Template:Sym & Pienaar, 1997
- Sym, S.D. & Pienaar, R.N. 1997. Further observations on the type subgenus of Pyramimonas (Prasinophyceae), with particular reference to a new species, P. chlorina, and the flagellar apparatus of P. propulsa. Canadian Journal of Botany 75(12): 2196–2215. DOI: 10.1139/b97-930
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