Ulnar articular surface 3-D landmarks and ecomorphology of small mammals: a case study of two early Miocene typotheres (Notoungulata) from Patagonia

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Articular surfaces reflect the relative movements between adjacent bones, and the ones involved in the elbow joint provide information about forelimb movements and may be useful for making inferences about the substrate use. The proximal articular surface of the ulna was examined through 3-D geometr...

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Autores principales:	Muñoz, Nahuel Antu, Cassini, Guillermo Hernán, Candela, Adriana Magdalena, Vizcaíno, Sergio Fabián
Formato:	Articulo
Lenguaje:	Inglés
Publicado:	2017
Materias:	Ciencias Naturales Functional morphology geometric morphometrics palaeobiology substrate use
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/87627
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-87627
record_format	dspace
institution	Universidad Nacional de La Plata
institution_str	I-19
repository_str	R-120
collection	SEDICI (UNLP)
language	Inglés
topic	Ciencias Naturales Functional morphology geometric morphometrics palaeobiology substrate use
spellingShingle	Ciencias Naturales Functional morphology geometric morphometrics palaeobiology substrate use Muñoz, Nahuel Antu Cassini, Guillermo Hernán Candela, Adriana Magdalena Vizcaíno, Sergio Fabián Ulnar articular surface 3-D landmarks and ecomorphology of small mammals: a case study of two early Miocene typotheres (Notoungulata) from Patagonia
topic_facet	Ciencias Naturales Functional morphology geometric morphometrics palaeobiology substrate use
description	Articular surfaces reflect the relative movements between adjacent bones, and the ones involved in the elbow joint provide information about forelimb movements and may be useful for making inferences about the substrate use. The proximal articular surface of the ulna was examined through 3-D geometric morphometrics, in order to assess its usefulness as a proxy for paleoecological interpretations; particularly for two small mammals from the early Miocene of Patagonia. The sample was composed of 22 extant small mammals (rodents, carnivorans and primates) and two extinct typotheres: <i>Hegetotherium mirabile</i> (Hegetotheriidae) and <i>Interatherium robustum</i> (Interatheriidae). Forty-five landmarks were taken and principal component analysis (PCA) was used to explore the morphospace structure. The results of PCA for the whole surface were inconclusive; therefore, successive analyses were made, subdividing the surface into sub-units. The PCA for the proximal part of the trochlear notch was the most informative, allowing the recognition of morphospaces with functional value: one for digging rodents and another for most climbers. Neither typothere would have had a specialisation for climbing or digging in the features analysed. This study allows morphological patterns on different parts of a joint to be detected; interpreted, at least partially, as differential responses to different kinds of mechanical stress.
format	Articulo Articulo
author	Muñoz, Nahuel Antu Cassini, Guillermo Hernán Candela, Adriana Magdalena Vizcaíno, Sergio Fabián
author_facet	Muñoz, Nahuel Antu Cassini, Guillermo Hernán Candela, Adriana Magdalena Vizcaíno, Sergio Fabián
author_sort	Muñoz, Nahuel Antu
title	Ulnar articular surface 3-D landmarks and ecomorphology of small mammals: a case study of two early Miocene typotheres (Notoungulata) from Patagonia
title_short	Ulnar articular surface 3-D landmarks and ecomorphology of small mammals: a case study of two early Miocene typotheres (Notoungulata) from Patagonia
title_full	Ulnar articular surface 3-D landmarks and ecomorphology of small mammals: a case study of two early Miocene typotheres (Notoungulata) from Patagonia
title_fullStr	Ulnar articular surface 3-D landmarks and ecomorphology of small mammals: a case study of two early Miocene typotheres (Notoungulata) from Patagonia
title_full_unstemmed	Ulnar articular surface 3-D landmarks and ecomorphology of small mammals: a case study of two early Miocene typotheres (Notoungulata) from Patagonia
title_sort	ulnar articular surface 3-d landmarks and ecomorphology of small mammals: a case study of two early miocene typotheres (notoungulata) from patagonia
publishDate	2017
url	http://sedici.unlp.edu.ar/handle/10915/87627
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bdutipo_str	Repositorios
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Ulnar articular surface 3-D landmarks and ecomorphology of small mammals: a case study of two early Miocene typotheres (Notoungulata) from Patagonia

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