Banca de DEFESA: GESSICA ELAINE AZEVEDO FERNANDES

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : GESSICA ELAINE AZEVEDO FERNANDES
DATE: 31/10/2023
TIME: 08:00
LOCAL: Auditório Paulo Cavalcante Sala 6
TITLE:

Taxonomy and Phylogeny of Tabernaemontana L. (Apocynaceae) in the neotropical region with emphasis on species occurring in the Amazon, Brazil

KEY WORDS:

Taxonomy. Revision. Monophily.

PAGES: 151
BIG AREA: Ciências Biológicas
AREA: Botânica
SUMMARY:

Apocynaceae is among the most representative families of angiosperms, with ca. from 378 genera and 5350 spp. In Brazil they are distributed in 94 genera and 974 species with occurrence in all phytogeographic domains of the country. Of the five subfamilies, only three occur in Brazil, Rauvolfioideae, Apocynoideae and Asclepiadoideae. The subfamily Rauvolfioideae is currently composed of 12 tribes, with Tabernaemontaneae being the largest tribe within this subfamily. Tabernaemontana is inserted in the subtribe Tabernaemontanenae and is one of the genera with the greatest diversity with more than 120 species, for Brazilian flora it has 30 species. This genus has a confusing taxonomic history, with many changes in its circumscription and in the recognition of its species. The last revision of the genus was proposed in the 40s, which was divided into seven sections based on a morphological study, of which only three (Bonafousia, Peschiera and Tabernaemontana) have representatives in Brazil. Phylogenetic studies demonstrated the monophyly of the genus with the inclusion of the neotropical genus Stemmadenia, however the infrageneric circumscription was still confused, showing the monophyly of the Peschiera and Rejoua sections and the paraphyletism of the Tabernaemontana and Bonafousia sections. The objective of the present work is to carry out a systematic study of Tabernaemontana for Brazil with emphasis on species from the Brazilian Amazon, including a taxonomic treatment with complete descriptions, identification keys and maps of geographic distribution and a phylogenetic study for the Neotropical species of the genus.

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