Internal Morphology of Osteoderms of Extinct Armadillos and Its Relationship with Environmental Conditions

The most complete and continuous fossil record of armadillos is composed mostly by isolated osteoderms, frequently found in paleontological and archaeological sites that bear continental South American mammals. Their external morphology has been used to define several species. In the last decade, ma...

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Detalles Bibliográficos
Autores principales: Ciancio, Martín Ricardo, Krmpotic, Cecilia Mariana, Scarano, Alejo Carlos, Epele, M. B.
Formato: Articulo
Lenguaje:Inglés
Publicado: 2019
Materias:
Ciencias Naturales
Dasypodidae
paleohistology
dermal ossifications
Early Cenozoic
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/106942
https://link.springer.com/article/10.1007/s10914-017-9404-y
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-106942
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
Dasypodidae
paleohistology
dermal ossifications
Early Cenozoic
spellingShingle Ciencias Naturales
Dasypodidae
paleohistology
dermal ossifications
Early Cenozoic
Ciancio, Martín Ricardo
Krmpotic, Cecilia Mariana
Scarano, Alejo Carlos
Epele, M. B.
Internal Morphology of Osteoderms of Extinct Armadillos and Its Relationship with Environmental Conditions
topic_facet Ciencias Naturales
Dasypodidae
paleohistology
dermal ossifications
Early Cenozoic
description The most complete and continuous fossil record of armadillos is composed mostly by isolated osteoderms, frequently found in paleontological and archaeological sites that bear continental South American mammals. Their external morphology has been used to define several species. In the last decade, many authors have focused on the internal structure of vertebrate osteoderms using histological and paleohistological studies. These studies allowed identification of useful features in systematic and phylogenetic contexts. In armadillos, osteoderms are constituted by compact bone tissue (primary and secondary osteons, and concentric layers or lamellae) that delimits cavities, which could contain different soft tissues (adipose tissue, hair follicles, bone marrow, and sweat and sebaceous glands). Traditional paleohistological techniques have allowed the recognition of homologous cavities to those found in osteoderms of current species and from comparison deduce which kind of tissue could had occupied them.We have recently utilized 3D reconstructions in osteoderms of extant species of armadillos to analyze the micromorphology, disposition, and the relationship of different cavities and understand them in depth. Here, we present the results of the application of paleohistology and microtomography in osteoderms of representatives of diferent taxa of extinct Dasypodidae (Astegotheriini, Stegotheriini, "Utaetini", Euphractini, Eutatini), which allowed us to compare homologous structures based on their three-dimensional reconstruction. The results, added to the previous external morphology studies, have allowed us to define morphological patterns (consistent within each linage). The variation of the volume and extension of cavities associated with different tissues could be strongly associated with changes in the climate and environmental conditions of the species distribution areas.
format Articulo
Articulo
author Ciancio, Martín Ricardo
Krmpotic, Cecilia Mariana
Scarano, Alejo Carlos
Epele, M. B.
author_facet Ciancio, Martín Ricardo
Krmpotic, Cecilia Mariana
Scarano, Alejo Carlos
Epele, M. B.
author_sort Ciancio, Martín Ricardo
title Internal Morphology of Osteoderms of Extinct Armadillos and Its Relationship with Environmental Conditions
title_short Internal Morphology of Osteoderms of Extinct Armadillos and Its Relationship with Environmental Conditions
title_full Internal Morphology of Osteoderms of Extinct Armadillos and Its Relationship with Environmental Conditions
title_fullStr Internal Morphology of Osteoderms of Extinct Armadillos and Its Relationship with Environmental Conditions
title_full_unstemmed Internal Morphology of Osteoderms of Extinct Armadillos and Its Relationship with Environmental Conditions
title_sort internal morphology of osteoderms of extinct armadillos and its relationship with environmental conditions
publishDate 2019
url http://sedici.unlp.edu.ar/handle/10915/106942
https://link.springer.com/article/10.1007/s10914-017-9404-y
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