A new species and molecular phylogeny of Brazilian succulent Euphorbia sect. Brasilienses |
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| Authors: | Fernanda Hurbath BÁrbara SimÕes Santos Leal Otávio Luis Marques Da Silva Clarisse Palma-Silva INês Cordeiro |
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| Institution: | 1. Nucleo de Pesquisa Curadoria do Herbário SP, Instituto de Botanica, Avenida Miguel Stéfano 3687, S?o Paulo, 04045-972, SP, Brazilfhurbath@gmail.com;3. Laboratório de Ecologia Molecular, Departamento de Ecologia, Universidade Estadual Paulista – Rio Claro, Avenida 24A 1515, Rio Claro, 13506-900, SP, Brazil;4. Nucleo de Pesquisa Curadoria do Herbário SP, Instituto de Botanica, Avenida Miguel Stéfano 3687, S?o Paulo, 04045-972, SP, Brazil;5. Departamento de Biologia Vegetal, Universidade Estadual de Campinas, Cidade Universitária Zeferino Vaz – Bar?o Geraldo, Campinas, 13083-863, SP, Brazil |
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| Abstract: | A new species of Euphorbia sect. Brasilienses V.W. Steinm. & Dorsey is described. Euphorbia tetrangularis Hurbath & Cordeiro is endemic to the Serra de Montevidéu, a part of the Espinhaço Range located in the state of Minas Gerais, Brazil. It differs from other species within the section based on the following characters: 4-ribbed branches, green cyathia, and green cyathial glands with erect appendages. This new species would qualify as critically endangered (CR) according to IUCN criteria. An inferred phylogeny based on a combined dataset of nuclear (ITS1) and plastid regions (psbA-trnH, trnC-ycf6, matK, atpI-atpH, psbJ-petA, trnQ-rps16?×?1) confirms the monophyly of Euphorbia sect. Brasilienses and supports the recognition of E. tetrangularis. The phylogeny also suggests that this group probably underwent a recent radiation. |
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| Keywords: | Campos rupestres Espinhaço Range Euphorbia subg Euphorbia iselbergs rocky caatinga systematics |
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