Gomphonema C.G. Ehrenberg; 1832; 87
Key references
Levkov Z., Mitic-Kopanja D., Reichardt E. 2016. The diatom genus Gomphonema from the Republic of Macedonia. Lange-Bertalot H. (ed.) Diatoms of Europe, Vol. 8, Koeltz Botanical Books, Oberreifenberg. 552 pp
Morphology
Valves clavate, rhombic, sometimes almost linear, sometimes with a gibbous centre, frustules in girdle view rectangular or wedge-shaped. Head pole wider than foot pole, rounded, (sub-)rostrate or capitate.
Valves asymmetrical to transapical axis (heteropolar) and symmetrical to apical axis.
Striae parallel to radiate, often coarse. Striae in the valve centre can be shortened and/or wider spaced. A single stigma (occasionally more) can be present on one side of the central area.
An apical pore field is present at the foot pole and bisected by the raphe.
Axial and central areas vary in width and shape: the axial area can be narrow linear, oval or broadly lanceolate, the central area can be absent, round, rectangular, an acute-angled fascia or subfascia, or it is asymmetrical due to the shortening or absence of the central striae on one side.
Striae uni- or biseriate with areolae small and round or c-shaped due to occlusion with reniform volae.
Raphe sternum straight and central, raphe straight or slightly sinuous. External proximal raphe endiungs often expanded, internally deflected or hooked towards the primary side of the valve; distal raphe fissure straight or sinuous.
Girdle consisting of several open bands with one or several rows of pores.
There is a single complex chloroplast with a central pyrenoid lying against one side of the girdle, linking two H-shaped plates lying below the valves.
Valves asymmetrical to transapical axis (heteropolar) and symmetrical to apical axis.
Striae parallel to radiate, often coarse. Striae in the valve centre can be shortened and/or wider spaced. A single stigma (occasionally more) can be present on one side of the central area.
An apical pore field is present at the foot pole and bisected by the raphe.
Axial and central areas vary in width and shape: the axial area can be narrow linear, oval or broadly lanceolate, the central area can be absent, round, rectangular, an acute-angled fascia or subfascia, or it is asymmetrical due to the shortening or absence of the central striae on one side.
Striae uni- or biseriate with areolae small and round or c-shaped due to occlusion with reniform volae.
Raphe sternum straight and central, raphe straight or slightly sinuous. External proximal raphe endiungs often expanded, internally deflected or hooked towards the primary side of the valve; distal raphe fissure straight or sinuous.
Girdle consisting of several open bands with one or several rows of pores.
There is a single complex chloroplast with a central pyrenoid lying against one side of the girdle, linking two H-shaped plates lying below the valves.
Literature
References are given in chronological order.
Reference |
Citation |
|---|---|
| Ehrenberg C.G. 1832. Über die Entwicklung und Lebensdauer der Infusionsthiere; nebst ferneren Beiträgen zu einer Vergleichung ihrer organischen Systeme. 1831. Abhandlungen der Königlichen Akademie der Wissenschaften zu Berlin. 1-154 pp; 4 pls | Description; Morphology |
| Kociolek J. P., Stoermer E. F. 1988. A Preliminary Investigation of the Phylogenetic Relationships Among the Freshwater, Apical Pore Field-Bearing Cymbelloid and Gomphonemoid Diatoms (Bacillariophyceae). Journal of Phycology. 24: 377-385. | Morphology; Biology |
| Round F.E., Crawford R.M., Mann D.G. 1990. The Diatoms. Biology & Morphology of the Genera. Cambridge University Press, Cambridge. 747 pp | Morphology; Illustrations |
| Kociolek J. P., Stoermer E. F. 1991. Taxonomy and ultrastructure of some Gomphonema and Gomphoneis taxa from the upper Laurentian Great Lakes. Canadian Journal of Botany. 69: 1557-1576. | Morphology; Illustrations |
| Kociolek J. P., Stoermer E. F. 1993. Freshwater gomphonemoid diatom phylogeny: preliminary results. Hydrobiologia. 269/270: 31-38. | Biology; Morphology |
| Reichardt E. 1999. Zur Revision der Gattung Gomphonema. Die Arten um G. affine/insigne, G. angustatum/micropus, G. acuminatum sowie gomphonemoide Diatomeen aus dem Oberoligozän in Böhmen. Iconographia Diatomologica, Vol. 8, Koeltz Scientific Books, A.R.G. Gantner Verlag, Ruggell. 203 pp | Morphology; Illustrations |
| Kociolek J. P., Kingston J.C. 1999. Taxonomy, ultrastructure, and distribution of some gomphonemoid diatoms (Bacillariophyceae : Gomphonemataceae) from rivers in the United States. Canadian Journal of Botany. 77: 686-705. | Morphology; Illustrations |
| Kociolek J. P., Spaulding S. A., Sabbe K., Vyverman W. 2004. New Gomphonema (Bacillariophyta) species from Tasmania. Phycologia. 43: 427-444. | Morphology; Illustrations |
| Jüttner I., Reichardt E., Cox E.J. 2004. Taxonomy and ecology of some new Gomphonema species common in Himalayan streams. Diatom Research. 19(2): 235-264. | Morphology; Illustrations; Taxonomy |
| Metzeltin D., Lange-Bertalot H. 2007. Tropical diatoms of South America II. Special remarks on biogeography disjunction. Iconographia Diatomologica, Vol. 18., Annotated Diatom Micrographs. Diversity-Taxonomy-Biogeography. H. Lange-Bertalot (ed.), A.R.G. Gantner Verlag K.G. 877 pp | Morphology; Illustrations |
| Levkov Z., Mitic-Kopanja D., Reichardt E. 2016. The diatom genus Gomphonema from the Republic of Macedonia. Lange-Bertalot H. (ed.) Diatoms of Europe, Vol. 8, Koeltz Botanical Books, Oberreifenberg. 552 pp | Morphology; Ecology; Taxonomy; Illustrations; Type Illustration; |
| Ress J.A., Thomas E.W., Kociolek J.P. 2016. Newly described Gomphonema and Gomphosphenia from Rocky Mountain Front Range streams, Colorado, USA, with additional discussion of rarely reported taxa. Diatom Research. 31(1-2): 51-62. | Morphology; Type Illustration; Illustrations; Ecology; Taxonomy |
| Gautam S., Pandey L.K., Vinayak V., Arya A. 2017. Morphological and physiological alterations in the diatom Gomphonema pseudoaugur due to heavy metal stress. Ecological Indicators. 72: 67-76. | Morphology; Biology; Ecology; Illustrations |
Similar Species
Similar species not published on this website:
This page should be cited as:
Mann D. G., Kelly M., Jüttner I. Gomphonema C.G. Ehrenberg; 1832; 87. In: Jüttner I., Carter C., Cox E.J., Ector L., Jones V., Kelly M.G., Kennedy B., Mann D.G., Turner J. A., Van de Vijver B., Wetzel C.E., Williams D.M..
Freshwater Diatom Flora of Britain and Ireland. Amgueddfa Cymru - National Museum Wales. Available online at https://naturalhistory.museumwales.ac.uk/diatoms/browsespecies.php?-recid=4208. [Accessed:
].
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Record last modified: 27/12/2020