Rhoicosphenia abbreviata

(Agardh) Lange-Bertalot 1980      Category: Asymmetrical biraphid
BASIONYM: Gomphonema abbreviatum Agardh 1831
SYNONYM(S): Gomphonema abbreviatum Agardh | Rhoicosphenia curvata (Kützing) Grunow 

Rexlowea navicularis

 

Rhopalodia gibba

LM scalebar = 10 µm = 80 pixels.



Observations

Contributor: Marina Potapova - May 2009
Length Range: 10–55 µm
Width Range: 3–8 µm
Striae in 10 µm: 15-20

Description

Cells occur on stalks, forming colonies. Frustules are heteropolar, bent in girdle view. Valves are linear-lanceolate, 3-8 µm wide, 10-55 µm long. The ventral valve is concave, with a fully developed raphe system. The dorsal valve is convex, with short raphe slits situated close to the poles. A pseudoseptum is present at both poles on valve margins. Striae are uniseriate, 15-20 in 10 µm. Areolae are apically elongated.



Original Description

Basionym: Gomphonema abbreviatum
Author: Agardh 1831
Length Range: µm
Striae in 10 µm:

Original Description

G. abbreviatum, pedunculo subramoso cymbellis conicis fastigiatis breviore.

Original Images


Cite This Page:
Potapova, M. (2009). Rhoicosphenia abbreviata. In Diatoms of the United States. Retrieved October 21, 2014, from http://westerndiatoms.colorado.edu/taxa/species/Rhoicosphenia_abbreviata

Species: Rhoicosphenia abbreviata

Contributor: Marina Potapova

Reviewer: Sam Rushforth

Citations

Agardh, C.A. (1831). Conspectus Criticus Diatomacearum. Part 3. Lundae. Litteris Berlingianis. pp. 33-48.

Lange-Bertalot, H. (1980). Ein Beitrag zur Revision der Gattungen Rhoicosphenia Grun., Gomphonema C. Ag., Gomphoneis Cl. Botaniska Notiser 133:585-594.

Mann, D.G. (1982). Structure, life history and systematics of Rhoicosphenia (Bacillariophyta) I. The vegetative cell of Rh. curvata. Journal of Phycology 18: 162-176.

Mann, D.G. (1982). Structure, life history and systematics of Rhoicosphenia (Bacillariophyta) II. Auxospore formation and perizonium structure of Rh. curvata. Journal of Phycology 18: 264-274.

Mann, D.G. (1984). Structure, life history and systematics of Rhoicosphenia (Bacillariophyta) V. Initial cell and size reduction in Rh. curvata and description of of the Rhoicospheniaceae fam. nov. Journal of Phycology 20: 544-555.

Links & ID's

Index Nominum Algarum (INA)

Transfer INA
Original INA

California Academy of Sciences (CAS)

Rhoicosphenia abbreviata CAS

North American Diatom Ecological Database (NADED)

NADED ID: 57002

Autecology Discussion

fresh water of high ionic content or brackish water

Images

Rhoicosphenia abbreviata on Cladophora filament, Lake Okoboji, Iowa

Credit/Source: Marina Potapova

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

Rhoicosphenia abbreviata


EMAP Response Plots

Rhoicosphenia abbreviata


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.