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OLIVEIRA-DA-SILVA, F.R., GRADSTEIN, S.R. and ILKIU-BORGES, A.L. 2020. A new species and a new variety of <em>Radula</em> Dumort. (Radulaceae, Marchantiophyta) from Brazil. Phytotaxa. 454, 1 (Jul. 2020), 24–30. DOI:https://doi.org/10.11646/phytotaxa.454.1.2.