Pinnularia rabenhorstii

(Grunow) Krammer 2000      Category: Symmetrical biraphid
BASIONYM: Navicula rabenhorstii Grunow 1860
SYNONYM(S): Pinnularia lata var. rabenhorstii (Grunow) Cleve 1895 

Pinnularia polyonca

 

Pinnularia rhombarea

LM scalebar = 10 µm = 40 pixels.



Observations

Contributor: Loren Bahls - March 2014
Length Range: 50-71 µm
Width Range: 12.1-17.9 µm
Striae in 10 µm: 4-5

Description

Valves are linear with moderately convex margins. Apices are bluntly rounded. The axial area is narrow. The central area is small to moderately large, rounded, and somewhat asymmetric. The raphe is lateral and straight. Proximal raphe ends are bent to one side and tipped with inflated pores. Distal raphe ends are hook- or sickle-shaped. The broad striae are weakly radiate at the valve center, becoming parallel at the apices.



Original Description

Basionym: Navicula rabenhorstii
Author: Grunow 1860
Length Range: µm
Striae in 10 µm:

Original Description

Original Images


Cite This Page:
Bahls, L. (2014). Pinnularia rabenhorstii. In Diatoms of the United States. Retrieved March 25, 2017, from http://westerndiatoms.colorado.edu/taxa/species/pinnularia_rabenhorstii

Species: Pinnularia rabenhorstii

Contributor: Loren Bahls

Reviewer: Rex Lowe

Citations

Cleve, P.T. (1895). Synopsis of the Naviculoid Diatoms, Part II. Kongliga Svenska-Vetenskaps Akademiens Handlingar 27(3):1-219.

Grunow, A. (1860). Uber neue oder ungenügend gekannte Algen. Verhandlungen der Kaiserlich-Königlichen Zoologisch-Botanischen Gesellschaft in Wein, 10: 503-582.

Krammer, K. (2000). The genus Pinnularia. The Diatoms of Europe. Diatoms of Inland Waters and Comparable Habitats 1: 1-703.

Links & ID's

Index Nominum Algarum (INA)

Transfer INA

California Academy of Sciences (CAS)

Pinnularia rabenhorstii CAS

North American Diatom Ecological Database (NADED)

NADED ID:

Autecology Discussion

Pinnularia rabenhorstii prefers cold oligotrophic waters in the mountains (Krammer 2000). This species is uncommon in collections from the Northwest United States. The seven specimens pictured on this web page were collected from seven different lakes and ponds, all but one of them within a few kilometers of the Canadian border. At these sites pH ranged from 7.34 to 8.81 and specific conductance ranged from 12 to 31 µS/cm.

Images

Loudon Lake, Okanogan County, Washington: home of Pinnularia rabenhorstii.

Credit/Source: Ryan Davis, Adventurers and Scientists for Conservation.

Boundary Trail Pond No. 3, Okanogan County, Washington: home of Pinnularia rabenhorstii.

Credit/Source: Ryan Davis, Adventurers and Scientists for Conservation.