INVESTIGADORES
BERTELLI Sara Beatriz
congresos y reuniones científicas
Título:
A phylogenetic study of tinamous (Aves: Palaeognathae) based on morphology
Autor/es:
BERTELLI, S.
Lugar:
Seattle
Reunión:
Congreso; One Hundred and Nineteenth Stated Meeting of the American Ornithologists' Union; 2001
Institución organizadora:
American Ornithologists' Union
Resumen:
Tinamous are terrestrial brds endemic to the neotropical region. Interest in this group derives from the fact that tinamous are basal among extant birds and very little is known about the phylogenetic relationships within the family. In this study, a cladistic analysis was conducted including 31 species of tinamous in a matrix of 90 osteological and 15 myological characters. The programs EST and NONA produced 15 distinct optimal trees of 325 steps. The phylogenetic hypoteses here presented do not recover the Tinaminae (forest-dwelling tinamous) äs originally proposed by other authors (Tinamus + Nothocercus + Cryptureilus). Tinaminae is instead paraphyletic, and its ecological niche is plesiomorphic. Among the forest-dwelling tinamous, Tinamus and Nothocercus are monophyletic groups and the monophyly of Cryptureilus is not supported. The genus Nothocercus has a basal position within Tinamidae. The present analysis, in contrast, Supports the monophyly of Nothurinae (open areas tinamous, Taoniscus+ Nothura + Nothoprocta + Eudromia+ Tinamotis + Rhynchotus). Among the open areas tinamous, Taoniscuss basal to Nothurinae, and Tinamotis and Eudromia appear to be more closed related to Rhynchotus than to Nothura and Nothoprocta, Except for Nothura, the monophyly of the genera in the group of open area tinamids is recovered. These hypothesesagreewith the results of other morphological studies based on integumentary characters. Comparison among both analyses shows significant congruence.