Tupinambine teiids from the middle Miocene of north-western Patagonia (Argentina)

Brizuela

2014

The Anatomical Record

Self Cite

The evolution of squamates in South America is the result of the complex geological and paleoclimatic history of this part of the world. The incomplete and episodic fossil record allows us to know only a small part of this evolution. Most Mesozoic squamate remains come from the Patagonian region, but remarkable specimens have also been recovered from Brazil. Both major squamate clades (Iguania and Scleroglossa) are pres-

Section: Resultsmentioning

confidence: 99%

An Overview of the South American Fossil Squamates

Brizuela

2014

The Anatomical Record

Self Cite

“…7) (and probable Tupinambis ) were found in several Miocene localities of Patagonia, including Gaiman in the province of Chubut (early Miocene), Monte León in the province of Santa Cruz (early–middle Miocene) and Cañadón del Tordillo in the province of Neuquén (middle Miocene) (Fig. 6, 1, 3, 5) (Brizuela & Albino, 2004, 2008a,b). Monte León (50°19′S) and Cañadón del Tordillo (70°05′W) are the southernmost and westernmost localities, respectively, at which specimens of tupinambine teiids have been found (Fig.…”

Section: The Neogene and Extant Taxamentioning

confidence: 96%

“… 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%

“…6, 1, 3, 5) (Brizuela & Albino, 2004, 2008a. Monte León (50°19′S) and Cañadón del (Albino, 1996b(Albino, , c, 2008Brizuela & 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'. Tordillo (70°05′W) are the southernmost and westernmost localities, respectively, at which specimens of tupinambine teiids have been found (Fig.…”

Section: The Neogene and Extant Taxamentioning

confidence: 99%

See 1 more Smart Citation

Evolution of Squamata Reptiles in Patagonia based on the fossil record

Biological Journal of the Linnean Society

2011

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...

“…Other lizard remains from the Early-Middle Miocene of southernmost Patagonia, that were considered extinct genera (Diasemosaurus Ameghino, 1893 andDibolosodon Ameghino, 1893), have been recently reevaluated as belonging to the genus Tupinambis (Brizuela & Albino, 2008a). Also, Albino et al (2006) and Brizuela & Albino (2008b) recognized the presence of Tupinambis or Crododilurus for the Middle Miocene of northwestern Patagonia. For the Late Miocene of central and northeastern Argentina the genus Tupinambis was also recorded (Ambrosetti, 1890;Estes, 1983;Donadío, 1984;Albino et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

First lizard remains (Teiidae) from the Miocene of Brazil (Solimões Formation)

Hsiou

Ferigolo³

2009

Rev. bras. paleont.

The South American Teiidae fossil record is restricted to the Cenozoic, and the most conspicuous remains were found in Early to Late Miocene of Argentina and Middle Miocene of Colombia and Peru, all represented by Tupinambinae lizards. Here, we describe a right fragmentary dentary and one dorsal vertebra collected in the Solimões Formation at the Talismã locality, situated on the Purus River, in the southwestern Brazilian Amazonia (Late Miocene). The material is tentatively conferred to the extinct genus Paradracaena. It represents the first record of lizards for the Neogene southwestern Brazilian Amazonia.