Nupela wellneri

(Lange-Bertalot in Lange-Bertalot and Krammer) Lange-Bertalot in Rumrich, Lange-Bertalot and Rumrich 2000      Category: Symmetrical biraphid
BASIONYM: Navicula wellneri Lange-Bertalot in Lange-Bertalot and Krammer 1987

Nupela vitiosa

 

Pinnularia divergentissima

LM scalebar = 10 µm = 80 pixels.



Observations

Contributor: Marina Potapova - October 2010
Length Range: 8.5-15 µm
Width Range: 3.0-4.5 µm
Striae in 10 µm: 38-42

Description

Valves are lanceolate with subcapitate to capitate apices. The valves are often slightly bent in valvar plane about the apical axis and about the median transapical plane. The raphe is almost straight. External terminal raphe fissures are strongly curved. The raphe slits are slightly shorter and the distance between central raphe endings is greater on the convex valve than on the concave valve. Striae are radiate throughout most of the valve, but become parallel or slightly convergent near the poles, 38-42 in 10 mm. Areolae are small, round, externally covered by hymens. Axial area is large, rhomboid, continuous with central area, which sometimes possesses a few isolated areolae.



Original Description

Basionym: Navicula wellneri
Author: Lange-Bertalot in Lange-Bertalot and Krammer 1987
Length Range: 12-14 µm
Width Range: 4-4.8 µm
Striae in 10 µm: 50

Original Description

Schalen lanzettlich mit schnabelartig vorgezogenen, stumpf bis sehr schwach kopfig gerundeten Enden, Länge 12-14 μm, Breite 4-4,8 μm. Raphe fadenförmig mit auffällig weit voneinander entfernten Zentralporen. Axial- und Zentralarea verschmelzen in Schalenmitte zu einer weiten hyalinen Fläche, in den Schnäbeln ist die Axialarea linear und ziemlich breit. Str. im LM nur bei schiefer Beleuchtung undeutlich erkennbar, weil in Schalenmitte sehr kurz, randständig. Im REM: Str. bei verschiedenen Exemplaren ungleich stark verkürzt, um 45/10 μm, Areolen klein und rundlich, in vergleichsweise weiten und unregel-mäβigen Abständen voneinander, um 50/10 μm. Zentralknoten als flache Massenanhäufung zwischen den Raphenästen erkennbar.

Original Images


Cite This Page:
Potapova, M. (2010). Nupela wellneri. In Diatoms of the United States. Retrieved August 21, 2014, from http://westerndiatoms.colorado.edu/taxa/species/nupela_wellneri

Species: Nupela wellneri

Contributor: Marina Potapova

Reviewer: Sarah Spaulding

Citations

Lange-Bertalot, H. and Krammer, K. (1987). Bacillariaceae Epithemiaceae Surirellaceae. Neue und wenig bekannte Taxa, neae Kombinationen und Synonyme sowie Bemerkungen und Erganzungen zu den Naviculaceae. Bibliotheca Diatomologica 15:289 pp.

Potapova, M., Ponander, K.C., Lowe, R.L., Clason, T.A. and Bahls, L.L. (2003). Small-celled Nupela speces from North America. Diatom Research 18: 293-306.

Rumrich, U., Lange-Bertalot, H. and Rumrich, M. (2000). Diatoms of the Andes. From Venezuela to Patagonia/Tierra del Fuego and two additional contributions. Lange-Bertalot, H. (ed.), Iconographia Diatomologica. Annotated Diatom Micrographs. Vol. 9. Phytogeography-Diversity-Taxonomy. Koeltz Scientific Books, Königstein, Germany, 9:673 pp.

Scherer, R.P. (1988). Freshwater diatom assemblages and ecology/paleoecology of the Okefenokee swamp/marsh complex, Southern Georgia, U.S.A. Diatom Research 3: 129-157.

Links & ID's

Index Nominum Algarum (INA)

California Academy of Sciences (CAS)

Nupela wellneri CAS

North American Diatom Ecological Database (NADED)

NADED ID: 92007

Autecology Discussion