Late Jurassic footprints reveal walking kinematics of theropod dinosaurs
Article first published online: 14 JUN 2011
© 2011 The Authors, Lethaia © 2011 The Lethaia Foundation
Volume 45, Issue 2, pages 238–252, April 2012
How to Cite
AVANZINI, M., PIÑUELA, L. and GARCÍA-RAMOS, J. C. (2012), Late Jurassic footprints reveal walking kinematics of theropod dinosaurs. Lethaia, 45: 238–252. doi: 10.1111/j.1502-3931.2011.00276.x
- Issue published online: 13 MAR 2012
- Article first published online: 14 JUN 2011
Avanzini, M., Piñuela, L. & García-Ramos, J.C. 2011: Late Jurassic footprints reveal walking kinematics of theropod dinosaurs. Lethaia, Vol. 45, pp. 238–252.
This study describes a set of theropod footprints collected from the Late Jurassic Lastres Formation (Asturias, N Spain). The footprints are natural casts (tracks and undertracks) grouped into three morphotypes, which are characterized by different size frequency, L/W relationship and divarication angles: ‘Grallatorid’ morphotype, ‘Kayentapus–Magnoavipes’ morphotype, ‘Hispanosauropus’ morphotype. The tracks were produced in firm, stiff and soft sediments. The infills of deep tracks, which are typically formed in soft mud, lack fine anatomical details, but they can reveal the walk kinematics of the trackmaker through the morphology of internal track fills and sinking traces. In all footprints, a horizontal outwardly directed translation movement and rotation are recognizable. The amount and geometry of digit penetration in the ground also show a pronounced difference. It can be inferred from the described sample that different theropoda-related ichnogenera share common kinematics. □Asturias, dinosaur footprint, late jurassic, theropods, walking kinematics.