A new species and molecular phylogeny of Brazilian succulent Euphorbia sect. Brasilienses
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Data
2018-01-01
Autores
Hurbath, Fernanda
Santos Leal, Barbara Simoes [UNESP]
Marques Da Silva, Otavio Luis
Palma-Silva, Clarisse [UNESP]
Cordeiro, Ines
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Editor
Taylor & Francis Ltd
Resumo
A new species of Euphorbia sect. Brasilienses V.W. Steinm. & Dorsey is described. Euphorbia tetrangularis Hurbath & Cordeiro is endemic to the Serra de Montevideu, a part of the Espinhaco 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-rps16x1) 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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Palavras-chave
Campos rupestres, Espinhaco Range, Euphorbia subg, Euphorbia, iselbergs, rocky caatinga, systematics
Como citar
Systematics And Biodiversity. Abingdon: Taylor & Francis Ltd, v. 16, n. 7, p. 658-667, 2018.