Taxon Account

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.

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;
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

Similar Species

Similar species not published on this website:

Altana Kulikovskiy, Lange-Bertalot & Metzeltin; 2012; 38

Buryatia Kulikovskiy, Lange-Bertalot & Metzeltin; 2012; 50

Khursevichia Kulikovskiy, Lange-Bertalot & Metzeltin; 2012; 157

Lacustriella Lange-Bertalot, Kulikovskiy & Metzeltin; 2012; 168

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., Bennion H., Carter C., Cox E.J., Ector L., Flower R., Jones V., Kelly M.G., Mann D.G., Sayer C., Turner J. A., 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: 27/12/2020