Cymbellonitzschia diluviana

Hustedt 1950      Category: Nitzschioid
BASIONYM: Cymbellonitzschia diluviana Hustedt 1950

Cymbella turgidula

 

Cymbopleura amphicephala

LM scalebar = 10 µm = 80 pixels.



Observations

Contributor: Pat Kociolek - February 2011
Length Range: 8.5-25 µm
Width Range: 2-4 µm
Striae in 10 µm: 22-25

Description

Valves are half-lanceolate or half-elliptical, with the keel of the raphe positioned along the straight margin, rather than along the curved convex margin. The frustule has hantzschioid symmetry. Fibulae number 8-12 in 10 µm. Striae are visible, but are not punctate.

The genus was described from African material and is based on Cymbellonitzschia minima Hustedt, a taxon which has its keel located along the arched portion of the valve, and was described for a species in Africa. Cymbellonitzschia diluviana is present in late glacial sediments and rarely in Recent lake collections in Europe (Jewson and Lowry 1993). It is difficult to imagine the symmetry and raphe organization of the African species and the northern latitude species are part of the same monophyletic group.

In the US, this species is known from large, cool, clean water lakes and is often associated with psammic habitats.



Original Description

Basionym: Cymbellonitzschia diluviana
Author: Hustedt 1950
Length Range: µm
Striae in 10 µm:

Original Description

Cymbellonitzschia diluviana ΗUST., Taf. XLI, Fig. 56-60, gleichzeitig beschrieben in meiner Abhandlung über das Interglazial von Oberohe, sie bildet die wichtigste und eigentümliche Leitform. dieses Interglazials. Im Schaalsee rezent am Westufer des Priestersees, und zwar ziemlich häufig an Ceratophyllum und auf Sand, der in dünner Schicht den schwarzen Faulschlamm überdeckt. In einem der betreffenden Präparate, das zur Kontrolle durchgezählt wurde, konnten unter einem runden Deckglas von 12 mm Durchmesser 12 Individuen festgestellt werden, das ist mindestens derselbe Häufigkeitsgrad, vielfach sogar ein höherer, den die Art in den interglazialen Sedimenten von Oberohe zeigt. Die Form ist recht auffällig, wenn auch klein, und kann kaum übersehen werden. Sie scheint im allgemeinen ausgestorben zu sein, es besteht jedoch die Μöglichkeit, daß sie in einem der weiter östlich gelegenen Seen, die mit dem Schaalsee gleichen geologischen Alters sind, ebenfalls noch rezent vorkommt.

Original Images


Cite This Page:
Kociolek, P. (2011). Cymbellonitzschia diluviana. In Diatoms of the United States. Retrieved September 01, 2014, from http://westerndiatoms.colorado.edu/taxa/species/cymbellonitzschia_diluviana

Species: Cymbellonitzschia diluviana

Contributor: Pat Kociolek

Reviewer: Mark Edlund

Citations

Hustedt, F. (1950). Die Diatomeenflora norddeutscher Seen mit besonderer Berücksichtigung des holsteinischen Seengebiets V-VII. Seen in Mecklenburg, Lauenburg und Nordostdeutschland. Archiv für Hydrobiologie 43:329-458, Tafs 21-41.

Jewson, D.H. and Lowry, S. (1993). Cymbellonitzschia diluviana Hustedt (Bacillariophyceae): Habitat and auxosporulation. Hydrobiologia 269/270: 87-96.

Links & ID's

Index Nominum Algarum (INA)

Original INA

California Academy of Sciences (CAS)

Cymbellonitzschia diluviana CAS

North American Diatom Ecological Database (NADED)

NADED ID: 24001

Autecology Discussion

EMAP Assessment

The Environmental Protection Agency (EPA) western Environmental Monitoring and Assessment Program (EMAP) study was completed during the years 2000-2004 (see citations at bottom of this page). Over 1200 streams and rivers in 12 western states (Arizona, California, Colorado, Idaho, Montana, Nevada, North Dakota, Oregon, South Dakota, Utah, Washington and Wyoming) were selected for sampling based on a stratified randomized design. This type of design insures that ecological resources are sampled in proportion to their actual geographical presence. Stratified randomized design also allows for estimates of stream length with a known confidence in several “condition classes” (good or least-disturbed, intermediately-disturbed, and poor or most-disturbed) for biotic condition, chemistry and habitat.


EMAP Distribution

Cymbellonitzschia diluviana


EMAP Response Plots

Cymbellonitzschia diluviana


EMAP citations

Results are published in:

Johnson, T., Hermann, K., Spaulding, S., Beyea, B., Theel, C., Sada, R., Bollman, W., Bowman, J., Larsen, A., Vining, K., Ostermiller, J., Petersen, D. Hargett, E. and Zumberge, J. (2009). An ecological assessment of USEPA Region 8 streams and rivers. U.S. Environmental Protection Agency Region 8 Report, 178 p.

Stoddard, J. L., Peck, D. V., Olsen, A. R., Larsen, D. P., Van Sickle, J., Hawkins, C. P., Hughes, R. M., Whittier, T. R., Lomnicky, G. A., Herlihy, A. T., Kaufman, P. R., Peterson, S. A., Ringold, P. L., Paulsen, S. G., and Blair, R. (2005). Environmental Monitoring and Assessment Program (EMAP) western streams and rivers statistical summary. U.S. Environmental Protection Agency Report 620/R-05/006, 1,762 p.

Stoddard, J. L., Peck, D. V., Paulsen, S. G., Van Sickle, J., Hawkins, C. P., Herlihy, A. T., Hughes, R. M., Kaufman, P. R., Larsen, D. P., Lomnicky, G. A., Olsen, A. R., Peterson, S. A., Ringold, P. L., and Whittier, T. R. (2005). An ecological assessment of western streams and rivers. U.S. Environmental Protection Agency Report 620/R-05/005, 49 p.