Teeth complexity, hypsodonty and body mass in Santacrucian (Early Miocene) notoungulates (Mammalia)

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Notoungulates, native South American fossil mammals, have been recently objective of several palaeoecological studies. Ecomorphology and biomechanics of the masticatory apparatus, together with micro and mesowear analyses on tooth enamel, were applied in order to understand their palaeobiology. In p...

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Autores principales: Cassini, Guillermo Hernán, Hernández Del Pino, Santiago, Muñoz, Nahuel Antu, Acosta, M. V. Walter G, Fernández, Mercedes, Bargo, María Susana, Vizcaíno, Sergio Fabián
Formato: Articulo
Lenguaje:Español
Publicado: 2017
Materias:
Paleontología
Mamíferos
Tafonomía
Estratigrafía
Holoceno
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/74910
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-74910
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Español
topic Paleontología
Mamíferos
Tafonomía
Estratigrafía
Holoceno
spellingShingle Paleontología
Mamíferos
Tafonomía
Estratigrafía
Holoceno
Cassini, Guillermo Hernán
Hernández Del Pino, Santiago
Muñoz, Nahuel Antu
Acosta, M. V. Walter G
Fernández, Mercedes
Bargo, María Susana
Vizcaíno, Sergio Fabián
Teeth complexity, hypsodonty and body mass in Santacrucian (Early Miocene) notoungulates (Mammalia)
topic_facet Paleontología
Mamíferos
Tafonomía
Estratigrafía
Holoceno
description Notoungulates, native South American fossil mammals, have been recently objective of several palaeoecological studies. Ecomorphology and biomechanics of the masticatory apparatus, together with micro and mesowear analyses on tooth enamel, were applied in order to understand their palaeobiology. In particular, the relationship between some dental traits (hypsodonty, occlusal surface area and complexity) and body mass is still poorly understood. These features were measured by means of the hypsodonty index (HI), occlusal surface area (OSA) and tooth area (OTA), enamel crest complexity (ECC) and length (OEL). The relationships between these indices were evaluated in five pan-contemporaneous Santacrucian Notoungulata genera from Patagonia: Adinotherium and<em>Nesodon</em> (Toxodontia), <em>Interatherium</em>, <em>Protypotherium</em> and <em>Hegetotherium</em> (Typotheria). While OSA, OTA and OEL were size dependent and strongly correlated, HI and ECC were size independent. All notoungulates analysed have very hypsodont teeth, indicating high rates of tooth wear in response to an increase of abrasives consumed with the food; their tooth occlusal area and complexity could be related to chewing efforts associated with the toughness of the plants consumed. HI, OSA and ECC were considered useful for paleoecological reconstructions, but the results presented here show that these three features are integrated as a complex, so should not be evaluated separately.
format Articulo
Articulo
author Cassini, Guillermo Hernán
Hernández Del Pino, Santiago
Muñoz, Nahuel Antu
Acosta, M. V. Walter G
Fernández, Mercedes
Bargo, María Susana
Vizcaíno, Sergio Fabián
author_facet Cassini, Guillermo Hernán
Hernández Del Pino, Santiago
Muñoz, Nahuel Antu
Acosta, M. V. Walter G
Fernández, Mercedes
Bargo, María Susana
Vizcaíno, Sergio Fabián
author_sort Cassini, Guillermo Hernán
title Teeth complexity, hypsodonty and body mass in Santacrucian (Early Miocene) notoungulates (Mammalia)
title_short Teeth complexity, hypsodonty and body mass in Santacrucian (Early Miocene) notoungulates (Mammalia)
title_full Teeth complexity, hypsodonty and body mass in Santacrucian (Early Miocene) notoungulates (Mammalia)
title_fullStr Teeth complexity, hypsodonty and body mass in Santacrucian (Early Miocene) notoungulates (Mammalia)
title_full_unstemmed Teeth complexity, hypsodonty and body mass in Santacrucian (Early Miocene) notoungulates (Mammalia)
title_sort teeth complexity, hypsodonty and body mass in santacrucian (early miocene) notoungulates (mammalia)
publishDate 2017
url http://sedici.unlp.edu.ar/handle/10915/74910
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