The Earliest Tupinambis Teiid from South America and Its Palaeoenvironmental Significance

Brizuela, Santiago; Albino, Adriana M.

doi:10.1670/131-03a

Cited by 24 publications

(25 citation statements)

References 5 publications

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“…Para el Pleistoceno y Holoceno hay citas de iguánidos en Ecuador, Argentina, Brasil y Chile, entre los cuales se reconoce Liolaemus, Leiosaurus, Tropidurus, Polychrus y cf. Enyalius (Hoffstetter, 1970;Van Devender, 1977;Albino, 2005;Núñez et al, 2005 (Hoffstetter, 1963(Hoffstetter, , 1968Chani, 1976;Estes, 1983;Sullivan y Estes, 1997;Ubilla y Perea, 1999;Brizuela y Albino, 2004, 2008a,b, 2012aAlbino et al, , 2013Pujos et al, 2009;Brizuela, 2010;Bolet y Evans, 2011 (Ameghino, 1893;Rovereto, 1914;Kraglievich, 1947;Hsiou, 2007), pero estudios recientes no han logrado sostener la validez de las mismas (Brizuela, 2010;Brizuela y Albino, 2008a, 2012b (Quintana et al, 2000(Quintana et al, , 2004.…”

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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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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“…Currently, members of Tupinambinae do not occur in North America and apparently are restricted to South America (Sullivan & Estes, 1997). Here, the fossil record is abundant for the Miocene-Holocene interval, where Tupinambis predominates, mainly in Argentina (Donadio, 1983, 1984a, Gasparini et al, 1986Brizuela & Albino, 2004) and Colombia (Estes, 1961(Estes, , 1983Sullivan & Estes, 1997). Donadio (1985) proposed the name Lumbrerasaurus scagliai for an Eocene tupinambinae from Argentina, on the basis of the cross section of the teeth and subtle differences in the morphology of the dorsal vertebrae, but this was considered a nomem dubium by Sullivan & Estes (1997).…”

Section: Introductionmentioning

confidence: 95%

A new Teiidae species (Squamata, Scincomorpha) from the Late Pleistocene of Rio Grande do Sul State, Brazil

Hsiou¹

2007

RBP

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-The fossil record of the Teiidae in South America is restricted almost exclusively to the Cenozoic, with the group mainly represented by Tupinambis during Miocene-Holocene times. Currently, this genus includes the largest lizards of the New World as well as the largest members of the family. Tupinambis uruguaianensis nov. sp., the first fossil squamate from Rio Grande do Sul State, is represented by a right lower jaw, basicranium, three dorsal vertebrae, and a left radius and ulna of the same individual. The material comes from the Touro Passo Formation, where reptiles were previously represented only by Testudines. The new species shares several characters with the living species of Tupinambis, but is distinguished from all them by an articular bone with a deeply concave ventral margin, angular process is more rounded, proportionally larger and projecting beyond the ventral and posterior adjacent limits, and a very protuberant adductor crest so that the lateral articular bone surface is lateroventrally directed.Key words: Squamata, Teiidae, Tupinambis, Late Pleistocene, Rio Grande do Sul State, southern Brazil.RESUMO -O registro da família Teiidae na América do Sul é restrito quase que exclusivamente ao Cenozóico e o grupo é principalmente representado por Tupinambis, no intervalo Mioceno-Holoceno. Atualmente este gênero inclui os maiores lagartos do Novo Mundo e os maiores membros da família. Tupinambis uruguaianensis sp. nov. é o primeiro Squamata registrado para o Pleistoceno final do Estado do Rio Grande do Sul, Brasil. O material inclui uma hemimandíbula direita, basicrânio, três vértebras dorsais, rádio e ulna esquerdos de um mesmo indivíduo, procedentes da Formação Touro Passo, cujos répteis eram antes representados apenas por Testudines. A nova espécie compartilha muitos caracteres das espécies recentes de Tupinambis, mas distingue-se de todas elas pelo articular com margem ventral marcadamente côncava; processo angular mais arredondado e proporcionalmente maior, projetando-se para além dos limites ventral e posterior adjacentes; e pela crista adutora muito proeminente, resultando numa face lateral do articular voltada látero-ventralmente.Palavras-chave: Squamata, Teiidae, Tupinambis, Pleistoceno final, Rio Grande do Sul, sul do Brasil.

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“…The fossil‐bearing beds of the Sarmiento Formation at Gaiman in Chubut Province (Fig. 6, 1) have provided one of the most relevant associations of Miocene squamatans, including the extant pleurodont iguanians Pristidactylus and Liolaemus , the modern teiid Tupinambis , the extinct boids Waincophis and Gaimanophis , and indeterminate ‘colubrids’ (Albino, 1996b, c, 2008; Brizuela & Albino, 2004). The remains were found associated with mammals characteristic of the Colhuehuapian SALMA, the calibration of which was proposed by Madden (2004) to be between 20 and 18.5 Ma at the Gran Barranca site (early Miocene).…”

Section: The Neogene and Extant Taxamentioning

confidence: 99%

“… Distribution of Patagonian Neogene squamatans: ★, continental ‘lizards’; •, snakes; 1, Gaiman (Albino, 1996b, c, 2008; Brizuela & Albino, 2004); 2, La Cueva (Ameghino, 1889); 3, Monte León (Ameghino, 1893; Brizuela & Albino, 2008a); 4, Monte Observatorio (Albino, 1996c); 5, Cañadón del Tordillo (Albino, 1996b; Brizuela & Albino, 2008b); 6, Río Pinturas (Albino, 1996c); 7, Pilcaniyeu Viejo (Albino, 1996b); ‐ ‐ ‐, southern range limit of extant tupinambine teiids; , southern range limit of extant ‘colubrids’. …”

Section: The Neogene and Extant Taxamentioning

confidence: 99%

Evolution of Squamata Reptiles in Patagonia based on the fossil record

Albino

2011

Biological Journal of the Linnean Society

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The Squamata, a vertebrate group that includes 'lizards', amphisbaenians and snakes, have inhabited Patagonia since the Late Cretaceous. The Mesozoic record comprises an iguanian, a scleroglossan and a great diversity of snakes that include, among others, the most primitive terrestrial forms. Snakes were also well diversified in the Palaeogene, with fossils of madtsoiids and boids (including the oldest record of the extant Boa) found as far south as 46°S, following the then dominant subtropical conditions in the region. The Palaeogene record comprises small, medium-sized and large forms. The only boids that persisted at the beginning of the Neogene are all small forms, suggesting colder temperatures than during the Palaeogene. The oldest South American 'colubrids' made their first appearance at this time, reaching latitudes south of the current Patagonian distribution (50°S). The Neogene record also includes the first occurrence of extant iguanians (Pristidactylus and Liolaemus) and teiids (Tupinambis). The latter reached the southernmost distribution of its evolutionary history during the Miocene. The distribution of boids, 'colubrids' and tupinambine teiids at higher latitudes than at present indicates warmer conditions during the Miocene. The uplift of the Patagonian Andes, followed by a decrease in temperature and an increase in desertification, induced a strong contraction in the distribution of tupinambine teiids to northern regions of Patagonia and even forced the complete disappearance of boids from this region. In contrast, these changes appear to have favoured the diversification of iguanian genera on both sides of the Patagonian Andes. Los Squamata ('lagartos', anfisbenas y serpientes) habitan la Patagonia desde el Cretácico tardío. El registro Mesozoico comprende un iguanio, un esclerogloso, y una gran diversidad de serpientes que incluye las formas terrestres más primitivas. Las serpientes estaban bien diversificadas durante el Paleógeno, con madtsoideos y boidos (incluyendo el registro más antiguo de la actual Boa) que alcanzaron altas latitudes (46°S) siguiendo las condiciones subtropicales dominantes en la región. En contraste con el Paleógeno, que incluye formas pequeñas, medianas y grandes, los únicos boidos que persisten a comienzos del Neógeno son todas formas pequeñas que sugieren temperaturas más bajas que durante el Paleógeno. Los más antiguos 'colúbridos' sudamericanos son del Neógeno, cuando alcanzan latitudes (50°S) al sur de su actual distribución. El registro del Neógeno también incluye la aparición de géneros actuales de lagartos iguanios (Pristidactylus y Liolaemus) y teidos (Tupinambis). Tupinambis alcanza la distribución más austral durante el Mioceno. La presencia de boidos, 'colúbridos' y teidos tupinambinos a mayores latitudes que en el presente indica condiciones más cálidas durante el Neógeno. El levantamiento de los Andes Patagónicos, seguido por la disminución de la temperatura y el incremento de la aridez, produjo una fuerte contracción en la distribución de teidos tupinam...

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The Earliest Tupinambis Teiid from South America and Its Palaeoenvironmental Significance

Cited by 24 publications

References 5 publications

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

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

A new Teiidae species (Squamata, Scincomorpha) from the Late Pleistocene of Rio Grande do Sul State, Brazil

Evolution of Squamata Reptiles in Patagonia based on the fossil record

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