Sökning: "cryptic species"

Visar resultat 6 - 10 av 50 avhandlingar innehållade orden cryptic species.

1. 6. Diversity Underfoot : Systematics and Biogeography of the Dictyostelid Social Amoebae

   Författare :Allison L Perrigo; Sandra Baldauf; Maria Romeralo; David Bass; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Amoeba; biogeography; cryptic species; dictyostelid; latitudinal gradient; multicellularity; protist; social amoeba; phylogenetics; systematics; new species; Biology with specialization in Systematics; Biologi med inriktning mot systematik;

   Sammanfattning : Dictyostelids (Amoebozoa) are a group of social amoebae consisting of approximately 150 species, which are found in terrestrial habitats worldwide. They are divided into eight major clades based on molecular phylogeny, and within these clades are many species complexes. LÄS MER

3. 7. Taxonomy and Systematics of Thelephorales – Glimpses Into its Hidden Hyperdiversity

   Författare :Sten Svantesson; Göteborgs universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Thelephorales; Tomentella; Polyozellus; Pseudotomentella; Amaurodon; Hydnellum; Sarcodon; species delimitation; cryptic species; molecular systematics; ectomycorrhiza; basidiomata shape;

   Sammanfattning : The order Thelephorales is a widespread group of many thousands of species of ecologically important, ectomycorrhizal fungi, of which only a fraction have been described to date. Most species are corticioid (skin-like) and form complexes of morphologically similar, closely related species. LÄS MER

4. 8. Gastrotricha of Sweden - Biodiversity and Phylogeny

   Författare :Tobias Kånneby; Ulf Jondelius; M. Antonio Todaro; Sven Boström; Rick Hochberg; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; taxonomy; systematics; phylogeny; new species; cryptic species; Chaetonotidae; Dasydytidae; Thaumastodermatidae; Systematic Zoology; zoologisk systematik och evolutionsforskning; Livets mångfald;

   Sammanfattning : Gastrotricha are small aquatic invertebrates with approximately 770 known species. The group has a cosmopolitan distribution and is currently classified into two orders, Chaetonotida and Macrodasyida. The gastrotrich fauna of Sweden is poorly known: a couple of years ago only 29 species had been reported. LÄS MER

5. 9. Species Delimitation and Phylogenetic Relationships. A study of Silene sections Atocion and Cryptoneurae

   Författare :Zeynep Aydin; Göteborgs universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Caryophyllaceae; Silene; Section Atocion; S. ertekinii; S. cryptoneura; S. aegyptiaca; SystematicsPhylogenetics; Species delimitation; Multispecies coalescent; Marginal likelihood; Species tree; DISSECT.;

   Sammanfattning : Abstract The existence of conflicting genealogies of different genes through the evolution of species complicates the inference of phylogenetic relationships. The Multispecies Coalescent (MSC) model provides a theoretical background that account for the stochasticity in the genealogical process, thus providing systematists with a potentially objective way of testing alternative hypotheses of putative species. LÄS MER

7. 10. Cryptic Female Choice and Male Mating Behaviour : Sexual Interactions in Beetles

   Författare :Martin Edvardsson; Göran Arnqvist; Paul Ward; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Biology; Cryptic female choice; Copulatory courtship; Harmful male traits; Nuptial gifts; Sperm competition; Sexual selection; Tribolium castaneum; Callosobruchus maculatus; Biologi; Biology; Biologi;

   Sammanfattning : The importance of cryptic female choice, i.e. female post-copulatory influence over male reproductive success, in driving the evolution of male traits remains controversial. The main aim of this thesis was to understand the post-copulatory consequences of sexual interactions and the importance of cryptic female choice in two species of beetle. LÄS MER