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Phylogeny and character evolution in the Empidonax group of tyrant flycatchers (Aves: Tyrannidae): a test of W. E. Lanyon's hypothesis using mtDNA sequences.
Mol Phylogenet Evol. 2002 Feb; 22(2):289-302.MP

Abstract

We sequenced mitochondrial DNA from four protein-coding genes for 26 taxa to test W. E. Lanyon's hypothesis of intergeneric relationships and character evolution in the Empidonax group of tyrant flycatchers. Three genera in this group (Empidonax, Contopus, and Sayornis) successfully occupy north temperate habitats for breeding, while the remaining genera (Mitrephanes, Cnemotriccus, Aphanotriccus, Lathrotriccus, and Xenotriccus) are restricted to neotropical latitudes. Lanyon hypothesized two major clades in the group based on differences in syringeal morphology and proposed relationships among genera using a combination of morphologic, behavioral, and allozymic characters. The mtDNA data strongly support Lanyon's division of genera into two clades. In addition, the molecular and nonmolecular data sets agree in uniting Aphanotriccus and Lathrotriccus as sister taxa, with Cnemotriccus as basal to these genera. Species of Aphanotriccus, Lathrotriccus, and Cnemotriccus form a clade that exploits a distinctive nesting niche relative to other members of the Empidonax group. Within the second major clade, mtDNA sequences support a reconstruction based on allozymes that places Contopus and Empidonax as sister taxa. This hypothesis contradicts that of Lanyon, who allied Contopus with Mitrephanes on the basis of similarity in foraging mode. Genera in the Empidonax group are members of a larger assemblage that radiated in South America. Occupancy of temperate habitats by certain genera in this group is coincident with their evolution of migratory behavior and with independent diversification in foraging modes that reduces potential competition in sympatry.

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Authors+Show Affiliations

Cicero C
Museum of Vertebrate Zoology, University of California at Berkeley, Berkeley, California 94720, USA.
Johnson NK
No affiliation info available

MeSH

Cytochrome b GroupDNADNA, MitochondrialElectron Transport Complex IVEvolution, MolecularGenetic VariationMolecular Sequence DataNADH DehydrogenasePhylogenySequence Analysis, DNASongbirds

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

11820849

Citation

Cicero, Carla, and Ned K. Johnson. "Phylogeny and Character Evolution in the Empidonax Group of Tyrant Flycatchers (Aves: Tyrannidae): a Test of W. E. Lanyon's Hypothesis Using mtDNA Sequences." Molecular Phylogenetics and Evolution, vol. 22, no. 2, 2002, pp. 289-302.
Cicero C, Johnson NK. Phylogeny and character evolution in the Empidonax group of tyrant flycatchers (Aves: Tyrannidae): a test of W. E. Lanyon's hypothesis using mtDNA sequences. Mol Phylogenet Evol. 2002;22(2):289-302.
Cicero, C., & Johnson, N. K. (2002). Phylogeny and character evolution in the Empidonax group of tyrant flycatchers (Aves: Tyrannidae): a test of W. E. Lanyon's hypothesis using mtDNA sequences. Molecular Phylogenetics and Evolution, 22(2), 289-302.
Cicero C, Johnson NK. Phylogeny and Character Evolution in the Empidonax Group of Tyrant Flycatchers (Aves: Tyrannidae): a Test of W. E. Lanyon's Hypothesis Using mtDNA Sequences. Mol Phylogenet Evol. 2002;22(2):289-302. PubMed PMID: 11820849.
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TY - JOUR T1 - Phylogeny and character evolution in the Empidonax group of tyrant flycatchers (Aves: Tyrannidae): a test of W. E. Lanyon's hypothesis using mtDNA sequences. AU - Cicero,Carla, AU - Johnson,Ned K, PY - 2002/2/1/pubmed PY - 2002/4/4/medline PY - 2002/2/1/entrez SP - 289 EP - 302 JF - Molecular phylogenetics and evolution JO - Mol Phylogenet Evol VL - 22 IS - 2 N2 - We sequenced mitochondrial DNA from four protein-coding genes for 26 taxa to test W. E. Lanyon's hypothesis of intergeneric relationships and character evolution in the Empidonax group of tyrant flycatchers. Three genera in this group (Empidonax, Contopus, and Sayornis) successfully occupy north temperate habitats for breeding, while the remaining genera (Mitrephanes, Cnemotriccus, Aphanotriccus, Lathrotriccus, and Xenotriccus) are restricted to neotropical latitudes. Lanyon hypothesized two major clades in the group based on differences in syringeal morphology and proposed relationships among genera using a combination of morphologic, behavioral, and allozymic characters. The mtDNA data strongly support Lanyon's division of genera into two clades. In addition, the molecular and nonmolecular data sets agree in uniting Aphanotriccus and Lathrotriccus as sister taxa, with Cnemotriccus as basal to these genera. Species of Aphanotriccus, Lathrotriccus, and Cnemotriccus form a clade that exploits a distinctive nesting niche relative to other members of the Empidonax group. Within the second major clade, mtDNA sequences support a reconstruction based on allozymes that places Contopus and Empidonax as sister taxa. This hypothesis contradicts that of Lanyon, who allied Contopus with Mitrephanes on the basis of similarity in foraging mode. Genera in the Empidonax group are members of a larger assemblage that radiated in South America. Occupancy of temperate habitats by certain genera in this group is coincident with their evolution of migratory behavior and with independent diversification in foraging modes that reduces potential competition in sympatry. SN - 1055-7903 UR - https://www.unboundmedicine.com/medline/citation/11820849/Phylogeny_and_character_evolution_in_the_Empidonax_group_of_tyrant_flycatchers__Aves:_Tyrannidae_:_a_test_of_W__E__Lanyon's_hypothesis_using_mtDNA_sequences_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S1055790301910541 DB - PRIME DP - Unbound Medicine ER -