Systematic studies on the subtribe Disinae (Orchidaceae)

Simple item page
dc.contributor.authorLinder, Hans Peteren_ZA
dc.date.accessioned2016-09-20T12:35:00Z
dc.date.available2016-09-20T12:35:00Z
dc.date.issued1982en_ZA
dc.descriptionBibliography: pages 126-138.en_ZA
dc.description.abstractThe subtribe Disinae (Orchidaceae) has been revised over its whole distribution range (Sub-Saharan Africa and including the Yemen, Madagascar and Reunion). One hundred and sixty-five species arranged in 5 genera are recognized. Three new subspecies, 12 new species, 18 new series, 8 new sections and 7 new subgenera are described. Where deemed necessary, the species are grouped into subgenera, sections and series to indicate their interrelationships. Distribution maps were prepared for all the species, and the ecology and nomenclature of every species is discussed, while many are illustrated. The revision is based primarily on morphological data. In complex situations the variation is displayed by scatter diagrams. Both artificial and natural keys are reduced for the large genus Disa. The grouping of the sections and genera is analysed both by computer-based phenetic analyses, using the BOLAID program, and by Hennigian phylogenetic studies. The eventual classification is based on the phylogenetic scheme. The groupings produced by the two methods are compared and discussed and the theoretical bases of classifications are briefly discussed. The phytogeography of the subtribe is analysed in some detail. Centres of endemism are delimited, and their interrelationships are analysed, together with the patterns of species and above-species richness. The history of the subtribe is analysed using the taxonomic rank of the disjunctions between the centres as an indication of the age of the disjunctions. The postulated history is then compared to modern ideas on the recent African palaeoenvironments. On this evidence it is suggested that the Disinae migrated northwards from an early diversification in southern Africa, and that the present patterns have been much influenced by climatic changes in the last 50 000 years.en_ZA
dc.identifier.apacitationLinder, H. P. (1982). <i>Systematic studies on the subtribe Disinae (Orchidaceae)</i>. (Thesis). University of Cape Town ,Faculty of Science ,Department of Biological Sciences. Retrieved from http://hdl.handle.net/11427/21849en_ZA
dc.identifier.chicagocitationLinder, Hans Peter. <i>"Systematic studies on the subtribe Disinae (Orchidaceae)."</i> Thesis., University of Cape Town ,Faculty of Science ,Department of Biological Sciences, 1982. http://hdl.handle.net/11427/21849en_ZA
dc.identifier.citationLinder, H. 1982. Systematic studies on the subtribe Disinae (Orchidaceae). University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Linder, Hans Peter AB - The subtribe Disinae (Orchidaceae) has been revised over its whole distribution range (Sub-Saharan Africa and including the Yemen, Madagascar and Reunion). One hundred and sixty-five species arranged in 5 genera are recognized. Three new subspecies, 12 new species, 18 new series, 8 new sections and 7 new subgenera are described. Where deemed necessary, the species are grouped into subgenera, sections and series to indicate their interrelationships. Distribution maps were prepared for all the species, and the ecology and nomenclature of every species is discussed, while many are illustrated. The revision is based primarily on morphological data. In complex situations the variation is displayed by scatter diagrams. Both artificial and natural keys are reduced for the large genus Disa. The grouping of the sections and genera is analysed both by computer-based phenetic analyses, using the BOLAID program, and by Hennigian phylogenetic studies. The eventual classification is based on the phylogenetic scheme. The groupings produced by the two methods are compared and discussed and the theoretical bases of classifications are briefly discussed. The phytogeography of the subtribe is analysed in some detail. Centres of endemism are delimited, and their interrelationships are analysed, together with the patterns of species and above-species richness. The history of the subtribe is analysed using the taxonomic rank of the disjunctions between the centres as an indication of the age of the disjunctions. The postulated history is then compared to modern ideas on the recent African palaeoenvironments. On this evidence it is suggested that the Disinae migrated northwards from an early diversification in southern Africa, and that the present patterns have been much influenced by climatic changes in the last 50 000 years. DA - 1982 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1982 T1 - Systematic studies on the subtribe Disinae (Orchidaceae) TI - Systematic studies on the subtribe Disinae (Orchidaceae) UR - http://hdl.handle.net/11427/21849 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/21849
dc.identifier.vancouvercitationLinder HP. Systematic studies on the subtribe Disinae (Orchidaceae). [Thesis]. University of Cape Town ,Faculty of Science ,Department of Biological Sciences, 1982 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/21849en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentDepartment of Biological Sciencesen_ZA
dc.publisher.facultyFaculty of Scienceen_ZA
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherBotanyen_ZA
dc.titleSystematic studies on the subtribe Disinae (Orchidaceae)en_ZA
dc.typeDoctoral Thesis
dc.type.qualificationlevelDoctoral
dc.type.qualificationnamePhDen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
thesis_sci_1982_linder_hans_peter.pdf
Size:
7.58 MB
Format:
Adobe Portable Document Format
Description:
Download
Collections
PhD / Doctoral