ammonites
Brontopodus birdi Farlow et al. 1989

Archosauria - Dinosauria

Alternative combination: Brontopodus birdii

Full reference: J. O. Farlow, J. G. Pittman, and J. M. Hawthorne. 1989. Brontopodus birdi, Lower Cretaceous dinosaur footprints from the U.S. Gulf Coastal Plain. Dinosaur Tracks and Traces. Cambridge University Press, Cambridge 371-394

Belongs to Brontopodus according to B. J. González Riga and J. O. Calvo 2007

Sister taxon: Brontopodus changlingensis

Type specimen: AMNH 3065 & TMM 40638-1. Its type locality is TMM 40638, Paluxy River #A3 (Bird Site), which is in an Albian lagoonal lime mudstone/mudstone in the Glen Rose Formation of Texas.