Comparação entre as medidas corporais de pipra fasciicauda scarlatina das regiões amazônica e Brasil central

Abstract

Pipra fasciicauda scarlatina is a small (ca. 10g) species of passerine that lives in the understory forests of the Amazon, Central Brazil (including western Minas Gerais), and western São Paulo. Throughout this distribution, P.f scarlatina does not show any differences in plumage. This paper aimed to examine geographic variation in size in P.I scarlatina, comparing specimens from three biogeographic regions in the Amazon (endemic areas Rondônia, Pará and Belém) and Central Brazil. We examined 219 specimens of P.I scarlatina from the serial collection of the Museu Paraense Emílio Goeldi. From each specimen the following morphometric variables were taken: length of the culm, length of the bill from the nostril, height of the bill, gape (width of the bill at the angle of the mouth), wing length, tail length, hind toe length and hind claw length. Results indicate significant sexual dimorphism in some measurements in the endemic areas: Rondônia (wing and claw), Pará (wing, tail, culmen, nostril and claw), Belém (wing, tail, culmen, nostril and claw) and Central Brazil (tail, nostril and claw). Comparing the body measurements of the Amazon and Central Brazil populations, males show significant differences in gape and wing, while females show significant differences in gape, wing, and nail. This suggests that there are significant morphometric differences between populations