DNA evidence for a Paleocene origin of the Alcidae (Aves: Charadriiformes) in the Pacific and multiple dispersals across northern oceans

Molecular Phylogenetics and Evolution
Sergio L Pereira, Allan J Baker

Abstract

The Alcidae is a group of marine, wing-propelled diving birds known as auks that are distributed along the coasts of the northern oceans. It has been suggested that auks originated in the Pacific coastal shores as early as the Miocene, and dispersed to the Atlantic either through the Arctic coasts of Eurasia and North America (northern dispersal route), or through upwelling zones in the coastal areas of California to Florida (southern dispersal route), before the closure of the Isthmus of Panama in the Pliocene. These hypotheses have not been tested formally because proposed phylogenies failed to recover fully bifurcating, well-supported phylogenetic relationships among and within genera. We therefore constructed a large data set of mitochondrial and nuclear DNA sequences for 21 of the 23 species of extant auks. We also included sequences from two other extant and one extinct species retrieved from GenBank. Our analyses recovered a well-supported phylogenetic hypothesis among and within genera. Aethia is the only genus for which we could not obtain strong support for species relationships, probably due to incomplete lineage sorting. By applying a Bayesian method of molecular dating that allows for rate variation across lineages...Continue Reading

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Citations

May 22, 2013·Proceedings of the National Academy of Sciences of the United States of America·Kyle H ElliottGail K Davoren
Mar 11, 2008·BMC Evolutionary Biology·Erika S Tavares, Allan J Baker
Nov 1, 2011·Frontiers in Zoology·Petra QuillfeldtSantiago Merino
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Dec 12, 2020·Ecology and Evolution·Filipe Garrett VieiraM Thomas P Gilbert
Jun 18, 2021·Genes & Genetic Systems·Shizuka SakurayamaTakashi Kitano

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