A new species and molecular phylogeny of Brazilian succulent Euphorbia sect. Brasilienses

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 bas...

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Bibliographic Details
Published in:Systematics and biodiversity 2018-10, Vol.16 (7), p.658-667
Main Authors: Hurbath, Fernanda, Leal, BÁrbara SimÕes Santos, Da Silva, Otávio Luis Marques, Palma-Silva, Clarisse, Cordeiro, INês
Format: Article
Language:English
Subjects:
Appendages
Campos rupestres
Endangered species
Espinhaço Range
Euphorbia
Euphorbia subg. Euphorbia
Glands
iselbergs
New species
Phylogeny
Physical characteristics
rocky caatinga
systematics
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Summary: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.
ISSN:1477-2000
1478-0933
DOI:10.1080/14772000.2018.1473897