Journal
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
Volume 371, Issue 1699, Pages -Publisher
ROYAL SOC
DOI: 10.1098/rstb.2015.0140
Keywords
phylogenomics; time-tree; supermatrix; coalesence; fossils; molecules
Categories
Funding
- European Research Council [ERC-20120StG311000]
- NSF United States [DEB-1457735]
- Direct For Biological Sciences
- Division Of Environmental Biology [1457735] Funding Source: National Science Foundation
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Most molecular phylogenetic studies place all placental mammals into four superordinal groups, Laurasiatheria (e.g. dogs, bats, whales), Euarchontoglires (e.g. humans, rodents, colugos), Xenarthra (e.g. armadillos, anteaters) and Afrotheria (e.g. elephants, sea cows, tenrecs), and estimate that these clades last shared a common ancestor 90-110 million years ago. This phylogeny has provided a framework for numerous functional and comparative studies. Despite the high level of congruence among most molecular studies, questions still remain regarding the position and divergence time of the root of placental mammals, and certain 'hard nodes' such as the Laurasiatheria polytomy and Paenungulata that seem impossible to resolve. Here, we explore recent consensus and conflict among mammalian phylogenetic studies and explore the reasons for the remaining conflicts. The question of whether the mammal tree of life is or can be ever resolved is also addressed. This article is part of the themed issue 'Dating species divergences using rocks and clocks'.
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