Odontidium hyemale

(Roth) Kütz. 1844      Category: Araphid
BASIONYM: Conferva hyemalis Roth 1800
SYNONYM(S): Fragilaria hyemalis (Roth) Lyngb. 1819 | Candollella hyemalis (Roth) Gaillon 1833 | Diatoma hyemale (Roth) Heib. 1863 

Nupela wellneri


Odontidium mesodon

LM scalebar = 10 µm = 80 pixels.


Contributor: Ian Bishop - July 2017
Length Range: 17-51 µm
Width Range: 6.6-10.6 µm
Striae in 10 µm: 24-28


Valves are narrow and lanceolate, with broadly rounded apices. Apices are protracted in longer specimens. Striae are parallel to weakly radiate. Costae are parallel to diagonal, or slanted. Most of the costae are primary, but secondary costae are also present. Costae number 3-5 in 10 um. The axial area is linear to lanceolate, increasing in breadth as cells decrease in size. The sternum is distinct and extends into the apical porefields at both apices. Spines are present at the valve mantle-face boundary. A single rimoportula is present, most often near one end, but in some specimens the rimoportula is nearer to mid-valve.

Original Description

Basionym: Conferva hyemalis
Author: Roth 1800
Length Range: µm
Striae in 10 µm:

Original Description

  1. CONFERVA hyemalis.

C. filis mucilaginofis, geniculatis, fimplicibus tenuiffimis ferrugineis, ficcitate grifea-virefcentibus fragiliffimis: geni-geniculus obfcuris; articulis breuibus, cylindricis, cancellato-pellucidis. Roth Flora Germ. Tom. 3. Pars I. n. 22.

Original Images

Cite This Page:
Bishop, I. (2017). Odontidium hyemale. In Diatoms of the United States. Retrieved April 19, 2018, from http://westerndiatoms.colorado.edu/taxa/species/odontidium_hyemalis

Species: Odontidium hyemale

Contributor: Ian Bishop

Reviewer: David Williams


Bishop, I.W. and Spaulding, S.A. (2015). Tetracyclus hinziae (Bacillariophyta), a new species from the central Cascade Mountains (WA, USA). Phytotaxa 205(3): 197-204. 10.11646/phytotaxa.205.3.7

Cantonati, M. (2001). The diatom communities of the liverwort Chiloscyphus polyanthos var. rivularis in a mountain spring-fed stream in the Adamello-Brenta Regional Park (Northern Italy). In: Lange-Bertalot-Festschrift. Studies on Diatoms (Jahn, R., JP, Kociolek, A. Witkowski & P. Compere, eds), ARG Gantner Verlag KG, Ruggell, 353-368.

Heiberg, P.A.C. (1863). Conspectus criticus Diatomacearum Danicarum. Kritisk Oversigt over De Danske Diatomeer. Wilhelm Priors Forlag, Kjøbenhavn, 135 pp.

Jüttner, I., Williams, D.M., Levkov, Z., Falasco, E., Battegazzore, M., Cantonati, M., Van de Vijver, B., Angele, C. and Ector, L. (2015). Reinvestigation of the type material for Odontidium hyemale (Roth) Kützing and related species, with description of four new species in the genus Odontidium (Fragilariaceae, Bacillariophyta). Phytotaxa. http://dx.doi.org/10.11646/phytotaxa.234.1.1

Lyngbye, H.C. (1819). Tentamen Hydrophytologiae Danicae Continens omnia Hydrophyta Cryptogama Daniae, Holsatiae, Faeroae, Islandiae, Groenlandiae hucusque cognita, Systematice Disposita, Descripta et iconibus illustrata, Adjectis Simul Speciebus Norvegicis. Hafniae. 248 pp.

Williams, D.M. (1985). Morphology, taxonomy and inter-relationships of the ribbed araphid diatoms from the genera Diatoma and Meridion (Diatomaceae: Bacillariophyta). Bibliotheca Diatomologica 8: 1-228.

Links & ID's

Index Nominum Algarum (INA)

Original INA

California Academy of Sciences (CAS)

NCBI Genbank Taxonomy

Diatoma hyemalis NCBI

North American Diatom Ecological Database (NADED)


Autecology Discussion

Odontidium hyemale has been encountered throughout the western US in cool, oligotraphic subalpine streams. The valves imaged for this page were collected from streams in the foothills of the Olympic and Cascade Mountains of Washington, as well a heavily canopied alpine stream in the New Mexican Sangre de Cristos Mountains. Montane stream liverworts are a common habitat for this taxon, where it co-occurs with other costate taxa, such as Tetracyclus, Meridion, and Diatoma (Bishop and Spaulding 2015, Cantonati 2001).

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

Odontidium hyemale

EMAP Response Plots

Odontidium hyemale

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.