Results 11 to 20 of about 310,185 (183)

Virus taxonomy: the database of the International Committee on Taxonomy of Viruses (ICTV) [PDF]

open access: yes, 2017
The International Committee on Taxonomy of Viruses (ICTV) is charged with the task of developing, refining, and maintaining a universal virus taxonomy.
Dempsey, Donald M.   +5 more
core   +3 more sources

Pterodactylus scolopaciceps Meyer, 1860 (Pterosauria, Pterodactyloidea) from the Upper Jurassic of Bavaria, Germany:the problem of Cryptic Pterosaur Taxa in early ontogeny [PDF]

open access: yes, 2014
The taxonomy of the Late Jurassic pterodactyloid pterosaur Pterodactylus scolopaciceps Meyer, 1860 from the Solnhofen Limestone Formation of Bavaria, Germany is reviewed. Its nomenclatural history is long and complex, having been synonymised with both P.
Martill, David M., Vidovic, Steven U.
core   +5 more sources

A Quantitative Sequencing Framework for Absolute Abundance Measurements of Mucosal and Lumenal Microbial Communities [PDF]

open access: yes, 2020
A fundamental goal in microbiome studies is determining which microbes affect host physiology. Standard methods for determining changes in microbial taxa measure relative, rather than absolute abundances.
Barlow, Jacob T.   +2 more
core   +1 more source

Rates of agonism among female primates: a cross-taxon perspective [PDF]

open access: yes, 2013
Agonism is common in group-living animals, shaping dominance relationships and ultimately impacting individual tness. Rates of agonism vary considerably among taxa, however, and explaining this variation has been central in ecological models of female ...
Altmann   +131 more
core   +1 more source

EM for phylogenetic topology reconstruction on non-homogeneous data [PDF]

open access: yes, 2014
Background: The reconstruction of the phylogenetic tree topology of four taxa is, still nowadays, one of the main challenges in phylogenetics. Its difficulties lie in considering not too restrictive evolutionary models, and correctly dealing with the ...
Casanellas, Marta, Ibáñez, Esther
core   +6 more sources

Taxon Sampling, Bioinformatics, and Phylogenomics [PDF]

open access: yesSystematic Biology, 2003
Taxon sampling is often thought to be of extreme importance for phylogenetic inference, and increased sampling of taxa is commonly advocated as a solution to resolving problematic phylogenies. Another solution is to increase the number of sites (by sequencing additional genes) sampled for each taxon.
Michael S. Rosenberg, Sudhir Kumar
openaire   +3 more sources

A generalized taxon concept [PDF]

open access: yesBotanical Journal of the Linnean Society, 1997
Abstract A generalized taxon concept (GTC) is proposed with a method for revealing and ranking difficult taxa at any level in the taxonomic hierarchy. The method is based on cluster quality, defined jointly by the compactness of a cluster's contents and its isolation from its informational neighbours.
openaire   +2 more sources

Regional invertebrate cross- and within-taxon surrogacy are scale and taxon dependent [PDF]

open access: yesTransactions of the Royal Society of South Africa, 2019
This study measured within- and cross-taxon congruence in the diversity of epigeal invertebrates (spiders, beetles and millipedes) and woody vegetation sampled at small spatial grains (0.25 ha) across a large area (30 000 km2) within the Vhembe Biosphere Reserve (VBR) in South Africa.
Michelle Hamer   +4 more
openaire   +2 more sources

W(h)ither Fossils? Studying Morphological Character Evolution in the Age of Molecular Sequences [PDF]

open access: yes, 2008
A major challenge in the post-genomics era will be to integrate molecular sequence data from extant organisms with morphological data from fossil and extant taxa into a single, coherent picture of phylogenetic relationships; only then will these ...
Bull J. J.   +21 more
core   +2 more sources

Inferring ancestral sequences in taxon-rich phylogenies [PDF]

open access: yes, 2010
Statistical consistency in phylogenetics has traditionally referred to the accuracy of estimating phylogenetic parameters for a fixed number of species as we increase the number of characters. However, as sequences are often of fixed length (e.g.
Gascuel, Olivier, Steel, Mike
core  

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