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Dissection and Explant Culture of Murine Allantois for the In Vitro Analysis of Allantoic Attachment
Published on: January 13, 2018
Technical comment on "The placental mammal ancestor and the post-K-Pg radiation of placentals"
Mark S Springer1, Robert W Meredith, Emma C Teeling
1Department of Biology, University of California, Riverside, CA 92521, USA. mark.springer@ucr.edu
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.
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