Cranial anatomy and neuroanatomical features of a new specimen of Geosaurini (Crocodylomorpha: Metriorhynchidae) from west-central Argentina

Abstract

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Metriorhynchidae (Crocodylomorpha: Thalattosuchia) From Upper Jurassic–lower Cretaceous of Neuquén Basin (Argentina), With Comments on the Natural Casts of the Brain

“…4.3). The bone tissue preserved between the blood vessel fillings, suggested that the dural envelope of this region was thin and that the cerebral hemispheres filled most of the cavity (Herrera and Vennari, 2015). The infilling of the cranial nerves III, IV and VI were identified (Fig.…”

“…Comments. Based on the absent of diagnostic features, a more accurate determination could not be done (Herrera and Vennari, 2015). However, its description constituted the first detailed report of the brain endocast morphology and cranial nerves of a metriorhynchid.…”

“…paddle-like forelimbs, hypocercal tail, osteoporotic-like bone tissue, loss of osteoderms (e.g., Fraas, 1902; Andrews, 1913; Hua and Buffrénil, 1996;Young et al, 2010), and enlarged external carotid foramen and canal, enlarged and highly vascularised nasal salt gland, preorbital fenestra related with the drainage of salt gland, and reduced olfactory tract and bulbs Gasparini, 2000, 2008;Fernández and Herrera, 2009;Pol and Gasparini, 2009;Fernández et al, 2011;Herrera et al, 2013a;Herrera and Vennari, 2015). Metriorhynchidae is a Middle Jurassic to Early Cretaceous group that mainly lived in the Tethys and Pacific oceans.…”

Reptiles Extintos - Volumen en Homenaje a Zulma Gasparini

“…La comprensión de estos cambios permitirá delimitar las innovaciones evolutivas claves que le permitieron a los metriorrínquidos la conquista, sin paralelo entre los arcosaurios, del medio pelágico. Fernández, 2005, 2011 1913; Hua and Buffrénil, 1996;Young et al, 2010), and enlarged external carotid foramen and canal, enlarged and highly vascularised nasal salt gland, preorbital fenestra related with the drainage of salt gland, and reduced olfactory tract and bulbs Gasparini, 2000, 2008;Fernández and Herrera, 2009;Pol and Gasparini, 2009;Fernández et al, 2011;Herrera et al, 2013a;Herrera and Vennari, 2015). Metriorhynchidae is a Middle Jurassic to…”

“…D. andiniensis Comments. Based on the absent of diagnostic features, a more accurate determination could not be done (Herrera and Vennari, 2015). However, its description constituted the first detailed report of the brain endocast morphology and cranial nerves of a metriorhynchid.…”