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Tyrant-flycatchers (Tyrannidae)

Golden-bellied Flycatcher (Myiodynastes hemichrysus) - HBW 9, p. 412

French: Tyran à ventre d'or German: Braunbart-Maskentyrann Spanish: Bienteveo Ventridorado

Taxonomy: Hypermitres hemichrysus Cabanis, 1861, Los Frailes, Costa Rica.
Affinities of genus uncertain; long hypothesized as being closest to Conopias, largely on basis of similar hole-nesting tendencies. Genus probably monophyletic, although this only weakly supported by recent analyses of molecular-sequence data (likely due to inappropriate markers for the apparently long branches and deep level of divergence within genus). Results of separate analyses of plumage/syringeal morphology and molecular data were not completely congruent, but do suggest some strong tentative conclusions. Present species and M. chrysocephalus originally considered conspec.. View all taxonomy...

Taxonomy: Hypermitres hemichrysus Cabanis, 1861, Los Frailes, Costa Rica.
Affinities of genus uncertain; long hypothesized as being closest to Conopias, largely on basis of similar hole-nesting tendencies. Genus probably monophyletic, although this only weakly supported by recent analyses of molecular-sequence data (likely due to inappropriate markers for the apparently long branches and deep level of divergence within genus). Results of separate analyses of plumage/syringeal morphology and molecular data were not completely congruent, but do suggest some strong tentative conclusions. Present species and M. chrysocephalus originally considered conspecific; recovered as sister-taxa under certain coding schemes of morphological characters, and as a clade with very strong bootstrap support in all analyses of molecular data. Monotypic.

Distribution: Costa Rica (S from Volcán Miravalles, in Cordillera de Guanacaste) and W Panama (E to Veraguas).

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