The ontogenetic osteohistology of Tenontosaurus tilletti.

Tenontosaurus tilletti is an ornithopod dinosaur known from the Early Cretaceous (Aptian-Albian) Cloverly and Antlers formations of the Western United States. It is represented by a large number of specimens spanning a number of ontogenetic stages, and these specimens have been collected across a wi...

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Autor principal:	Sarah Werning
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2012
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/259f860d39e84e369d328ed28d281394
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spelling	oai:doaj.org-article:259f860d39e84e369d328ed28d2813942021-11-18T07:24:05ZThe ontogenetic osteohistology of Tenontosaurus tilletti.1932-620310.1371/journal.pone.0033539https://doaj.org/article/259f860d39e84e369d328ed28d2813942012-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/22470454/?tool=EBIhttps://doaj.org/toc/1932-6203Tenontosaurus tilletti is an ornithopod dinosaur known from the Early Cretaceous (Aptian-Albian) Cloverly and Antlers formations of the Western United States. It is represented by a large number of specimens spanning a number of ontogenetic stages, and these specimens have been collected across a wide geographic range (from central Montana to southern Oklahoma). Here I describe the long bone histology of T. tilletti and discuss histological variation at the individual, ontogenetic and geographic levels. The ontogenetic pattern of bone histology in T. tilletti is similar to that of other dinosaurs, reflecting extremely rapid growth early in life, and sustained rapid growth through sub-adult ontogeny. But unlike other iguanodontians, this dinosaur shows an extended multi-year period of slow growth as skeletal maturity approached. Evidence of termination of growth (e.g., an external fundamental system) is observed in only the largest individuals, although other histological signals in only slightly smaller specimens suggest a substantial slowing of growth later in life. Histological differences in the amount of remodeling and the number of lines of arrested growth varied among elements within individuals, but bone histology was conservative across sampled individuals of the species, despite known paleoenvironmental differences between the Antlers and Cloverly formations. The bone histology of T. tilletti indicates a much slower growth trajectory than observed for other iguanodontians (e.g., hadrosaurids), suggesting that those taxa reached much larger sizes than Tenontosaurus in a shorter time.Sarah WerningPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 7, Iss 3, p e33539 (2012)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Sarah Werning The ontogenetic osteohistology of Tenontosaurus tilletti.
description	Tenontosaurus tilletti is an ornithopod dinosaur known from the Early Cretaceous (Aptian-Albian) Cloverly and Antlers formations of the Western United States. It is represented by a large number of specimens spanning a number of ontogenetic stages, and these specimens have been collected across a wide geographic range (from central Montana to southern Oklahoma). Here I describe the long bone histology of T. tilletti and discuss histological variation at the individual, ontogenetic and geographic levels. The ontogenetic pattern of bone histology in T. tilletti is similar to that of other dinosaurs, reflecting extremely rapid growth early in life, and sustained rapid growth through sub-adult ontogeny. But unlike other iguanodontians, this dinosaur shows an extended multi-year period of slow growth as skeletal maturity approached. Evidence of termination of growth (e.g., an external fundamental system) is observed in only the largest individuals, although other histological signals in only slightly smaller specimens suggest a substantial slowing of growth later in life. Histological differences in the amount of remodeling and the number of lines of arrested growth varied among elements within individuals, but bone histology was conservative across sampled individuals of the species, despite known paleoenvironmental differences between the Antlers and Cloverly formations. The bone histology of T. tilletti indicates a much slower growth trajectory than observed for other iguanodontians (e.g., hadrosaurids), suggesting that those taxa reached much larger sizes than Tenontosaurus in a shorter time.
format	article
author	Sarah Werning
author_facet	Sarah Werning
author_sort	Sarah Werning
title	The ontogenetic osteohistology of Tenontosaurus tilletti.
title_short	The ontogenetic osteohistology of Tenontosaurus tilletti.
title_full	The ontogenetic osteohistology of Tenontosaurus tilletti.
title_fullStr	The ontogenetic osteohistology of Tenontosaurus tilletti.
title_full_unstemmed	The ontogenetic osteohistology of Tenontosaurus tilletti.
title_sort	ontogenetic osteohistology of tenontosaurus tilletti.
publisher	Public Library of Science (PLoS)
publishDate	2012
url	https://doaj.org/article/259f860d39e84e369d328ed28d281394
work_keys_str_mv	AT sarahwerning theontogeneticosteohistologyoftenontosaurustilletti AT sarahwerning ontogeneticosteohistologyoftenontosaurustilletti
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The ontogenetic osteohistology of Tenontosaurus tilletti.

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