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Name derivation:
Classification:
Cavinula D.G.Mann and A.J.Stickle 1990; 18 of 25 species descriptions are currently accepted taxonomically. Order Naviculales; Family Cavinulaceae
Morphology:
Uniseriate radial striae. One or two chloroplasts, H=shaped in girdle view. See description online. Distinguished by the linear to round-elliptical valve shape, uniseriate striae, presence of nodules and distinctive terminal pores (Cvetkoska et al 2013).
Similar genera:
Navicula does not have uniseriate radial striae.
Habitat:
Freshwater, oligotrophic lakes and moist terrestrial areas. Several species reported from the Canadian Arctic Archipelago (Antoniades et al 2009).
References:
Guiry, M.D. and G.M. Guiry 2013. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 11 December 2013. Antoniades, D., P.B. Hamilton, F. Hinz, M.S.V. Douglas and J.P. Smol (2009): Seven new species of freshwater diatoms (Bacillariophyceae) from the Canadian Arctic Archipelago. - Nova Hedwigia 88: 57-80. Cvetkoska, A., Z. Levkov, P.B. Hamilton and M. Potapova. 2013. The Biogeographic Distribution of Cavinula (Bacillariophyceae) in North America with the Descriptions of two new species. Phytotaxa 184 (4). Round, F.E., R.M. Crawford, and D.G. Mann 1990. The Diatoms: Biology and morphology of the genera. pp. i-xi, 1-747. Cambridge: Cambridge University Press.