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  • 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

Art, Gattung, System eine logisch-systematische Analyse biologischer Grundbegriffe

Heuer, Peter January 2006 (has links)
Zugl.: Leipzig, Univ., Diss., 2006
2

Systematic revision of Astragalus sect. Adiaspastus, sect. Macrophyllium and sect. Pterophorus (Fabaceae) /

Zarre-Mobarakeh, Shahin. January 1998 (has links) (PDF)
Univ., Diss.--München, 1998. / Zsfassung in dt. Sprache.
3

Die infragenerische Gliederung der Gattung Bomarea Mirb. und die Revision der Untergattungen Sphaerine (Herb.) Baker und Wichuraea (M. Roemer) Baker (Alstroemeriaceae)

Hofreiter, Anton. Unknown Date (has links) (PDF)
Universiẗat, Diss., 2003--München.
4

Merkmalsgewichtung in der Systematik Zeichentheorie, Falsifikationisumus und Phylogenetik /

Vogt, Lars. January 2002 (has links) (PDF)
Bielefeld, Universiẗat, Diss., 2002. / Enth. 7 Sonderabdr. aus verschiedenen Zeitschr.
5

Molecular phylogenetics and taxonomic issues in dragonfly systematics (Insecta: Odonata)

Hovmöller, Rasmus January 2006 (has links)
<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 Palaeoptera. The second paper is about the phylogeny of the Holarctic dragonfly <i>Leucorrhinia</i>. Dragonfly larvae are frequently equipped with spines on the abdomen, with great variation in spinyness between species. From an analysis of sequences of ITS and 5.8S rDNA it was found that spines have been lost at least twice in <i>Leucorrhinia,</i> in the European<i> L. rubicunda</i> and again in a clade of North American species. The third paper is on the subfamily Ischnurinae (Odonata: Coenagrionidae), a group dominated by the two larger genera Ischnura and Enallagma along with several mono- or oligotypic genera. From the presented molecular study, using mitochondrial 16S rDNA and COII sequences, it is demonstrated that Ischnurinae, and Ischnura are monophyletic. Enallagma is not monophyletic, and the genus name Enallagma should be restricted to the <i>E. cyathigerum </i>clade. he fourth paper is a catalog of the genus Coenagrion, with full information on synonymy, type material and bibliographical data. The fifth paper is an appeal to the International Commission on Zoological Nomenclature to suppress the genus group name Agrion. The letter of appeal elucidates the priority of Agrion, and demonstrates why it has fallen out of use. A case if made for why Agrion should be placed on the list of unavailable names, and Calopteryx given full validity.</p>
6

Phylogenetic relationships of the "Briza complex" to other members of the subfamily Pooideae (Poaceae) : Based on molecular data from the nuclear regions ITS and GBSSI, and the chloroplast gene matK

Persson, Nannie January 2015 (has links)
No description available.
7

Paraphyly of the Malagasy genus Carphalea (Rubiaceae, Rubioideae, Knoxieae) and its taxonomic implications

Ferm, Julia January 2013 (has links)
No description available.
8

New insights into the deep divergences of Ephedra (Gnetales) using molecular data

Thureborn, Olle January 2014 (has links)
No description available.
9

Molecular phylogenetics and taxonomic issues in dragonfly systematics (Insecta: Odonata)

Hovmöller, Rasmus January 2006 (has links)
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 Palaeoptera. The second paper is about the phylogeny of the Holarctic dragonfly Leucorrhinia. Dragonfly larvae are frequently equipped with spines on the abdomen, with great variation in spinyness between species. From an analysis of sequences of ITS and 5.8S rDNA it was found that spines have been lost at least twice in Leucorrhinia, in the European L. rubicunda and again in a clade of North American species. The third paper is on the subfamily Ischnurinae (Odonata: Coenagrionidae), a group dominated by the two larger genera Ischnura and Enallagma along with several mono- or oligotypic genera. From the presented molecular study, using mitochondrial 16S rDNA and COII sequences, it is demonstrated that Ischnurinae, and Ischnura are monophyletic. Enallagma is not monophyletic, and the genus name Enallagma should be restricted to the E. cyathigerum clade. he fourth paper is a catalog of the genus Coenagrion, with full information on synonymy, type material and bibliographical data. The fifth paper is an appeal to the International Commission on Zoological Nomenclature to suppress the genus group name Agrion. The letter of appeal elucidates the priority of Agrion, and demonstrates why it has fallen out of use. A case if made for why Agrion should be placed on the list of unavailable names, and Calopteryx given full validity.
10

Phylogenetische Analysen und antigenetische Verwandtschaft von Pestiviren /

Avalos Ramirez, Ramiro. January 2002 (has links)
Giessen, Universität, Thesis (doctoral), 2002.

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