https://repositorio.ufra.edu.br/jspui/handle/123456789/1983 2026-07-07T20:48:27Z https://repositorio.ufra.edu.br/jspui/handle/riufra/2866 Título: Revisão taxonômica Integrativa das Espécies Neotropicais de Radulaceae (MARCHANTIOPHYTA) Autor(es): OLIVEIRA-DA-SILVA, Fúvio Rubens Abstract: Integrative taxonomic revision of neotropical species of Radulaceae (Marchantiophyta) Radulaceae Müll. Frib. (Porellales Schljakov; Radulinae R.M.Schust.) is a diverse group with more than 300 species distributed worldwide and one of the most isolated lineages of the leafy liverworts (Marchantiophyta Stotl. & Crand.-Stotl.; Jungermanniidae Engl.). Distinctive morphological diagnostics of the family include rhizoids in tufts on the lobule surface, Radulatype branches, large, brown oilbodies, absence of underleaves, and perianth tubular, dorsiventrally flattened. The center of diversity of the species is in the humid tropical regions, although they are distributed on all continents except Antarctica. Most species grow as epiphytes in preserved tropical forests, from the lowlands to montane forests above 4000 m altitude. The family has three genera (Cladoradula, Dactyloradula and Radula), but most species belong to the genus Radula Dumort., which is subdivided into five subgenera: Amentuloradula Devos et al., Metaradula R.M.Schust., Odontoradula K.Yamada, Radula e Volutoradula Devos et al. Circunscriptions of these subgenera are problematic and the subgeneric divisions, supported only by molecular data, are unclear, especially among neotropical species. The species of Radulaceae that occur in temperate forests and in the paleotropical regions of the world have had their taxonomy reviewed, leaving a gap in taxonomic knowledge for the species of the neotropical region, with more than 140 names described and around 75 species currently accepted. A preliminary revision of the species of Radulaceae in Brazil showed that the number of these currently accepted species is probably excessive and that several of them may be synonyms, although new species may yet be discovered. The aim of this study is to carry out an integrative taxonomic revision of the neotropical species of Radulaceae, based on a comprehensive study of types, additional herbarium collections and field collections, using morphological, anatomical, ecological and palynological evidence. Early on in this study, it was possible to identify new taxa with striking features such as bordered leaves (Chapter I). In addition to the review of species from tropical America, a revision was made of Radulaceae species from tropical Africa, especially Madagascar, which resulted in the discovery of two new synonyms of neotropical species in one African (Chapter II). As part of the taxonomic revision, special attention was paid to littlestudied characteristics that can be taxonomically informative, such as spores. In Chapter III, was carried out the first palynological assessment of sixteen species of Radulaceae. Palynological data, especially spore ornamentation, can be an important contribution to the taxonomy of Radulaceae in separating species or groups of species. From the totality of the data and the greater understanding in the circumscription of the species, the taxonomy of Radulaceae was revised, in which detailed descriptions of the species, illustrations of selected taxa, identification keys for all species and comments on their relationships, geographical distribution (with maps) and habitat are presented (Chapter IV). The revision recognized 54 species and six varieties, starting from 75 species initially accepted for the Neotropics. Three new species were discovered and are described in this last chapter, as well as three taxa were reinstated as synonyms of other species; a new combination was proposed, as well as 27 new synonyms, 42 new lectotypes, and six species were placed as doubtful or excluded. The taxonomic revision of Radulaceae in tropical America has led to a better understanding of the circumscription and distribution of the taxa, creating a secure base that will help in future studies. 2024-03-21T00:00:00Z https://repositorio.ufra.edu.br/jspui/handle/riufra/2853 Título: Revisão taxonômica das espécies de Tabernaemontana L. (Apocynaceae) da Amazônia brasileira, Brasil. Autor(es): FERNANDES, Géssica Elaine Azevedo Abstract: The Apocynaceae family stands out as one of the most representative within the angiosperm group, comprising approximately 378 genera and 5,350 species. In the Brazilian context, this family is distributed across 96 genera and 977 species, encompassing all biomes present in the country. Among the five subfamilies that constitute the Apocynaceae family, only three are present in Brazil, namely Rauvolfioideae, Apocynoideae, and Asclepiadoideae. The subfamily Rauvolfioideae consists of 12 tribes, with the Tabernaemontaneae tribe standing out as one of the most diversified. Within this tribe, the genus Tabernaemontana, inserted into the Tabernaemontanenae subtribe, emerges as one of the most diversified, comprising over 120 species. Among these, 46 occur in the neotropics, with 30 recorded in Brazil, and of these, 25 in the Brazilian Amazon region. The taxonomy of the Tabernaemontana genus reveals a complex and extensive history marked by significant changes in its circumscription and species recognition, especially in the Amazonian regions where nomenclature and taxonomy were less explored. Recent phylogenetic studies have recognized the genus as monophyletic, including the neotropical genus Stemmadenia. However, the infrageneric circumscription remained ambiguous, demonstrating monophyly only in the Peschiera and Rejoua sections, while other sections exhibited paraphyly. Despite the abundance of Amazonian species, some were not included in the previous phylogeny. The last taxonomic revision of the genus, conducted in the 1990s, proposed seven sections based exclusively on morphological characters. Among these, only two (Bonafousia and Peschiera) have representatives in Brazil, which were the focus of the present study. The objective of this study was to conduct a systematic approach to Tabernaemontana in the Brazilian context, with an emphasis on species occurring in the Amazon, as well as a nomenclatural revision of the discussed species. To achieve this, a comprehensive taxonomic treatment was developed, including detailed descriptions, identification keys, maps of geographic distribution and diversity, as well as considerations on phenology and conservation status. Samples of the genus were analyzed in the IAN, INPA, MG, UFACPZ, RON herbaria in person, while others were requested on loan or analyzed online through digitized images available in foreign and national herbaria databases. Over 4,000 specimens were analyzed in person, resulting in the development of three thesis chapters, encompassing the treatment of 207 names, of which 25 were accepted, 18 lectotypifications, two neotypifications, one epitypification, the proposition of a new name, the reinstatement of a species, and the description of a new species for science. 2025-08-31T00:00:00Z https://repositorio.ufra.edu.br/jspui/handle/123456789/2644 Título: Sistemática de Rhynchospora seç. Pauciflorae Kük. (Cyperaceae). Autor(es): ALVES, Karina de Nazaré Lima Abstract: Rhynchospora Vahl (Cyperaceae) has approximately 400 known species, is a highly diverse genus in the Americas, particularly in the Neotropics, and has significant levels of endemism in tropical and subtropical savannas. It is also the richest genus of Cyperaceae in Brazil, with species occurring in all states and phytogeographic domains. The genus was revised and divided by Kükenthal into two subgenera and 28 sections, which have since been revisited by other researchers. Rhynchospora sect. Pauciflorae has never been revised since its establishment by Kükenthal in 1949. It is part of an informal group created by the author, "Pars Capitatae," which also includes R. sect. Pluriflorae. Researchers who have revised R. sect. Pluriflorae have emphasized the importance of taxonomic and systematic studies in R. sect. Pauciflorae to test the monophyly of the section and better understand its relationship with its sister section, as the two share traits used in its circumscriptions sensu Kükenthal. Rhynchospora sect. Pauciflorae had 20 species, 13 from the subsect. Plumososetosae, occurring in the Neotropics, Australia and Asia, and 7 from the subsect. Scabrosetosae, restricted to Asia and Australia. The objective of this project was to conduct taxonomic, and morphological, studies on Rhynchospora sect. Pauciflorae (Cyperaceae) to elucidate biodiversity, and refine the circumscription of the taxa studied. Field expeditions were conducted to collect botanical material, along with in-person consultations of herbarium collections in Brazil and the United States, as well as databases and images from international herbaria. The taxonomic treatment was carried out through consultation of original works and nomenclatural types. We are proposing 24 first-step lectotypifications, and 2 second-step lectotypifications. Scanning Electron Microscopy (SEM) images of the external micromorphology of the fruits were taken. More than 2,500 specimens were analyzed, with 16 species of R. sect. Pauciflorae treated for the Neotropics, three of which were described during this revision. This study presents chapters describing a new species of R. sect. Pluriflorae, a chapter with 17 lectotypifications in R. sect. Pauciflorae, descriptions of two new species in sect. Pauciflorae, and a taxonomic revision of Neotropical R. sect. Pauciflorae, in this chapter first-step lectotypifications were made for Rhynchospora barbata (Vahl) Kunth, R. trichochaeta C.B. Clarke, and a second-step lectotypification for R. subplumosa C.B. Clarke, as well as for section Pauciflorae and subsections Scabrosetosae and Plumososetosae. Additionally, Rhynchospora unisetosa T. Koyama is proposed as a new synonym for R. hirta (Nees) Boeckeler, and Rhynchospora denticulata Huber is being reinstated as an accepted species. Descrição: Foi disponibilizado apenas os metadados desse trabalho, pois o mesmo está em embargo por conta dos artigos científicos serem publicadas em revista científica de acesso fechado (pago). 2025-05-30T00:00:00Z https://repositorio.ufra.edu.br/jspui/handle/123456789/2550 Título: Revisão de Notylia Lind. (Oncidiinae: Orchidaceae) no Brasil: aspectos taxonômicos e fitoquímicos. Autor(es): OLIVEIRA, Miguel Sena de Abstract: Notylia Lindley is a Neotropical genus of orchids comprising 45 accepted species. Its reduced flowers and certain morphological homogeneity have led to numerous misidentifications in herbaria and the erroneous description of several taxa. Additionally, some names required nomenclatural adjustments, such as synonymization or designation of nomenclatural types. Moreover, although it is known that Notylia is a genus with fragrant flowers that attract male Euglossini bees, little is known about the chemical composition of the floral perfumes of its species. Until now, there has not been a single complete record of the volatile compounds present in the perfume of any species within the genus. The aim of this research was to conduct a taxonomic, nomenclatural, and phytochemical study of the species in the genus Notylia. Chapter I presents a nomenclator with all published names for Notylia. A total of 109 names were reviewed, resulting in the designation of 31 lectotypes and 20 neotypes. Chapter II elucidates the N. platyglossa complex and related species. The synonymization of N. peruviana and N. morenoi under N. platyglossa was proposed. Lectotypes for N. peruviana and N. morenoi and neotypes for N. platyglossa and N. boliviensis were designated. Additionally, N. boliviensis was distinguished from N. platyglossa, and the first record of this species for Brazil was validated. Chapter III provides the first complete chemical composition analysis of the species N. fragrans and N. microchila. A total of 82 compounds were identified, revealing significant differences in compound abundance between the species. While N. fragrans is characterized by eugenol as the major compound, N. microchila exhibits high concentrations of (E)-β-Farnesene. Chapter IV presents a taxonomic revision of the genus Notylia for Brazil. A total of 33 binomials were evaluated, of which 13 are recognized as species, including two endemics to the country. Notylia tenuis was reinstated at the species level, and Notylia fragrans was confirmed as an accepted name. Additionally, the conservation status of the endemic species was assessed. This study of the genus Notylia in Brazil has led to a better understanding of species circumscriptions, clarified the true species richness in Brazil, and provided updated delimitations and distributions. It is expected that this study will provide a foundation for future cytogenetic, biogeographical, and phylogenetic research on the genus. Descrição: A tese encontra-se publicada em Revistas internacionais de acesso pago. 2025-02-19T00:00:00Z