Sentences with phrase «phylogenetic hypotheses»

Her research combines the disciplines of paleontology, comparative anatomy, and development to formulate and test phylogenetic hypotheses of vertebrate interrelationships.

Although variation in the premolar root complex has informed taxonomic and phylogenetic hypotheses for these fossil hominin species, traditionally there has been a focus on external root form, number, and position.

A phylogenetic hypothesis for passerine birds: Taxonomic and biogeographic implications of an analysis of nuclear DNA sequence data

«Although our analysis suggests that the new specimen may represent the most phylogenetically basal Cretaceous bird known to date, this phylogenetic hypothesis should be treated with caution given the incomplete preservation of the skeleton and low phylogenetic support values,» said lead author Dr. WANG Min, Institute of Vertebrate Paleontology and Paleoanthropology (IVPP) of the Chinese Academy of Sciences.

Not exact matches

Study co-author and current Managing Director of the Max Planck Institute for the Science of Human History Professor Russell Gray states, «This study shows the power of computational phylogenetic methods to test causal hypotheses about human history.»

The article published on the journal Molecular Biology and Evolution provides the framework for posing new hypotheses on the phylogenetic relations among poriferans, determining gene function in sponges and the early evolution of molecular complexity in metazoans.

«To test these different hypotheses and determine the phylogenetic position of the new primate, we developed a massive data matrix including more than 1000 anatomical characters and scored for 157 mammals,» says Dr. Jin Meng.

We test this hypothesis through phylogenetic analysis on 48 avian genomes we collected or assembled, representing all commonly accepted extant neognath orders (36, 37) and two palaeognaths, with several nonavian reptiles and human as outgroups.

Through phylogenetic analysis, the research team discovered that modern deep - sea mussels are the descendants of shallow - water mussels, and their ancestors migrated to the deep sea approximately 110 million years ago, providing evidence to support a hypothesis that their ancestors survived through an extinction event during the global anoxia period associated with the Palaeocene - Eocene Thermal Maximum which occurred around 57 million years ago.

«To test these different hypotheses and determine the phylogenetic position of the new primate, we developed a massive data matrix including more than 1000 anatomical characters and scored for 157 mammals,» said Dr. Jin Meng.

Guy Beauchamp & Esteban Fernández - Juricic — 2004 (6)([email protected]) Keywords: birds, flock size, forebrain size, phylogenetic analysis, social complexity hypothesis

Phylogenetic studies can test hypotheses of taxonomic definitions and evolutionary relationships.

Radiocarbon analyses of 14C in lipid biomarkers associated with marine plankton [14], and 13C - labeled bicarbonate tracer studies [15] suggest that marine Crenarchaeota are capable of light - independent autotrophic carbon assimilation into membrane lipid biomass, an hypothesis further strengthened by recent single cell phylogenetic identification and autoradiographic verification of carbon dioxide incorporation [16].

Phylogenetic relationships of the nematomorpha - a discussion of current hypotheses.