Brain and pneumatic cavities of the braincase of the basal alligatoroid<i>Diplocynodon tormis</i>(Eocene, Spain)

Serrano-Martínez, Alejandro; Knoll, Fabien; Narváez, Iván

doi:10.1080/02724634.2019.1572612

Cited by 17 publications

(51 citation statements)

References 24 publications

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“…5; Serrano‐Martínez et al . 2019b). The morphology of the pharyngotympanic sinus of HUE‐03713 has been dramatically altered due to taphonomic compression.…”

Section: Discussionmentioning

confidence: 99%

“…Within Crocodylia, the alligatoroid sample includes the basal alligatoroid Diplocynodon tormis STUS‐344 (Serrano‐Martínez et al . 2019b), the alligatorine Alligator mississippiensis (our reconstruction based on MZB 92‐0231; OUVC‐9761, Witmer & Ridgely 2008; a list of another 13 specimens from Dufeau & Witmer 2015) and the caimanines Caiman crocodilus (our reconstruction based on caiman_crocodilus_CRARC; FMNH 73711, Brusatte et al . 2016) and Mourasuchus nativus (MLP 73‐IV‐15‐9, Bona et al .…”

Section: Methodsmentioning

confidence: 99%

“…Based on the ontogeny of Alligator mississippiensis (Dufeau & Witmer 2015), the sample was divided into two size‐based groups that share several features (Serrano‐Martínez et al . 2019b). Medium‐sized specimens, including Simosuchus clarki , Caiman crocodilus , Osteolaemus tetraspis and Diplocynodon tormis , have a skull length (from the caudal edge of the supraoccipital to the rostralmost tip of the premaxilla) between 100 and 300 mm.…”

Section: Methodsmentioning

confidence: 99%

“…2013) and Diplocynodon tormis (Serrano‐Martínez et al . 2019b) and the gavialoid Gryposuchus neogaeus (Bona et al . 2017).…”

mentioning

confidence: 99%

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Neuroanatomical and neurosensorial analysis of the Late Cretaceous basal eusuchian Agaresuchus fontisensis (Cuenca, Spain)

Serrano-Martínez

Knoll

Narváez

et al. 2020

Papers in Palaeontology

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Agaresuchus fontisensis is an allodaposuchid crocodile from the Campanian–Maastrichtian (Late Cretaceous) of Lo Hueco (Cuenca, Spain). Allodaposuchidae is a clade of European basal eusuchians, which is considered a part of the stem group of Crocodylia. The holotype and paratype skulls of Agaresuchus fontisensis were scanned on computed tomography and their internal cavities, including those of the brain, nerves and blood vessels, as well as the paratympanic sinus system and the paranasal sinuses, digitally reconstructed. The cranial endocast and pneumatic sinuses were then compared with those of other crocodyliforms. The neuroanatomy of Agaresuchus fontisensis resembles those of other mesoeucrocodylians, sharing some morphological traits with extant crocodiles. The neurosensorial and cognitive capabilities inferred from the inner skull cavity reconstructions of Agaresuchus fontisensis are similar to those of other eusuchians. The olfactory acuity of Agaresuchus fontisensis is low by crocodylian standards, closer to that of the alligatoroids rather than to that of the crocodyloids. Its visual acuity is similar to that of Lohuecosuchus megadontos, a sympatric allodaposuchid also found in the fossil site of Lo Hueco.

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“…5; Serrano‐Martínez et al . 2019b). The morphology of the pharyngotympanic sinus of HUE‐03713 has been dramatically altered due to taphonomic compression.…”

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

“…2013) and Diplocynodon tormis (Serrano‐Martínez et al . 2019b) and the gavialoid Gryposuchus neogaeus (Bona et al . 2017).…”

mentioning

confidence: 99%

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Neuroanatomical and neurosensorial analysis of the Late Cretaceous basal eusuchian Agaresuchus fontisensis (Cuenca, Spain)

Serrano-Martínez

Knoll

Narváez

et al. 2020

Papers in Palaeontology

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“…Thus, the cranioquadrate passage should not be considered and visualized as a part of the paratympanic pneumaticity, as it has been done in various recent studies (e.g. Bona et al, 2013Bona et al, , 2017Serrano-Martínez et al, 2019).…”

Section: General Features Of the Crocodylian Braincasementioning

confidence: 99%

Braincase anatomy of extant Crocodylia, with new insights into the development and evolution of the neurocranium in crocodylomorphs

et al. 2021

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Reevaluation of the cranial osteology and phylogenetic position of the early crocodyliform Eopneumatosuchus colberti, with an emphasis on its endocranial anatomy

Melstrom

Turner

Irmis

2021

The Anatomical Record

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Eopneumatosuchus colberti Crompton and Smith, 1980, known from a single partial skull, is an enigmatic crocodylomorph from the Lower Jurassic Kayenta Formation. In spite of its unique morphology, an exceptionally pneumatic braincase, and presence during a critical time period of crocodylomorph evolution, relatively little is known about this taxon. Here, we redescribe the external cranial morphology of E. colberti, present novel information on its endocranial anatomy, evaluate its phylogenetic position among early crocodylomorphs, and seek to better characterize its ecology. Our examination clarifies key aspects of cranial suture paths and braincase anatomy. Comparisons with related taxa (e.g., Protosuchus haughtoni) demonstrate that extreme pneumaticity of the braincase may be more widespread in protosuchids than previously appreciated. Computed tomography scans reveal an endocranial morphology that resembles that of other early crocodylomorphs, in particular the noncrocodyliform crocodylomorph Almadasuchus figarii. There are, however, key differences in olfactory bulb and cerebral hemisphere morphology, which demonstrate the endocranium of crocodylomorphs is not as conserved as previously hypothesized. Our phylogenetic analysis recovers E. colberti as a close relative of Protosuchus richardsoni and Edentosuchus tienshanensis, contrasting with previous hypotheses of a sister group relationship with Thalattosuchia. Previous work suggested the inner ear has some similarities to semi-aquatic crocodyliforms, but the phylogenetic placement of E. colberti among protosuchids with a terrestrial postcranial skeletal morphology complicates paleoecological interpretation.

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Brain and pneumatic cavities of the braincase of the basal alligatoroidDiplocynodon tormis(Eocene, Spain)

Cited by 17 publications

References 24 publications

Neuroanatomical and neurosensorial analysis of the Late Cretaceous basal eusuchian Agaresuchus fontisensis (Cuenca, Spain)

Neuroanatomical and neurosensorial analysis of the Late Cretaceous basal eusuchian Agaresuchus fontisensis (Cuenca, Spain)

Braincase anatomy of extant Crocodylia, with new insights into the development and evolution of the neurocranium in crocodylomorphs

Reevaluation of the cranial osteology and phylogenetic position of the early crocodyliform Eopneumatosuchus colberti, with an emphasis on its endocranial anatomy

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