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Sauropod trackways from Spain show gauge variation

From: Ben Creisler

A new online article:

Castanera, D., Pascual, C., Canudo, J.I., Hernández, N. & Barco, J.L. (2012)
Ethological variations in gauge in sauropod trackways from the
Berriasian of Spain.
Lethaia (advance online publication)
doi: 10.1111/j.1502-3931.2012.00304.x

Two sauropod trackways from the Early Cretaceous (Berriasian) of the
Cameros Basin (Spain) show important variations in trackway gauge,
along the same trackway. These variations seem to be associated with
different behaviours; on the one hand with a significant variation in
the direction of travel (turning phenomena) and on the other hand with
a decrease in speed, probably associated with the properties of the
substrate. These variations in sauropod trackways provide the trackway
gauge debate with new data, supporting the hypothesis that the walking
style and substrate properties may in some cases determine this
sauropod character. The study of turning sauropod trackways improves
our knowledge of sauropod locomotion.