[Rockhounds] Amniote tetrapods documented in two Pennsylvanian Grand Canyon trackways

[Paul]

Discovered fossil tracks determined to be
oldest known in Grand Canyon National Park
ABC, Channel 15 News, Arizona
https://www.abc15.com/news/region-northern-az/discovered-fossil-tracks-determined-to-be-oldest-known-in-grand-canyon-national-park

The open access paper is:

Rowland, S.M., Caputo, M.V., and Jensen, Z.A.,
2020. Early adaptation to eolian sand dunes by
basal amniotes is documented in two Pennsylvanian
Grand Canyon trackways. PLoS ONE 15(8): e0237636.
https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0237636

A related paper is:

Francischini, H., Lucas, S.G., Voigt, S., Marchetti,
L., Santucci, V.L., Knight, C.L., Wood, J.R.,
Dentzien-Dias, P. and Schultz, C.L., 2020. On the
presence of Ichniotherium in the Coconino
Sandstone (Cisuralian) of the Grand Canyon and
remarks on the occupation of deserts by
non-amniote tetrapods. PalZ, 94(1), pp.207-225.
https://link.springer.com/article/10.1007/s12542-019-00450-5

Yours,

Paul H.