Abstract
Comparative bone microstructure of three archosauromorphs from the Carnian, Late Triassic Chañares Formation of Argentina
Highlights
Bone microstructure of Lagerpeton chanarensis and Tropidosuchus romeri is dominated by fibro-lamellar tissue and dense vascularization
Dense vascularization and fibro-lamellar tissue imply fast growth and high metabolic rates for all these taxa. These histological traits may be tentatively interpreted as a possible adaptative advantage in front of Chañares Formation environmental conditions
Agnolín [fedeagnolin@yahoo.com.ar], Laboratorio de Anatomía Comparada y Evolución de los Vertebrados, Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”, 470 Ángel Gallardo, 1405DJR, Buenos Aires, Argentina; Área de Paleontología, Fundación de Historia Natural “Félix de Azara”, Departamente de Ciencias Naturales y Antropología, Universidad Maimónides, 775 Hidalgo piso 7, 1405BDB, Buenos Aires, Argentina
Summary
The Chañares Formation exhibits one of the most important archosauriform records of early Carnian ecosystems. We present new data on the palaeohistology of Chañares archosauriforms and provide new insights into their paleobiology, as well as possible phylogenetically informative traits.
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