured 1402 µS/cm.