Playfair, G. in Maiden, J.H. & Betche, E. (ed.) (1917), Census of New South Wales freshwater algae. A census of New South Wales plants : with supplements to follow on vascular cryptogams by various specialists Suppl. 1: 231 [comb. nov.]

basionym: Cosmarium ellipsoideum var. subfoveatum Playfair legitimate

Krieger, W. & Gerloff, J. (1965), Die Gattung Cosmarium: 164 [secondary reference]

taxonomic synonym: Cosmarium contractum var. subellipticum (Playfair) Playfair legitimate

Day, S.A., Wickham, R.P., Entwisle, T.J. & Tyler, P.A. (1995), Bibliographic checklist of non-marine algae in Australia: - [secondary reference]

Entwisle, T.J. & Nairn, L. (2011), Census of Freshwater Algae in Australia. Edn. Version 1.0: - [secondary reference]

• Comment: Vulnerable (ANZECC)
• APC Comment: T.J.Entwisle and L.Nairn (2011) use this taxon concept.
• Distribution: New South Wales, Endemic to Australia

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