First approach to the paleohistology of the hadrosaur dinosaurs from Blasi 2A (Tremp Formation, Maastrichtian, Huesca)
Authors
A. Mayayo-Lainez
Grupo Aragosaurus-IUCA Departamento de Ciencias de la Tierra, Facultad de Ciencias, Universidad de Zaragoza. Pedro Cerbuna 12, 5009 Zaragoza, Spain
M. Alegre-Esteve
Grupo Aragosaurus-IUCA Departamento de Ciencias de la Tierra, Facultad de Ciencias, Universidad de Zaragoza. Pedro Cerbuna 12, 5009 Zaragoza, Spain
B. Bauluz
Grupo Aragosaurus-IUCA Departamento de Ciencias de la Tierra, Facultad de Ciencias, Universidad de Zaragoza. Pedro Cerbuna 12, 5009 Zaragoza, Spain
J. I. Canudo
Grupo Aragosaurus-IUCA Departamento de Ciencias de la Tierra, Facultad de Ciencias, Universidad de Zaragoza. Pedro Cerbuna 12, 5009 Zaragoza, Spain
In this work, a paleohistological approach of hadrosaurid dinosaur bones of Blasi 2A site in Arén (Huesca) is carried out. This site is located in the Tremp Formation and was formed in transitional facies. The grey marl of the site contains disarticulated dinosaur bones and a diverse microfossil assemblage. Some of the microfossils found indicate that the site was formed underwater, although no direct evidence of marine influence has been found.
In order to study the histology of the hadrosaurids by means of optical microscopy, six bone remains have been selected: two ribs, two femurs and two vertebrae. The histologic characteristics will determine the ontogenetic stage of the remains at the moment of the death. The data indicate that three of the individuals were adult, two were subadult specimens, and only one was a juvenile individual.
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