Morphology of the Middle Ear in Three Species of Armadillos (Dasypodidae, Xenarthra) from Argentina

Middle ears of adult Chaetophractus villosus, C. vellerosus and Zaedyus pichiy were studied for qualitative and quantitative comparisons. A great similarity in the overall shape of the middle ear structures was observed in the three species. The well-developed auditory bulla was formed by the intima...

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Autores principales:	Sidorkewicj,Nora S, Casanave,Emma B
Lenguaje:	English
Publicado:	Sociedad Chilena de Anatomía 2012
Materias:	Chaetophractus villosus Chaetophractus vellerosus Zaedyus pichiy Fossorial Middle ear
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022012000400038
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id	oai:scielo:S0717-95022012000400038
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spelling	oai:scielo:S0717-950220120004000382013-06-20Morphology of the Middle Ear in Three Species of Armadillos (Dasypodidae, Xenarthra) from ArgentinaSidorkewicj,Nora SCasanave,Emma B Chaetophractus villosus Chaetophractus vellerosus Zaedyus pichiy Fossorial Middle ear Middle ears of adult Chaetophractus villosus, C. vellerosus and Zaedyus pichiy were studied for qualitative and quantitative comparisons. A great similarity in the overall shape of the middle ear structures was observed in the three species. The well-developed auditory bulla was formed by the intimate fusion of the tympanic and entotympanic. Internally, a recessus meatus and a wide epitympanic recess extending dorsally into an epitympanic sinus were recognized. The petrosal promontorium, nearly triangular, was the most salient feature in the tympanic cavity. The auditory ossicles corresponded to the transitional middle ear type. The m. tensor tympani and the m. stapedius were conspicuous. The lack of a stapedial artery was confirmed in all cases. The tympanic area and middle ear ossicles were relatively larger in C. vellerosus than in the other two species. It is hoped that the results of the present paper coupled to the bullar hypertrophy found in a previous work will provide a significant basis for future functional studies on the hearing capabilities in the dasypodids.info:eu-repo/semantics/openAccessSociedad Chilena de AnatomíaInternational Journal of Morphology v.30 n.4 20122012-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022012000400038en10.4067/S0717-95022012000400038
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Chaetophractus villosus Chaetophractus vellerosus Zaedyus pichiy Fossorial Middle ear
spellingShingle	Chaetophractus villosus Chaetophractus vellerosus Zaedyus pichiy Fossorial Middle ear Sidorkewicj,Nora S Casanave,Emma B Morphology of the Middle Ear in Three Species of Armadillos (Dasypodidae, Xenarthra) from Argentina
description	Middle ears of adult Chaetophractus villosus, C. vellerosus and Zaedyus pichiy were studied for qualitative and quantitative comparisons. A great similarity in the overall shape of the middle ear structures was observed in the three species. The well-developed auditory bulla was formed by the intimate fusion of the tympanic and entotympanic. Internally, a recessus meatus and a wide epitympanic recess extending dorsally into an epitympanic sinus were recognized. The petrosal promontorium, nearly triangular, was the most salient feature in the tympanic cavity. The auditory ossicles corresponded to the transitional middle ear type. The m. tensor tympani and the m. stapedius were conspicuous. The lack of a stapedial artery was confirmed in all cases. The tympanic area and middle ear ossicles were relatively larger in C. vellerosus than in the other two species. It is hoped that the results of the present paper coupled to the bullar hypertrophy found in a previous work will provide a significant basis for future functional studies on the hearing capabilities in the dasypodids.
author	Sidorkewicj,Nora S Casanave,Emma B
author_facet	Sidorkewicj,Nora S Casanave,Emma B
author_sort	Sidorkewicj,Nora S
title	Morphology of the Middle Ear in Three Species of Armadillos (Dasypodidae, Xenarthra) from Argentina
title_short	Morphology of the Middle Ear in Three Species of Armadillos (Dasypodidae, Xenarthra) from Argentina
title_full	Morphology of the Middle Ear in Three Species of Armadillos (Dasypodidae, Xenarthra) from Argentina
title_fullStr	Morphology of the Middle Ear in Three Species of Armadillos (Dasypodidae, Xenarthra) from Argentina
title_full_unstemmed	Morphology of the Middle Ear in Three Species of Armadillos (Dasypodidae, Xenarthra) from Argentina
title_sort	morphology of the middle ear in three species of armadillos (dasypodidae, xenarthra) from argentina
publisher	Sociedad Chilena de Anatomía
publishDate	2012
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022012000400038
work_keys_str_mv	AT sidorkewicjnoras morphologyofthemiddleearinthreespeciesofarmadillosdasypodidaexenarthrafromargentina AT casanaveemmab morphologyofthemiddleearinthreespeciesofarmadillosdasypodidaexenarthrafromargentina
_version_	1718444805649858560

Morphology of the Middle Ear in Three Species of Armadillos (Dasypodidae, Xenarthra) from Argentina

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