Semiorbis R.M.Patrick in Patrick & Reimer; 1966; 162
Key references
Patrick R., Reimer C.W. 1966. The Diatoms of the United States. Exclusive of Alaska and Hawaii. Volume 1. Fragilariaceae, Eunotiaceae, Achnanthaceae, Naviculaceae. Monographs of the Academy of Natural Sciences of Philadelphia 13. 688 pp; 64 pls.
Reid G., Williams D.M. 2010. Notes on the genus Semiorbis Patrick with a description of a new species. Diatom Research. 25(2): 355-365.
Edlund M.B., Burge D.R.L., Andresen N.A., Vandermeulen D.D., Stone J.R., Van de Vijver B. 2021. The genus Semiorbis (Eunotiaceae, Bacillariophyta) in North America. Diatom Research DOI: 10.1080/0269249X.2021.1875053.
Morphology
Valves strongly lunate with shallow mantle.
External valve surface with transverse ridges often terminating at dorsal and ventral valve margins in spine-like projections. Striae uniseriate or partially biseriate with small, rounded areolae.
Simple, short raphe present at both valve poles. Proximal raphe branches located near the valve/mantle junction, terminal fissures curving onto the valve face near the poles. Rimoportulae are absent.
External valve surface with transverse ridges often terminating at dorsal and ventral valve margins in spine-like projections. Striae uniseriate or partially biseriate with small, rounded areolae.
Simple, short raphe present at both valve poles. Proximal raphe branches located near the valve/mantle junction, terminal fissures curving onto the valve face near the poles. Rimoportulae are absent.
Literature
References are given in chronological order.
Reference |
Citation |
|---|---|
| Ehrenberg C.G. 1854. Mikrogeologie. Das Erden und Felsen schaffende Wirken des unsichtbar kleinen selbstständigen Lebens auf der Erde. Leopold Voss, Leipzig. 374 pp; 40 pls | Illustrations |
| Patrick R., Reimer C.W. 1966. The Diatoms of the United States. Exclusive of Alaska and Hawaii. Volume 1. Fragilariaceae, Eunotiaceae, Achnanthaceae, Naviculaceae. Monographs of the Academy of Natural Sciences of Philadelphia 13. 688 pp; 64 pls. | Morphology; Description; Taxonomy; Illustrations |
| Morrow A.C., Deason T.R., Clayton D. 1981. A new species of the diatom genus Eunotia. Journal of Phycology. 17: 265-270. | Morphology; Taxonomy |
| Reid G., Williams D.M. 2010. Notes on the genus Semiorbis Patrick with a description of a new species. Diatom Research. 25(2): 355-365. | Illustrations; Morphology; Taxonomy |
| Edlund M.B., Burge D.R.L., Andresen N.A., Vandermeulen D.D., Stone J.R., Van de Vijver B. 2021. The genus Semiorbis (Eunotiaceae, Bacillariophyta) in North America. Diatom Research DOI: 10.1080/0269249X.2021.1875053. | Morphology; Taxonomy; Illustrations; |
This page should be cited as:
Jüttner I., Williams D.M., Jones V., Ector L. Semiorbis R.M.Patrick in Patrick & Reimer; 1966; 162. 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=4548. [Accessed:
].
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Record last modified: 09/02/2021