First record of squamate reptiles from the Oligocene of South America

Albino, Adriana M.; Brizuela, Santiago

doi:10.1080/03115518.2014.886029

Cited by 13 publications

(12 citation statements)

References 36 publications

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“…This vertebra shows a characteristic teiid form: depressed, centrum flat and triangular in ventral view, presence of a well-defined zygosphene, presence of a deep depression between the zygosphenal articular facet and the prezygapophysis (Hoffstetter and Gasc 1969;Albino and Brizuela 2014), and taken together, these characters strongly suggest teiid relationships. The trunk vertebrae of the varanid genus Saniwa, present in the European Eocene, share some features with the vertebra from Perrière, in particular a depressed centrum and the presence of a zygosphene.…”

Section: Commentsmentioning

confidence: 95%

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Transient presence of a teiid lizard in the European Eocene suggests transatlantic dispersal and rapid extinction

Augé

Brizuela

2020

Palaeobio Palaeoenv

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Several teiid specimens (frontal, vertebra, maxillae) are described from the late Eocene of Europe (MP17, Phosphorites du Quercy). The results of phylogenetic analyses confirm that these European Eocene fossils belong to teiid lizards and more specifically to the subfamily Tupinambinae. So far, the Paleogene record of teiids is limited to South America and no occurrence of crown teiids is known in Europe. This disjunct distribution of teiids during the Eocene suggests transatlantic dispersal and this possibility is discussed. The presence of teiids in the European fossil record is brief (limited to standard level MP17). The circumstances that prevented the persistence of an invading clade in Europe are examined. Ecological (e.g. biotic interactions) and/or demographic (Allee effect) processes may have been involved.

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Section: Commentsmentioning

confidence: 95%

“…without marked borders) are indicative of tupinambine affinities. Variation exists in the depth of the zygosphene among teiids: while in the teiine it is shallow, it is deep in (adult) tupinambine (Albino and Brizuela 2014). The zygosphene in PRR 2006 appears to have an intermediate depth.…”

Section: Commentsmentioning

confidence: 96%

Transient presence of a teiid lizard in the European Eocene suggests transatlantic dispersal and rapid extinction

Augé

Brizuela

2020

Palaeobio Palaeoenv

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“…Además, la confirmación de la presencia de una forma extinta de Teiidae Tupinambinae, Lumbrerasaurus scagliai, en el Eoceno temprano de Argentina (Donadío, 1985;Brizuela y Albino, 2015), indica que esta familia ya entonces se encontraba diversificada en sus dos subfamilias, concordando con un posible origen en el Cretácico-Paleoceno, como lo proponen datos moleculares (Giugliano et al, 2007). Con respecto al Oligoceno, recientemente se reconoció un Iguanidae y especialmente un posible Iguaninae, el cual sugiere que el grupo tenía una distribución más extensa que la actual, alcanzando el norte de la Patagonia (Albino y Brizuela, 2014b).…”

Section: Los Lagartosunclassified

Avances en El Conocimiento De Los Reptiles Escamosos Fósiles Continentales De América Del Sur

Albino¹,

Brizuela²

2015

PEAPA

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“…The Madtsoiidae is a totally extinct snake lineage, which lived between the Upper Cretaceous (Cenomanian) and the Late Pleistocene. This family mostly had a Gondwanan distribution [4][5][6][7][8][9][10], and by the end of the Eocene disappeared everywhere except in Australia and Argentina [11,12]. These snakes were initially considered to be closely related to pythons and boas (e.g.…”

Section: Introductionmentioning

confidence: 99%

Palaeoecological inferences for the fossil Australian snakesYurlunggurandWonambi(Serpentes, Madtsoiidae)

et al. 2018

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Madtsoiids are among the most basal snakes, with a fossil record dating back to the Upper Cretaceous (Cenomanian). Most representatives went extinct by the end of the Eocene, but some survived in Australia until the Late Cenozoic. Yurlunggur and Wonambi are two of these late forms, and also the best-known madtsoiids to date. A better understanding of the anatomy and palaeoecology of these taxa may shed light on the evolution and extinction of this poorly known group of snakes and on early snake evolution in general. A digital endocast of the inner ear of Yurlunggur was compared to those of 81 species of snakes and lizards with known ecological preferences using three-dimensional geometric morphometrics. The inner ear of Yurlunggur most closely resembles both that of certain semiaquatic snakes and that of some semifossorial snakes. Other cranial and postcranial features of this snake support the semifossorial interpretation. While the digital endocast of the inner ear of Wonambi is too incomplete to be included in a geometric morphometrics study, its preserved morphology is very different from that of Yurlunggur and suggests a more generalist ecology. Osteology, palaeoclimatic data and the palaeobiogeographic distribution of these two snakes are all consistent with these inferred ecological differences.

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First record of squamate reptiles from the Oligocene of South America

Cited by 13 publications

References 36 publications

Transient presence of a teiid lizard in the European Eocene suggests transatlantic dispersal and rapid extinction

Transient presence of a teiid lizard in the European Eocene suggests transatlantic dispersal and rapid extinction

Avances en El Conocimiento De Los Reptiles Escamosos Fósiles Continentales De América Del Sur

Palaeoecological inferences for the fossil Australian snakesYurlunggurandWonambi(Serpentes, Madtsoiidae)

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