Plagiophthalmosuchus gracilirostris, (Westphal, 1961), (Westphal)

publication ID	https://doi.org/ 10.5252/geodiversitas2024v46a6
publication LSID	urn:lsid:zoobank.org:pub:6ACF6A79-9149-4781-808D-478668673EB6
DOI	https://doi.org/10.5281/zenodo.11106004
persistent identifier	https://treatment.plazi.org/id/038A5676-1D74-FFBF-FF26-94B0FA6A5481
treatment provided by	Plazi
scientific name	Plagiophthalmosuchus gracilirostris
status

For measurements, see Tables 7-9 View TABLE View TABLE View TABLE .

Ilium

The ilium of Plagiophthalmosuchus gracilirostris ( Westphal, 1961) ( Fig. 36 View FIG ) bears the typical postacetabular process of teleosauroids contrasting with the metriorhynchoids iliac morphology (e.g.‘ Metriorhynchus ’ brachyrhynchus NHMUK PV R 4763, Thalattosuchus superciliosus , Geosaurus giganteus , etc.). The ilium of Plagiophthalmosuchus gracilirostris is not complete, but appears to possess a rather slender postacetabular process, in the way of Platysuchus multiscrobiculatus . Indeed, the junction between the ventral margin of the postacetabular process and the posterior margin of the ilium seems to form an angle closer to 90° than to an obtuse angle like seen in other teleosauroids (e.g. Lemmysuchus obtusidens , Charitomenosuchus leedsi , Neosteneosaurus edwardsi , etc.). The exact shape of the extremity of the postacetabular process of Plagiophthalmosuchus gracilirostris is unclear, but was presumably elliptic as in other teleosauroids.

The dorsal margin of the ilium of Plagiophthalmosuchus gracilirostris , which corresponds to the iliac crest, appears to have been relatively straight or slightly convex as in Lemmysuchus obtusidens , Charitomenosuchus leedsi , and Neosteneosaurus edwardsi . The junction between the iliac crest and the base of the preacetabular process is partially broken but was potentially slightly concave as in other teleosauroids. Likewise, the preacetabular process of Plagiophthalmosuchus gracilirostris is not preserved but presumably presented the shape of a hook. The surface underneath the base of the preacetabular process, corresponding to the anterior margin of the ilium, is straight as in Lemmysuchus obtusidens , Platysuchus multiscrobiculatus and Neosteneosaurus edwardsi contra Charitomenosuchus leedsi .