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Master's Dissertation
DOI
https://doi.org/10.11606/D.38.2021.tde-15042021-145531
Document
Author
Full name
Juan Camilo Ríos Orjuela
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2021
Supervisor
Committee
Silveira, Luis Fábio (President)
Bocalini, Fernanda
Emán, Jorge Luis Pérez
Title in Spanish
Revisión taxonómica de una especie neotropical ampliamente distribuida: el complejo Myiozetetes cayanensis (Linnaeus, 1766) (Aves: Tyrannidae)
Keywords in Spanish
Distribución geográfica
Límites entre especies.
Myiozetetes
Taxonomía
Abstract in Spanish
El complejo Myiozetetes cayanensis está compuesto actualmente por cuatro subespecies: M. c. cayanensis, M. c. hellmayri, M. c. rufipennis y M. c. erythropterus. Estos taxones se distribuyen desde el sur de Costa Rica, a través del norte de Suramérica hasta el sur de Brasil, Bolivia y Paraguay, se distinguen por tener diferencias en la coloración del plumaje a nivel de las alas, el dorso, la cola y la coronilla. El presente trabajo tiene como objetivo revisar la taxonomía de este complejo de especies a través de un análisis de caracteres de coloración, morfometría y vocalizaciones. Fueron estudiados 262 especímenes, 640 archivos sonoros y 80 fotografías, depositados en colecciones ornitológicas y repositorios virtuales en Brasil, Colombia y Estados Unidos. Fueron determinados 65 caracteres (17 de plumaje, 31 morfométricos y 17 de vocalizaciones) de los cuales 26 son informativos. El estudio taxonómico de los caracteres sugiere la existencia de cuatro taxones: (1) M. hellmayri Hartert y Goodson, 1917, que ocurre desde el sur de Costa Rica y en todo el territorio transandino hasta el noroccidente de Venezuela y el noreste de Ecuador, (2) M. erythropterus (Lafresnaye, 1853), que se encuentra al oriente de Brasil en los estados de Bahía, Minas Gerais, Espirito Santo y Rio de Janeiro, (3) M. c. rufipennis Lawrence, 1870, que se distribuye al noroccidente de Venezuela y en el Orinoco hasta el amazonas en Colombia y Ecuador, y (4) M. c. cayanensis (Linnaeus, 1766), que ocurre en todo el nororiente sudamericano en la franja amazónica, el escudo guyanés y la diagonal seca hasta el norte de Bolivia y Paraguay. Las similitudes entre los taxones aquí mencionados apuntan a un proceso de variación clinal morfológica y vocal, de manera que los taxones más lejanos entre sí difieren más que con respecto a sus vecinos cercanos en distribución geográfica. Es necesaria la inclusión de análisis moleculares en futuras revisiones, que permitan complementar y dilucidar con mayor claridad los procesos evolutivos actuales del complejo M. cayanensis.
Title in English
Taxonomic revision of a widely spread distributed neotropical species: the Myiozetetes cayanensis complex (Linnaeus, 1766) (Aves: Tyrannidae)
Keywords in English
Geographical distribution
Myiozetetes
Species limits.
Taxonomy
Abstract in English
The Myiozetetes cayanensis complex is currently composed by four subspecies: M. c. cayanensis, M. c. hellmayri, M. c. rufipennis and M. c. erythropterus. These taxa are distributed from south Costa Rica, through north South America to the south of Brazil, Bolivia and Paraguay, and they are distinguished by having differences in plumage coloration in wings, back, tail and crown. This work aims to review the taxonomy of this species complex through an analysis of coloration, morphometry and vocalizations. 262 specimens, 640 sound files and 80 photographs, deposited in ornithological collections and virtual repositories in Brazil, Colombia and the United States were studied. 65 characters were determined (17 plumage, 31 morphometric and 17 vocalizations) of which 26 were informative. The taxonomic study suggests the existence of four taxa: (1) M. hellmayri Hartert and Goodson, 1917, which occurs from south Costa Rica, throughout the trans-Andean area to northwest Venezuela and northeast Ecuador, (2) M. erythropterus (Lafresnaye, 1853), extant to east Brazil in the states of Bahia, Minas Gerais, Espirito Santo and Rio de Janeiro, (3) M. c. rufipennis Lawrence, 1870, which is distributed to northwest Venezuela in the Orinoco to the Amazonia in Colombia and Ecuador, and (4) M. c. cayanensis (Linnaeus, 1766), which occurs throughout northeastern South America in the Amazon fringe, the Guyanese shield, and the dry diagonal to northern Bolivia and Paraguay. The similarities between the taxa mentioned here point to a process of morphological and vocal clinal variation, so that the taxa that are more distant from each other differ more than with respect to their close neighbors in geographic distribution. The inclusion of molecular analyzes in future reviews is necessary to complement and clarify the current evolutionary processes of the M. cayanensis complex.
 
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Publishing Date
2021-05-26
 
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