Template:Pienaar & Sym, 1997
- Pienaar, R.N. & Sym, S.D. 1997. Pyramimonas robusta sp. nov., a new punctate species, and a reappraisal of the subgenus Punctatae. Canadian Journal of Botany 75(11): 1965–1977. DOI: 10.1139/b97-909
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