A tribo Microlicieae Triana (Melastomataceae) no Parque Nacional da Chapada dos Veadeiros, Goiás, Brasil

• Autor(a) principal: Neres, Danielle de Oliveira Diniz
• Data de Publicação: 2016
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da UFG
• Texto Completo: http://repositorio.bc.ufg.br/tede/handle/tede/9993
• topic: Biodiversidade; Cerrado; Florística; Taxonomia; Microlicia; Biodiversity; Floristics; Taxonomy; Microlicia; BOTANICA::TAXONOMIA VEGETAL

Melastomataceae has pantropical distribution and is one of the largest families of Myrtales, with 5105 species, 170 genera, ten tribes and two subfamilies (Olisbeoideae Burnett and Melastomatoideae Seringe). It includes plants with leaves opposite, usually exstipulate and with acrodromous venation, flowers epigynous or perigynous, 4–6-meras, with androecium diplostemonous, anthers poricidal and expressive connectives, appendaged or not, and capsular fruits or berries. In Brazil, it emerges as the ninth richest taxon, with 67 genera and 1373 species. Microlicieae, one of the tribes of this family, encompasses 250 species, 203 present in Brazil, and seven genera (Chaetostoma DC., Lavoisiera DC., Microlicia D. Don, Poteranthera Bongard, Rhynchanthera DC., Stenodon Naudin, and Trembleya DC.), easily recognized by flower and fruit characters. The taxonomy of Microlicieae lacks studies, especially in the Midwest Region of Brazil, where its representatives are generally cited in floristic listings. The mountainous areas in this region display high endemism and species richness such as in Chapada dos Veadeiros, in the north of the state of Goiás. In turn, it includes the Chapada dos Veadeiros National Park (CVNP), one of the largest Units of Conservation in Brazil, with 67,000 hectares, covered predominantly by the Cerrado biome, but the flora still little known there. This dissertation aimed to perform the taxonomic treatment of the tribe Microlicieae in the CVNP using the current methodology of plant taxonomy. As our results, we present four articles. The first one corresponds to the taxonomic treatment of Microlicieae and includes commented descriptions and illustrations of 30 species distributed in the genera Microlicia D. Don. (18), Trembleya DC. (4), Chaetostoma DC. (3), Lavoisiera DC. (1), Stenodon Naudin (1), and Rhynchanthera DC. (1). Among the species found, four are new to science, one is a new record in the state of Goiás and belong to the genus Microlicia, three (M. crebropunctata Pilg., M. melanostagma Pilg, and T. debilis Glaz.) can be considered rare, and the other ones are commonly found in the state of Goiás. The other three articles, written following the traditional model, deal with the description of new species. The studied taxa grow in cerrado sensu stricto or rupestre, near water bodies or not, or in open humid fields (grasslands). The present results corroborate the floristic richness of the CVNP and highlight the importance of its conservation, since the taxa of Microlicieae found there correspond to 70% of the total ones cited for the state of Goiás.