Description of ichthyosaur remains from the Lower Cretaceous Agrio Formation (Neuquén Basin, west-central Argentina) and their paleobiological implications

Lazo, Darío G.; Talevi, Marianella; Cataldo, Cecilia S.; Aguirre–Urreta, Beatriz; Fernández, Marta

doi:10.1016/j.cretres.2018.02.019

Cited by 12 publications

(3 citation statements)

References 51 publications

(51 reference statements)

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“…Well-known for their thunniform body shape and viviparous reproductive strategy [ 3 , 4 ], they were represented by numerous clades in the Early Jurassic. By the Late Jurassic and Cretaceous, however, the clade featured members almost exclusively belonging to the Ophthalmosauria [ 4 – 8 ]. The transition of these two distinct faunas occurred in the Middle Jurassic.…”

Section: Introductionmentioning

confidence: 99%

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A large new Middle Jurassic ichthyosaur shows the importance of body size evolution in the origin of the Ophthalmosauria

Miedema,

Bastiaans,

Scheyer

et al. 2024

BMC Ecol Evo

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The Middle Jurassic is an important time period for the evolutionary history of marine reptiles as it represented a transitional phase for many clades. Notably, in ichthyosaurs, many early parvipelvian taxa went extinct. The Middle Jurassic saw the emergence of the derived Ophthalmosauria, ultimately becoming the dominant ichthyosaurian clade by the end of the epoch. Even though this is an important period in the evolutionary history of Ophthalmosauria, our understanding remains limited in terms of morphology and taxonomy due to the scarcity of vertebrate-bearing strata. Here we present a large new ichthyosaur from the Bajocian of Switzerland, represented by an almost complete skull with 3D-preserved bones, the (inter)clavicles and a large portion of the postcranial skeleton. After CT- and surface scanning, we reconstructed the 3D in vivo morphology. Our morphological observations and phylogenetic analyses show that the new taxon named Argovisaurus martafernandezi is nested at the base of the Ophthalmosauria. The holotype and only known specimen of Argovisaurus likely represents an adult individual. Bajocian members of the Ophthalmosauria (Mollesaurus and Argovisaurus) were large-bodied animals, a trait typically associated with the more derived Platypterygiinae. This hints at the importance of a large body size early in ophthalmosaurian evolution.LSID: urn:lsid:zoobank.org:act:C3312628-1544-4B87-BBE3-B12346A30BE3LSID: urn:lsid:zoobank.org:act:23C2BD71-8CF0-4D99-848A-0D631518415B

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Section: Introductionmentioning

confidence: 99%

“…By the Late Jurassic and Cretaceous, however, the clade featured members almost exclusively belonging to the Ophthalmosauria [4][5][6][7][8]. The transition of these two distinct faunas occurred in the Middle Jurassic.…”

Section: Introductionmentioning

confidence: 99%

A large new Middle Jurassic ichthyosaur shows the importance of body size evolution in the origin of the Ophthalmosauria

Miedema,

Bastiaans,

Scheyer

et al. 2024

BMC Ecol Evo

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“…Es importante señalar que otros colegas, tales como el Dr. Darío Lazo y la Dra. Marcela Cichowolski (Instituto de Estudios Andinos Don Pablo Groeber, Universidad de Buenos Aires) aportaron a las colecciones del MOZ el más antiguo espécimen de metriorrínquido hallado en la Cuenca Neuquina y proveniente del Batoniano de Chacay Melehue y los primeros restos de plesiosauroideos y de oftalmosáuridos del Cretácico Temprano(O'Gorman et al, 2015;Lazo et al, 2018).Con la finalidad de resumir más de 30 años de trabajos ininterrumpidos en la exploración y colecta de reptiles marinos en la provincia de Neuquén (MOZ-MLP) se optó por señalar los trabajos de campo con mayor impacto en la diversidad de resultados, siguiendo un ordenamiento temporal. Para ello se incluyó un mapa de ubicación (Fig.2), una tabla con los holotipos (Tab.…”

unclassified

Reptiles Fósiles Marinos Y Continentales Del Museo Provincial De Ciencias Naturales “Prof. Dr. Juan A. Olsacher” De Zapala, Provincia Del Neuquén

Gasparini¹,

Salgado²,

Garrido³

2022

PEAPA

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Resumen. Los estudios realizados en reptiles fósiles de las colecciones del museo "Prof. Dr. Juan A. Olsacher" de la ciudad de Zapala (Neuquén) se orientaron hacia formas marinas del Jurásico y formas continentales del Cretácico Inferior y Cretácico Superior en la Cuenca Neuquina. Vinculado a la Dirección Provincial de Minería de la provincia desde sus orígenes, el museo Olsacher prestó colaboración logística con grupos de investigación nacional e internacionales, entre los que sobresalen el grupo de reptiles marinos del Museo de La Plata. Desde 2008, el museo cuenta con personal de investigación encargado del estudio del contexto geológico y tafonómico de los restos fósiles hallados. Como resultado de las campañas realizadas en los últimos 50 años, las cuales contaron con el apoyo logístico del museo Olsacher, la institución incorporó a sus colecciones una gran cantidad de especímenes, entre ellos 15 holotipos, 7 de reptiles marinos y 8 de dinosaurios.

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The Paleoneurology of Ichthyopterygia and Sauropterygia: Diverse Endocranial Anatomies of Secondarily Aquatic Diapsids

Allemand

Moon²,

Voeten³

2022

Paleoneurology of Amniotes

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Description of ichthyosaur remains from the Lower Cretaceous Agrio Formation (Neuquén Basin, west-central Argentina) and their paleobiological implications

Cited by 12 publications

References 51 publications

A large new Middle Jurassic ichthyosaur shows the importance of body size evolution in the origin of the Ophthalmosauria

A large new Middle Jurassic ichthyosaur shows the importance of body size evolution in the origin of the Ophthalmosauria

Reptiles Fósiles Marinos Y Continentales Del Museo Provincial De Ciencias Naturales “Prof. Dr. Juan A. Olsacher” De Zapala, Provincia Del Neuquén

The Paleoneurology of Ichthyopterygia and Sauropterygia: Diverse Endocranial Anatomies of Secondarily Aquatic Diapsids

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