Figure 24. Comparative plate of thalattosuchian pelvic girdles and hindlimbs. A, the teleosaurid teleosauroid Platysuchus multiscrobiculatus, holotype SMNS 9930; B, the machimosaurid teleosauroid Macrospondylus bollensis, referred specimen NMW 13445; C, the early diverging metriorhynchoid Pelagosaurus typus, referred specimen FWD 0784; D, the metriorhynchid Cricosaurus albersdoerferi, holotype BMMS-BK 1-2. All scale bars equal 10 cm. Highlighting the changes as thalattosuchians became increasingly aquatic, such as the loss of osteoderms, proportional reduction of the ilium and tibiae, strongly ventrally curved sacral ribs, and modification of the pes into a paddle.

Published as part of Young, Mark T., Wilberg, Eric W., Johnson, Michela M., Herrera, Yanina, Brandalise, Marco de Andrade, Brignon, Arnaud, Sachs, Sven, Abel, Pascal, Foffa, Davide, Fernández, Marta S., Vignaud, Patrick, Cowgill, Thomas & Brusatte, Stephen L., 2024, The history, systematics, and nomenclature of Thalattosuchia (Archosauria: Crocodylomorpha), pp. 547-617 in Zoological Journal of the Linnean Society 200 (2) on page 602, DOI: 10.1093/zoolinnean/zlad165, http://zenodo.org/record/11241243