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Systematics and phylogeny of Maytenus Molina (Celastraceae) for Neotropics

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Author(s):
Leonardo Biral dos Santos
Total Authors: 1
Document type: Doctoral Thesis
Press: Rio Claro. 2016-07-29.
Institution: Universidade Estadual Paulista (Unesp). Instituto de Biociências. Rio Claro
Defense date:
Advisor: Julio Antonio Lombardi; Eric de Camargo Smidt
Abstract

Celastraceae sensu lato (including Hippocrateaceae) is primarily a pantropical family, with several subtropical and fewer temperate members, comprising ca. 1,200 species of trees, shrubs, woody lianas, and rare herbs. Maytenus is the largest genus in the New World, bearing between 120 and 140 species with 90 of them occurring in South America, the center of diversity. The species are widely distributed among almost all types of vegetation from sea level to an elevation of 3,900 m on Andes. Maytenus species show low variation of reproductive characters and recognizing most of them is commonly based on their vegetative attributes, such as young twigs and leaves, which makes difficult to characterize some of them. A synopsis of species existing in South America is presented here, providing information related to: typification, synonyms, geographical distribution, diagnostic characters, and comments considered relevant, as well as a list with selected examined material and a short description of each taxa. A checklist comprising the species occurring in North and Central America and the Caribbean is provided, representing an initial effort to compile data for taxonomic studies in the future. Finally, a phylogeny based on morphological and molecular data of four genomic regions (26S rDNA, ITS, matK and trnL-F) is presented relying on the principle of parsimony, in which we discusse the results that will lead to a new circumscription of the genus, in order to recognize only monophyletic genera within Celastraceae. (AU)

FAPESP's process: 11/21879-5 - Systematics and phylogeny of Maytenus Molina (Celastraceae) in the Neotropical Region
Grantee:Leonardo Biral dos Santos
Support type: Scholarships in Brazil - Doctorate