Figure 1. Comparing the body plans of semi-aquatic thalattosuchians (A–C) with that of a fully aquatic metriorhynchid (D). 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 suevicus, lectotype SMNS 9808. All scale bars equal 20 cm. Even amongst the semi-aquatic thalattosuchians there is variation, such as the greater size and coverage of osteoderms in Platysuchus, with Pelagosaurus having the most reduced armour of the three.

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 548, DOI: 10.1093/zoolinnean/zlad165, http://zenodo.org/record/11241243