TAXON 65 (2) • April 2016: 249–261 Powell & al. • Generic recircumscription in Schlechteranthus Phylogenetic placement and generic re-circumscriptions of the multilocular genera Arenifera, Octopoma and Schlechteranthus (Aizoaceae: Ruschieae): Evidence from anatomical, morphological and plastid DNA data Robyn F. Powell,1,2 James S. Boatwright,1 Cornelia Klak3 & Anthony R. Magee2,4 1 Department of Biodiversity & Conservation Biology, University of the Western Cape, Private Bag X17, Bellville, Cape Town, South Africa 2 Compton Herbarium, South African National Biodiversity Institute, Private Bag X7, Claremont 7735, Cape Town, South Africa 3 Bolus Herbarium, Department of Biological Sciences, University of Cape Town, 7701, Rondebosch, South Africa 4 Department of Botany & Plant Biotechnology, University of Johannesburg, P.O. Box 524, Auckland Park 2006, Johannesburg, South Africa Author for correspondence: Robyn Powell,
[email protected] ORCID RFP, http://orcid.org/0000-0001-7361-3164 DOI http://dx.doi.org/10.12705/652.3 Abstract Ruschieae is the largest tribe in the highly speciose subfamily Ruschioideae (Aizoaceae). A generic-level phylogeny for the tribe was recently produced, providing new insights into relationships between the taxa. Octopoma and Arenifera are woody shrubs with multilocular capsules and are distributed across the Succulent Karoo. Octopoma was shown to be polyphyletic in the tribal phylogeny, but comprehensive sampling is required to confirm its polyphyly. Arenifera has not previously been sampled and therefore its phylogenetic placement in the tribe is uncertain. In this study, phylogenetic sampling for nine plastid regions (atpB-rbcL, matK, psbJ-petA, rpl16, rps16, trnD-trnT, trnL-F, trnQUUG-rps16, trnS-trnG) was expanded to include all species of Octopoma and Arenifera, to assess phylogenetic placement and relationships of these genera.