Technical comment on "The placental mammal ancestor and the post-K-Pg radiation of placentals".
editorial · Level V
Where this comes from
- Record sourced from PubMed, PMID 23929967.
- Also identified by DOI 10.1126/science.1238025.
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Abstract
O'Leary et al. (Research Article, 8 February 2013, p. 662) examined mammalian relationships and divergence times and concluded that a single placental ancestor crossed the Cretaceous-Paleogene (K-Pg) boundary. This conclusion relies on phylogenetic analyses that fail to discriminate between homology and homoplasy and further implies virus-like rates of nucleotide substitution in early Paleocene placentals.
Medical subject headings
- Biological Evolution
- Fossils
- Mammals
- Phylogeny