Navicula seibigiana

Lange-Bertalot 1993      Category: Symmetrical biraphid
BASIONYM: Navicula seibigiana Lange-Bertalot 1993

REPORTED AS: Navicula species 3 (Krammer and Lange-Bertalot 1986, Fig. 38: 21) | Navicula seibigii (Krammer and Lange-Bertalot 1991 & 2004, Fig. 63: 1-6) 

Navicula schweigeri

 

Navicula slesvicensis

LM scalebar = 10 µm = 80 pixels.



Observations

Contributor: Loren Bahls - April 2012
Length Range: 26-29 µm
Width Range: 5.2-5.8 µm
Striae in 10 µm: 11-12

Description

Valves are lanceolate with slightly protracted, broadly rounded apices. The axial area is narrow and linear. The central area is small and bordered on each side by one or two short striae. The raphe is filiform with inflated proximal ends. Striae are robust, strongly radiate in the middle, becoming abruptly parallel then convergent near the ends. Areolae are fine and number 34-38 in 10 µm.



Original Description

Basionym: Navicula seibigiana
Author: Lange-Bertalot 1993
Length Range: 25-35 µm
Width Range: 5.5-6.5 µm
Striae in 10 µm: 9-11

Original Description

Valves elliptic-lanceolate to linear-lanceolate, ends often slightly protracted for a short distance, very obtusely to almost broadly rounded, length 25-35 µm, breadth 5.5-6.5 µm. Raphe branches filiform with very distinct central pores. Axial area narrow, linear, central area irregularly bordered on both sides due to the shortening of one or two striae, almost rectangular, only slightly enlarged. Striae fairly strongly radiate in the middle, then abruptly parallel, becoming convergent, 9-11/10 µm; lineolae c. 36/10 µm.

Original Images


Cite This Page:
Bahls, L. (2012). Navicula seibigiana. In Diatoms of the United States. Retrieved July 25, 2014, from http://westerndiatoms.colorado.edu/taxa/species/navicula_seibigiana

Species: Navicula seibigiana

Contributor: Loren Bahls

Reviewer: Sarah Spaulding

Citations

Krammer, K. and Lange-Bertalot, H. (1986). Bacillariophyceae. 1. Teil: Naviculaceae. In: Ettl, H., J. Gerloff, H. Heynig and D. Mollenhauer (eds.) Susswasserflora von Mitteleuropa, Band 2/1. Gustav Fisher Verlag, Jena. 876 pp.

Krammer, K. and Lange-Bertalot, H. (2004). Bacillariophyceae 4. Teil: Achnanthaceae, Kritische Erganzungen zu Navicula (Lineolatae), Gomphonema Gesamtliteraturverzeichnis Teil 1-4 [second revised edition]. In: H. Ettl et al., Suesswasserflora von Mitteleuropa. Spektrum Akademischer Verlad Heidelberg, 468 pp.

Lange-Bertalot, H. (1993). 85 Neue taxa und uber 100 weitere neu definierte Taxa erganzend zur Subwasserflora von Mittleuropa. Bibliotheca Diatomologica 27, 454 p. Cramer, Berlin, Stuttgart.

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)

Navicula seibigiana CAS

North American Diatom Ecological Database (NADED)

NADED ID: 46870

Autecology Discussion

Navicula seibigiana has been recorded from 55 ponds and small streams in the Pacific Northwest, where it is present in small numbers. In these waters mean water temperature is 9.3 degrees C, mean pH is 7.6, and mean specific conductance is 120 µS/cm.

Images

Blakiston Beaver Pond A, Waterton Lakes National Park, Alberta: home of Navicula seibigiana.

Credit/Source: Barb Johnston, Parks Canada.