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Phylogeny and biogeographical history of Trogoniformes, a pantropical bird order

2005/03/21 by Robert G. Moyle · 4 citations
Earth and Planetary Sciences · Agricultural and Biological Sciences · #Evolution and Paleontology Studies #Paleontology and Evolutionary Biology #Plant Diversity and Evolution

paper · doi:10.1111/j.1095-8312.2005.00435.x

openalex publication_date 2005/03/21 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/30

Abstract

With highly conserved morphology throughout the family, a tropical distribution, and no close living relatives, the trogons (Aves: Trogonidae) pose a difficult problem for systematists. Disjunct tropical distributions are often attributed to Gondwanan vicariance, but the fossil record for trogons is mostly from the Tertiary of Europe. This study examined support for the basal relationships among trogons using a combination of nuclear (RAG-1) and mitochondrial (ND2) DNA sequence data. Although some nodes could not be resolved with significant support, there is strong support for the basal position of three New World genera (Pharomachrus, Euptilotis, and Priotelus). This phylogenetic hypothesis differs markedly from previous studies of trogon relationships and taxonomic treatments. Biogeographically, it implies an origin and early vicariance events for the crown clade in the New World. Molecular divergence estimates place all of the basal nodes of the trogon phylogeny in the Oligocene, precluding a Gondwanan origin for modern trogons.

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