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3 results for “crown position”
The impact of molecular data on the phylogenetic position of the putative oldest crown crocodilian and the age of the clade
The use of molecular data for living groups is vital for interpreting fossils, especially when morphology-only analyses retrieve problematic phylogenies for living forms. These topological discrepancies impact on the inferred phylogenetic position of many fossil taxa. In Crocodylia, morphology-based phylogenetic inferences differ fundamentally in placing <i>Gavialis</i> basal to all other living forms, whereas molecular data consistently unite it with crocodylids. The Cenomanian <i>Portugalosuchus azenhae </i>was recently described as the oldest crown crocodilian, with affinities to <i>Gavialis</i>, based on morphology-only analyses, thus representing a potentially important new molecular clock calibration. Here we performed analyses incorporating DNA data into these morphological datasets, using scaffold and supermatrix (total evidence) approaches, in order to evaluate the position of basal crocodylians including <i>Portugalosuchus</i>. Our analyses incorporating DNA data robustly recovered <i>Portugalosuchus</i> outside Crocodylia (as well as thoracosaurs, planocraniids and <i>Borealosuchus</i> spp.), questioning the status of <i>Portugalosuchus</i> a crown crocodilian and any future use as a node calibration in molecular clock studies. Finally, we discuss how, with the increasing size of phylogenomic datasets, the molecular scaffold might be an efficient (though imperfect) approximation of more rigorous but demanding supermatrix analyses.
The impact of molecular data on the phylogenetic position of the putative oldest crown crocodilian and the age of the clade
Open the record for dataset details and reuse information.
Association of Implant Position and Crown Contour With Tissue Health
ClinicalTrials.gov study NCT05644470. IPD Sharing: NO. Countries: 1. Publications: 4.
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
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DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.