Data from: Heterogeneous models place the root of the placental mammal phylogeny

• Main Authors: Morgan, Claire C., Foster, Peter G., Webb, Andrew E., Pisani, Davide, McInerney, James O., O'Connell, Mary J.
• Format: Dataset
• Language: unknown
• Published: 2013
• Subjects: Life sciences; medicine and health care; Equus caballus; Mus musculus; Ochotona princeps; evolutionary models; Macropus eugenii; Callithrix jacchus; Rattus norvegicus; phylogenetic reconstruction; Macaca mulatta; Canis familiaris; Gorilla gorilla; Felis catus; Ursus maritimus; Oryctolagus cuniculus; Pteropus vampyrus; Erinaceus europaeus; mammal phylogeny; Vicugna pacos; Microcebus murinus; Pongo abelii; Cavia porcellus; Monodelphis domestica; Otolemur garnettii; Gallus gallus; Spermophilus tridecemlineatus; Choloepus hoffmanni; Procavia capensis; Ornithorhynchus anatinus; Heterogeneous modelling; Tupaia belangeri; Loxodonta africana; Echinops telfairi; Homo Sapiens; Pan troglodytes; Dasypus novemcinctus; Bos taurus; Dipodomys ordii; Tursiops truncatus; Sorex araneus; Tarsius syrichta; Myotis lucifugus; Placental Root; Sus scrofa; Ailuropoda melanoleuca; envir; stat
• Online Access: https://doi.org/10.5061/dryad.vh49j

Heterogeneity among life traits in mammals has resulted in considerable phylogenetic conflict, particularly concerning the position of the placental root. Layered upon this are gene- and lineage-specific variation in amino acid substitution rates and compositional biases. Life trait variations that may impact upon mutational rates are longevity, metabolic rate, body size and germ line generation time. Over the past 12 years, three main conflicting hypotheses have emerged for the placement of the placental root. These hypotheses place: the Atlantogenata (common ancestor of Xenarthra plus Afrotheria), the Afrotheria, or the Xenarthra as the sister group to all other placental mammals. Model adequacy is critical for accurate tree reconstruction and by failing to account for these compositional and character exchange heterogeneities across the tree and dataset, previous studies have not provided a strongly supported hypothesis for the placental root. For the first time, models that accommodate both tree and dataset heterogeneity have been applied to mammal data. Here we show the impact of accurate model assignment and the importance of datasets in accommodating model parameters while maintaining the power to reject competing hypotheses. Through these sophisticated methods, we demonstrate the importance of model adequacy, dataset power and provide strong support for the Atlantogenata over other competing hypotheses for the position of the placental root. Phylogenies obtained using variety of heterogeneous modelsMorganCC_Phylogenies.xls39TaxonSetAlignment data from 39 species in three formats: nucleotide (39TaxonSet_aa), amino acid (39TaxonSet_day) and dayhoff 6 recoded (39TaxonSet_day).