• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 1
  • Tagged with
  • 2
  • 2
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Taxonomic studies in Cyperaceae

Oteng-Yeboah, Alfred Apau January 1972 (has links)
Part I deals with the supra-specific classification of the subfamily Cyperoideae (excluding the tribe Rhynchosporeae) on a world-wide basis. It involves a broad survey of comparative exomorphic and endomorphic characters, with an analysis and synthesis of all available information from the literature. Many microscopic features of the leaf, culm, glume; hypogynous perianth bristle, stamen, style, stigma and fruit have been examined, many of them for the first time. Most of these features, together with the already known characters commonly used in the classification of genera in the subfamily Cyperoideae, have been employed to form the basis of the supra-specific classification presented here. The two large Linnaean genera, viz: Scirpus and Cyperus, have been split into a number of small, natural genera. Four distinct taxa, previously included in Scirpus a.l., are for the first time accorded generic status, though formal generic names have not been given to 3 of these. These 3 unnamed genera have been temporarily called Genera A, B and C. Cyperus, in the restricted sense used here, is found still to be partly unnatural, but further studies are needed before attempting to change its circumscription. Of the 47 genera adopted in this work, 25 are monotypic and/or geographically restricted; the rest being widely distributed. The maximum concentration of species and genera is found to occur in the tropics. Formal taxonomic treatments have been given to all the 47 genera in the conclusion, except for those genera which were not personally investigated; for the latter only keys for their identification and appropriate literature references have been given. An informal tribal and subtribal grouping has been proposed to accommodate the narrower, more natural genera adopted, since the limits of the traditional tribes Cypereae and Scirpeae no longer stand. New nomenclatural combinations, as well as the list of species and citation of voucher specimens studied anatomically, have been given in Appendices. Part II deals with the revision of the entire subfamily Cyperoideae as it is represented in the area covered by the Flora of Turkey (Davis 1965-). 47 species representing 21 genera are found in this area. This number includes taxa either seen by me or accepted from reliable records in the literature. Descriptions, synonymy, habitats, specimen citations on a grid basis, notes on the variability of Turkish species, and a key for their identification have been included in this account. Two new taxa have been discovered, for which English diagnoses have been given. Finally, an attempt has been made to explain some of the apparent disjunctions in the distribution of certain species in Turkey.
2

Perlidae (Plecoptera) da Serra de Paranapiacaba, Estado de São Paulo : integrando informações morfológicas e moleculares na identificação de espécies /

Almeida, Lucas Henrique de. January 2018 (has links)
Orientador: Pitágoras da Conceição Bispo / Banca: Sérgio Nascimento Stampar / Banca: Lucas Silveira Lecci / Resumo: Plecoptera compreende uma ordem de insetos aquáticos com aproximadamente 3500 espécies conhecidas, sendo distribuídas em 16 famílias. No Brasil são registradas apenas duas famílias, sendo Gripopterygidae e Perlidae. Neste trabalho foram estudadas as espécies de Perlidae da Serra de Paranapiacaba, incluindo os Parques Estaduais Carlos Botelho (PECB), Intervales (PEI) e Turístico do Alto Ribeira (PETAR), Estado de São Paulo. Com o objetivo de integrar o conhecimento taxonômico ao molecular, obtendo identificações de adultos e a associação adulto-ninfa utilizando DNA Barcode. Foram registradas 14 espécies, sendo Anacroneuria representado por nove espécies: A. boraceiensis, A. debilis, A. fiorentini, A. flintorum, A. iporanga, A. itajaimirim, A. polita, A. subcostalis e A. tupi. Kempnyia por quatro espécies: K. auberti, K. colossica, K. flava e K. neotropica. Macrogynoplax por apenas uma espécie: M. veneranda. Foram realizados dois novos registros (Anacroneuria debilis e A. fiorentini), duas descrições de imaturos (A. flintorum e A. tupi) e uma sinonimização (Kempnyia petersorum). Adicionalmente, é fornecida uma chave de identificação de adultos da região / Abstract: Plecoptera comprises an order of aquatic insects with aproximately 3500 species, distributed in 16 families. In Brazil, only two families are recorded, being Gripopterygidae and Perlidae. In this work, were studied the species of Perlidae from Paranapiacaba mountains, including the Carlos Botelho State Park (PECB), Intervales State Park (PEI), and Alto Ribeira Tourist State Park (PETAR), São Paulo State. With the objective of integrating the taxonomic knowledge to the molecular, obtaining identifications of adults and the adult-nymph association using the DNA Barcode. Were recorded fourteen species, being Anacroneuria represented by nine species: A. boraceiensis, A. debilis, A. fiorentini, A. flintorum, A. iporanga, A. itajaimirim, A. polita, A. subcostalis and A. tupi. Kempnyia by four species: K. auberti, K. colossica, K. flava and K. neotropica. Macrogynoplax by only one species: M. veneranda. Were made two new records (Anacroneuria debilis and A. fiorentini), two descriptions of nymphs (A. flintorum and A. tupi), and one synonymization (Kempnyia petersorum). In addition, a key is provided for the identification of adults from the region / Mestre

Page generated in 0.0516 seconds