Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 8 of 8 for “"Cryptic Speciation"”.
-
Phylogeograpy of Aphanicercella cassida (Plecoptera : Notonemourida) : cryptic speciation?
… the population of A. cassida in Mpumalanga is a cryptic species. More sampling has to be done within the studied populations and more populations should be added to the analysis before any definite decision can be made regarding this fascinating emergence of possible cryptic species in South …
-
Helping to Resolve Taxonomic Conflicts within the Genus Amblyomma (Acari:Ixodidae) from a Molecular Perspective
… The data obtained supported the hypothesis of cryptic speciation occurring within <em>A. parvum, </em>with the northern populations of Central America being a different species from the one occurring in the southern latitudes, mainly in Brazil and Argentina. As for the <em>A. maculatum …
-
Comparative Phylogeography of Glassfrogs (Vitreorama) Endemic to the Brazilian Altantic Rainforest
… of demographic change. My molecular data suggest cryptic speciation and the possibility of a third Vitreorana species inhabiting the AF. Intraspecific phylogenies indicate significant regional structure in both species, with a phylogeographical break in São Paulo State that matches breaks found in …
-
DNA+eDNA: integration of traditional and emerging tools for monitoring marine ecosystems
… often struggles with the identification of cryptic species, leading to the reliance on molecular methods such as DNA analysis. These techniques have improved species identification, revealed cryptic speciation, and informed fisheries management by delineating stock boundaries, tracking …
-
A circumscription of the earth tongue fungi class Geoglossomycetes
… from the genus Geoglossum. We described the cryptic species Glutinoglossum heptaseptatum, that was separated from Glutinoglossum glutinosum by molecular and morphological data. Additionally, we described the genus Sabuloglossum to accommodate the species, Sabuloglossum arenarium, a species …
-
Dispersal, gene flow, niche divergence and local adaptation in the hyper-diverse ruschioid Aizoaceae: testing alternative modes of speciation in the Knersvlakte quartz field flora of the Succulent Karoo, South Africa
What are the roles of alternative modes of speciation in the generation of biological diversity? This question is fundamental to the debate surrounding the origins of extraordinarily diverse regions and clades. Diversification in the Cape flora of South Africa has been intensively studied owing to …
-
Systematics and Ecology of Truffles (Tuber)
… Tuberaceae. Chapter 3 is focused on issues of cryptic speciation and taxonomy within the Tuber gibbosum clade. The four species resolved in the Gibbosum clade appear to be endemic to the Pacific Northwest and associated primarily with Gymnosperms. Chapter 4 is a meta-analysis of all known Tuber …
-
Molecular phylogeny, temporal patterns of lineage diversification and phylogeography of the surgeonfish genus Naso (Acanthuridae)
… and productivity regimes. To examine further speciation events and the underlying processes, several comparative phylogeographic studies were undertaken. For this purpose, a Naso-specific fast evolving mitochondrial marker was designed from the control region (d-loop). Firstly, a widely …