Cavinula D.G.Mann & A.J. Stickle in Round et al.; 1990; 665
Key references
Round F.E., Crawford R.M., Mann D.G. 1990. The Diatoms. Biology & Morphology of the Genera. Cambridge University Press, Cambridge. 747 pp
Cvetkoska A., Levkov Z., Hamilton P.B., Potapova M. 2014. The biogeographic distribution of Cavinula (Bacillariophyceae) in North America with the descriptions of two new species. Phytotaxa. 184(4): 181-207.
Morphology
Valves linear-lanceolate, rhombic-lanceolate, elliptical to almost round, with broadly rounded to protracted ends; girdle narrowly rectangular.
Valves isopolar, bilaterally symmetrical.
Striae radiate, uniseriate, fine, areolae sometimes transversely elongated. Areolae occluded internally by hymens which, within a striae, can be confluent forming a strip on the inside of each stria.
Raphe central, stopping short of the apices, raphe sternum internally slightly thickened. Externally central fissures expanded, distal terminal fissures absent or deflected in opposite directions. Internally central fissures straight, unexpanded.
Valve face flat, curving fairly abruptly into shallow margins.
Girdle composed of narrow bands with transverse rows of small pores.
One or two chloroplasts, usually H-shaped in girdle view, comprising lobed plates under the valves, connected by a bridge containing the pyrenoid.
Valves isopolar, bilaterally symmetrical.
Striae radiate, uniseriate, fine, areolae sometimes transversely elongated. Areolae occluded internally by hymens which, within a striae, can be confluent forming a strip on the inside of each stria.
Raphe central, stopping short of the apices, raphe sternum internally slightly thickened. Externally central fissures expanded, distal terminal fissures absent or deflected in opposite directions. Internally central fissures straight, unexpanded.
Valve face flat, curving fairly abruptly into shallow margins.
Girdle composed of narrow bands with transverse rows of small pores.
One or two chloroplasts, usually H-shaped in girdle view, comprising lobed plates under the valves, connected by a bridge containing the pyrenoid.
Literature
References are given in chronological order.
Reference |
Citation |
|---|---|
| Round F.E., Crawford R.M., Mann D.G. 1990. The Diatoms. Biology & Morphology of the Genera. Cambridge University Press, Cambridge. 747 pp | Morphology; Taxonomy; Description; |
| Lange-Bertalot H., Metzeltin D. 1996. Indicators of Oligotrophy. 800 taxa representative of three ecologically distinct lake types. Koenigstein, Koeltz Scientific Books. 390 pp | Morphology; Illustrations |
| Cvetkoska A., Levkov Z., Hamilton P.B., Potapova M. 2014. The biogeographic distribution of Cavinula (Bacillariophyceae) in North America with the descriptions of two new species. Phytotaxa. 184(4): 181-207. | Morphology; Ecology; Illustrations; Taxonomy |
| Kulikovskiy M., Lange-Bertalot H., Witkowski A., Kuznetsova I. 2014. Description of four species belonging in Cavinula D.G.Mann & Stickle from Lake Baikal with notes on family Cavinulaceae D.G.Mann in Round et al. 1990. Nova Hedwigia. 99(3-4): 487-499. | Morphology; Illustrations |
Similar Species
This page should be cited as:
Mann D. G., Kelly M., Jüttner I. Cavinula D.G.Mann & A.J. Stickle in Round et al.; 1990; 665. 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=3645. [Accessed:
].
Image Gallery
Record last modified: 14/01/2022