Eunotia paludosa
Grunow 1862 Category: Eunotioid
BASIONYM: Eunotia paludosa Grunow 1862
SYNONYM(S): Himantidium paludosum (Grunow) Lagerstedt 1873
LM scalebar = 10 µm = 80 pixels.
Observations
Contributor: Paula Furey - March 2012
Length Range: 14.5-47.5 µm
Width Range: 2.2-3.7 µm
Striae in 10 µm: 18-22 in the center valve
Description
Frustules are narrowly rectangular in girdle view. In valve view,valves are weakly curved. Ventral margins are straight in smaller specimens and moderately concave in mid-size to large specimens. Ventral margins of larger specimens with barely visible swellings marking the position of the proximal raphe ends (difficult to discern in smaller valves). The dorsal margins are convex. Valve apices are rounded and slightly dorsally reflexed. Helictoglossae are located close to the apices. Striae are parallel. The areolae are unresolved in the LM. Spines are absent.
Original Description
Basionym: Eunotia paludosa
Author: Grunow 1862
Length Range: µm
Striae in 10 µm:
Original Description
Original Images
Cite This Page:
Furey, P. (2012). Eunotia paludosa. In Diatoms of the United States. Retrieved May 25, 2013, from http://westerndiatoms.colorado.edu/taxa/species/eunotia_paludosa
Species: Eunotia paludosa
Contributor: Paula Furey
Reviewer: Marina Potapova
Image Credit: Paula Furey
- Valves weakly curved
- Ventral margin concave
- Ventral margin with subapical swellings
- Apices rounded, slightly reflexed
Valves are weakly curved. Ventral margins are straight in smaller specimens and moderately concave in mid-size to large specimens. Ventral margins of larger specimens with barely visible swellings marking the position of the proximal raphe ends. Valve apices are rounded and slightly dorsally reflexed.
Compare
The morphology of E. paludosa is similar to E. trinacria. Valves of E. trinacria are narrower and have a central undulation on the dorsal margin that is absent in E. paludosa. Valves of E. paludosa are sometimes confused with forms of E. exigua and E. tenella. The apices of E. paludosa are narrowly protracted and are not as strongly dorsally recurved as the capitate, dorsally recurved apices of E. exigua. Valves of E. paludosa have a more evenly curved dorsal margin and a more convex ventral margin than valves of E. tenella, where the dorsal and ventral margins are nearly parallel. The dorsal margin ends in a ‘shoulder’ near the apices and the ventral margin is straighter in E. tenella.
Eunotia trinacria
Eunotia exigua
Eunotia tenella
Citations
Grunow, A. (1862). Die österreichischen Diatomaceen nebst Anschluss einiger neuen Arten von andern Lokalitäten und einer kritischen Uebersicht der bisher bekannten Gattungen und Arten. Erste Folge. Epithemieae, Meridioneae, Diatomeae, Entopyleae, Surirelleae, Amphipleureae. Zweite Folge. Familie Nitzschieae. Verhandlungen der Kaiserlich-Königlichen Zoologisch-Botanischen Gesellschaft in Wien 12: 368, Pl. 7, fig. 8.
Links & ID's
Index Nominum Algarum (INA)
California Academy of Sciences (CAS)
North American Diatom Ecological Database (NADED)
NADED ID: 33083
Autecology Discussion
EMAP Assessment
Sampling for 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). Streams and rivers in 12 western states (Arizona, California, Colorado, Idaho, Montana, Nevada, North Dakota, Oregon, South Dakota, Utah, Washington and Wyoming). Over 1200 sites on 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
Eunotia paludosa
Distribution
The distribution map represents the relative abundance of this Eunotia paludosa in the western EMAP study. Relative abundance is a measure of the proportion of cells of this species based on a "fixed count" of 300 total diatom cells counted and identified. Each of the western EMAP sample sites is shown, either with a black dot for sites where Eunotia paludosa was not recorded, or with a red circle indicating the relative abundance of Eunotia paludosa.
Note that the size of the proportional symbols varies between species to help show both abundant and rare species.
Scale for the map to the left
EMAP Response Plots
Eunotia paludosa
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.