Figure 19. Comparative plate of extant crocodylian and thalattosuchian internal rostral anatomy (A–G in dorsal view and H–I in lateral view). A, extant gavialid Gavialis gangeticus, referred specimen UF-herp-118998; B, non-neothalattosuchian Plagiophthalmosuchus gracilirostris, paratype NHMUK PV OR 15500; C, extant gavialid Tomistoma schlegelii, referred specimen USNM 211322; D, early diverging metriorhynchoid Pelagosaurus typus, referred specimen NHMUK PV OR 32599; E, extant crocodylid Crocodylus rhombifer, referred specimen MNB AB50.0171; F, H, rhacheosaurin metriorhynchid Cricosaurus araucanensis, holotype MLP 72-IV-7-1; G, I, geosaurin metriorhynchid Torvoneustes coryphaeus, holotype MJML K1863. All scale bars equal 5 cm. Highlighting how apneumatic thalattosuchian rostra were, that the preorbital fenestrae were decoupled from the paranasal sinus system, and how the enlarged salt glands expanded the posterior nasal cavity in metriorhynchoids. For details on the computed tomography scans and internal descriptions, see: Cowgill et al. 2023. Abbreviations: ant fen, antorbital fenestra; antorb, antorbital sinus of the paranasal sinus system; exp, expansion of the nasal cavity; max, maxillary diverticulum of the paranasal sinus system; max cec, maxillary cecal recess; nc, nasal cavity; pre fen, preorbital fenestra; post, postvestibular sinus.

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