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Biotemas
Article . 2015
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Principle features of the cranial osteology of Milvago chimango (Vieillot, 1816) and Milvago chimachima (Vieillot, 1816) (Aves: Falconidae)

Authors: Guzzi, Anderson; Santos, Antonia Marques dos; Santos, Juliana Dias dos; Donatelli, Reginaldo José; Ferreira, Guilherme José Bolzani de Campos;

Principle features of the cranial osteology of Milvago chimango (Vieillot, 1816) and Milvago chimachima (Vieillot, 1816) (Aves: Falconidae)

Abstract

Knowledge of details of the cranial osteology of Milvago chimango and M. chimachima helps to ensure the monophyly of genus when compared to other birds and falcons. We conducted a study using skulls of three Milvago chimango and three Milvago chimachima specimens from the Smithsonian Institution National Museum of Natural History's Division of Birds. The cranial descriptions were comparative and illustrated by photos from the dorsal, ventral, and lateral flow perspectives. The studied species were then compared with falcons and other birds. Milvago chimango possesses several unique characters, including: the ratio of the distance from the distal portion of the lacrimal bone to the orbital arc, and from the orbital arc to the buccal arc is (1/5); absence of transpalate processes; lack of dorsal process on the pterygoid bone; more robust skull; paraoccipital bone more developed laterally; lacrimal bone smaller and more rostral; palatine bone approximately twice as wide; ethmoide bone more robust and long. In M. chimachima, the distinguishing features are: presence of projections at the caudal end of the palatine bone; developed dorsal process of the pterygoid bone; temporal fossa more tapered dorsoventrally; transverse nuchal crest outlined and visible; nostril closer to the frontonasal suture. Cranial osteology successfully provided diagnostic characters of each species and gender compared to other birds and falcons. to the installation of large enterprises or environmental protection areas. alic'>seedlings.

O detalhamento da osteologia craniana de Milvago chimango e M. chimachima, contribui para assegurar a monofilia do gênero quando comparado a outras aves e a outros falconídeos. O estudo foi realizado com os crânios de três espécimes de Milvago chimango e três de Milvago chimachima, pertencentes a Divisão de Aves do Museu de História Natural Smithsonian Institution. A descrição craniana foi comparativa e ilustrada por fotos nas vistas: dorsal, ventral, caudal e lateral; sendo as espécies estudas comparados com Falconideos e algumas outras aves. Os caracteres exclusivos de M. chimango são: razão entre a distância da porção distal do osso lacrimal ao arco da órbita e deste até a arco jugal é de 1/5; ausência dos processos transpalatinos; ausência do processo dorsal do osso pterigoide; crânio mais robusto; osso paraoccipital mais desenvolvido laterolateralmente; osso lacrimal menor e mais rostral; osso palatino aproximadamente duas vezes mais largo; osso ectetmoide mais robusto e longo. Em M. chimachima são: presença de projeções na extremidade caudal do osso palatino; desenvolvido processo dorsal do osso pterigoide; fossa temporal mais afilada dorsoventralmente; crista nucal transversa delineada e visível; narina mais próxima à sutura frontonasal. A osteologia craniana forneceu caracteres diagnósticos de cada uma das espécies e do gênero, quando comparados a outras aves e aos falconídeos.

Keywords

Morphology, QH301-705.5, Science, Skull, Q, Anatomy, Biology (General)

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
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