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Relevant bibliographies by topics / Systematik och fylogeni

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Dissertations / Theses

Academic literature on the topic 'Systematik och fylogeni'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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Dissertations / Theses on the topic "Systematik och fylogeni"

1

Hovmöller, Rasmus. "Molecular phylogenetics and taxonomic issues in dragonfly systematics (Insecta: Odonata)." Doctoral thesis, Stockholm University, Department of Zoology, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-1065.

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<p>Dragonflies (Odonata) are one of the ancestral groups of extant insects. They represent one of the three most basal branches in the phylogeny of winged insects. The other two groups are the Ephemeroptera, mayflies, and Neoptera, the latter which covers the remaining winged insects. The first paper is about the phylogenetic position of Odonata in relation to the other basal insect clades using 18S and 28S rDNA sequences. It was demonstrated that there are under certain parameters a strong statistical support for a sister-group relationship between Odonata and Neoptera forming the group Palae

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2

Sjölin, Erica. "Tubificids with trifid chaetae: morphology and phylogeny of Heterodrilus (Clitellata, Annelida)." Doctoral thesis, Stockholms universitet, Zoologiska institutionen, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-7182.

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Heterodrilus is a marine group of small (3-25 mm) clitellates that occur interstitially in sandy sediments from the intertidal zone down to about 150 m depths. The taxon includes 42 valid species and has been recorded from localities in the Mediterranean Sea, the North-west Atlantic Ocean (including the Caribbean), the Galapagos Islands, and the Indo-Pacific Region. A majority of the species of Heterodrilus are characterized by having trifid anterior chaetae (i.e., chaetae with three teeth at the distal end). A few species have bifid chaetae, but these are regarded as having lost the third too

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3

den, Tex Robert-Jan. "Patterns and Processes of Evolution in Sundaland." Doctoral thesis, Uppsala universitet, Evolutionsbiologi, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-152213.

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Biodiversity in the tropics is disproportionately high compared to other habitats, and also under disproportionate threat from human impact. It is necessary to understand how this diversity evolved and how it is partitioned across space in order to preserve it. In this thesis I construct phylogenies of tropical forest dependent vertebrates from Southeast Asia and the islands of the Sunda shelf, a region referred to as Sundaland. I focus on the tree squirrels (genus Sundasciurus) and Asian barbets (Aves: Family Megalaimidae), two taxa with similar ecological characteristics. I use these phyloge

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4

Dehghani, Reihaneh. "Aspects of carnivoran evolution in Africa." Doctoral thesis, Stockholm University, Department of Zoology, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-7506.

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<p>This thesis concerns the evolution of African small carnivorans, with emphasis on East African Viverridae and Herpestidae (Carnivora, Mammalia). Viverridae and Herpestidae are two Old World feliform (belonging to the cat branch) carnivoran families with a confusing, and sometimes even misleading, taxonomic and systematic history, in addition to a scarce fossil record. </p><p>A new genus and species from Fort Ternan, western Kenya, dated to ca 14 Mya (million years ago), was described and tentatively assigned to the Viverridae. The excellent preservation of this material has the potential to

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5

Wallberg, Andreas. "The Dawn of a New Age : Interrelationships of Acoela and Nemertodermatida and the Early Evolution of Bilateria." Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-107550.

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6

Forshage, Mattias. "Systematics of Eucoilini : Exploring the diversity of a poorly known group of Cynipoid parasitic wasps." Doctoral thesis, Uppsala universitet, Systematisk biologi, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-109400.

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Many animal species are still undiscovered, even in Sweden. This thesis deals with the wasps of the subfamily Eucoilinae (of Figitidae, Cynipoidea), a poorly known group of small parasitoids of Dipteran flies. In this group, old classifications are chaotic, knowledge of old taxa is scant, phylogenetic work has recently started, and many new taxa remain to be described. In this thesis, an identification key is given to the European genera of Eucolinae, and a tribal classification of the subfamily is reintroduced, based on recent phylogenetic results. Most of the thesis focuses on the tribe Euco

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7

Lundberg, Magnus. "Systematics and polyploid evolution in Potentilleae (Rosaceae)." Doctoral thesis, Stockholms universitet, Botaniska institutionen, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-53967.

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This thesis comprises studies of the phylogenetic relationships in the flowering plant clade Potentilleae in Rosaceae. The relationships were elucidated by using DNA sequence data from the nuclear genome as well as from the plastid genome. In particular, the focus of the studies was the investigation of allopolyploidy, i.e. speciation as a result of hybridization and subsequent chromosome doubling. A phylogenetic method was used for identifying allopolyploidy through comparison of trees resulting from the analyses of different DNA sequences. Five sub-clades were investigated. First, both the s

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8

Kainulainen, Kent. "Evolution and biodiversity of the Ixoroideae (Rubiaceae)." Doctoral thesis, Stockholms universitet, Botaniska institutionen, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-48850.

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The phylogenetic relationships within subfamily Ixoroideae of the coffee family are investigated by phylogenetic reconstruction of molecular data, including regions of the chloroplast DNA (matK, ndhF, rbcL, rps16, trnH-psbA, trnS-G, and trnT-F), and the nuclear ribosomal DNA (ITS). The evolution of morphological characters within the group are inferred, with focus on characters used in classification. Ixoroideae have primarily been characterized by secondary pollen presentation, contorted corolla aestivation, and fleshy fruits. Secondary pollen presentation appears synapomorhic of a clade comp

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9

Castroviejo-Fisher, Santiago. "Species Limits, and Evolutionary History of Glassfrogs." Doctoral thesis, Uppsala universitet, Evolutionsbiologi, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-100923.

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Recognizing the mechanisms of speciation and the limits of species is essential to understand the origin of biodiversity and how to conserve it. The general aims of my investigations during my doctoral studies were two-fold: to study evolutionary patterns and processes, and to provide specific and superspecific taxonomic classifications that try to reflect evolutionary history. I have focused my research on anurans in their biodiversity hotspot, the American Tropics. I have used morphological, behavioral (mating calls), and genetic (DNA sequences) characters to study species boundaries between

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10

Eggens, Frida. "Systematics in Sileneae (Caryophyllaceae) : taxonomy and phylogenetic patterns /." Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-7380.

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