Genetic data (Moyle 2005, DaCosta and Klicka 2008, Ornelas et al. Orders that consists of the Coraciiformes, Piciformes, Bucerotiformes, andĢ005) suggest that the quetzals ( Pharomachrus + Euptilotis) mightīe basal to all other trogons, including Old World genera. Strong support for their traditional position: they are members of a group of
The Coliiformes (mousebirds), whereas other genetic data (Fain & HoudeĢ004) support a sister relationship with the Old World Bucerotidae. Genetic (Espinosa de los Monteros 2000) data suggest a sister relationship with A recent analysis of morphological data (MayrĢ003b, Mayr & Clarke 2003) suggested that the Steatornithidae and the (Sibley & Ahlquist 1990) are consistent with this view. (1990), Espinosa de los Monteros (2000), and Mayr (2003) some genetic data That includes Coraciiformes + Piciformes see reviews in Sibley & Ahlquist More closely related to the Coraciiformes than to other orders, or to a group Traditional classifications have considered the Trogonidae to be Has never been questioned its relationships to other birds, however, are Trogon personatus Masked Trogon 6, 10, 10a Trogon rufus Black-throated Trogon 6, 7, 7c Trogon curucui Blue-crowned Trogon 6, 7, 7a, 7b Trogon melanurus Black-tailed Trogon 11, 12 Trogon massena Slaty-tailed Trogon 11, 12 Pharomachrus antisianus Crested Quetzal 17, 19 Pharomachrus fulgidus White-tipped Quetzal 17, 18 Pharomachrus auriceps Golden-headed Quetzal 16, 16b Pharomachrus pavoninus Pavonine Quetzal 16
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