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Babibasiliscus is an extinct genus of casquehead lizard (family Corytophanidae) that lived in what is now Wyoming during the early Eocene, approximately 48 million years ago. The genus is known from a single species, Babibasiliscus alxi, which was named by paleontologist in 2015 on the basis of a fossilized skull from the Bridger Formation in the Green River Basin. The name Babibasiliscus comes from the Shoshoni word babi, meaning "older male cousin", and Basiliscus, a modern-day genus of casquehead lizards. The specimen is undeformed and nearly complete except for the tip of the snout and the top of the skull, making it unclear whether the distinctive bony crest of living corytophanids was present in prehistoric relatives like Babibasiliscus. The skull is about 42 millimetres (2 in) in l

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  • Babibasiliscus (en)
  • Babibasiliscus (es)
  • Babibasiliscus (uk)
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  • Babibasiliscus is an extinct genus of casquehead lizard (family Corytophanidae) that lived in what is now Wyoming during the early Eocene, approximately 48 million years ago. The genus is known from a single species, Babibasiliscus alxi, which was named by paleontologist in 2015 on the basis of a fossilized skull from the Bridger Formation in the Green River Basin. The name Babibasiliscus comes from the Shoshoni word babi, meaning "older male cousin", and Basiliscus, a modern-day genus of casquehead lizards. The specimen is undeformed and nearly complete except for the tip of the snout and the top of the skull, making it unclear whether the distinctive bony crest of living corytophanids was present in prehistoric relatives like Babibasiliscus. The skull is about 42 millimetres (2 in) in l (en)
  • Babibasiliscus es un género extinto de lagarto coritofánido que vivió en lo que hoy es Wyoming, Estados Unidos durante el inicio del Eoceno, aproximadamente 48 millones de años. El género solo abarca a una única especie, Babibasiliscus alxi, la cual fue nombrada por el paleontólogo en 2015 basándose un cráneo fosilizado hallado en la en la cuenca del río Green. El nombre Babibasiliscus proviene de la palabra shoshoni babi, que significa "antiguo primo", y Basiliscus, el género moderno de lagartos conocidos como basiliscos. El espécimen no presenta deformación y está casi completo, exceptuando la punta del hocico y la parte superior del cráneo, lo que hace incierto si la distintiva cresta ósea de los actuales coritofánidos ya estaba presente en sus parientes extintos como Babibasiliscus. (es)
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  • Conrad, 2015 (en)
fossil range
  • Early Eocene, (en)
taxon
  • Babibasiliscus (en)
type species
  • Babibasiliscus alxi (en)
type species authority
  • Conrad, 2015 (en)
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  • Babibasiliscus is an extinct genus of casquehead lizard (family Corytophanidae) that lived in what is now Wyoming during the early Eocene, approximately 48 million years ago. The genus is known from a single species, Babibasiliscus alxi, which was named by paleontologist in 2015 on the basis of a fossilized skull from the Bridger Formation in the Green River Basin. The name Babibasiliscus comes from the Shoshoni word babi, meaning "older male cousin", and Basiliscus, a modern-day genus of casquehead lizards. The specimen is undeformed and nearly complete except for the tip of the snout and the top of the skull, making it unclear whether the distinctive bony crest of living corytophanids was present in prehistoric relatives like Babibasiliscus. The skull is about 42 millimetres (2 in) in length and the entire body is estimated to have been about 0.6 metres (2 ft) long. Bones on the right side of lower jaw of the specimen are thickened and fused together, suggesting that the jaw had broken and healed when the animal was alive. Babibasiliscus occurs farther north than any living genus of corytophanid. During the Eocene temperatures in what is now Wyoming were about 9 °C (16 °F) warmer than they are today, and the region was likely covered by a tropical forest based on other Eocene fossil assemblages known from western North America. Phylogenetic analysis indicates that Babibasiliscus is deeply nested within Corytophanidae as the sister taxon of the living genus Laemanctus. Below is a cladogram from Conrad's description of Babibasiliscus showing its relationships to other corytophanids: (en)
  • Babibasiliscus es un género extinto de lagarto coritofánido que vivió en lo que hoy es Wyoming, Estados Unidos durante el inicio del Eoceno, aproximadamente 48 millones de años. El género solo abarca a una única especie, Babibasiliscus alxi, la cual fue nombrada por el paleontólogo en 2015 basándose un cráneo fosilizado hallado en la en la cuenca del río Green. El nombre Babibasiliscus proviene de la palabra shoshoni babi, que significa "antiguo primo", y Basiliscus, el género moderno de lagartos conocidos como basiliscos. El espécimen no presenta deformación y está casi completo, exceptuando la punta del hocico y la parte superior del cráneo, lo que hace incierto si la distintiva cresta ósea de los actuales coritofánidos ya estaba presente en sus parientes extintos como Babibasiliscus. El cráneo mide 42 milímetros de longitud​ y se estima que el cuerpo completo debió medir cerca de 60 centímetros de largo.​ Los huesos del lado derecho de la mandíbula del espécimen están engrosados y fusionados, lo que sugiere que la mandíbula se rompió y sanó cuando el animal estaba con vida.​ Babibasiliscus aparece más al norte que cualquier género moderno de coritofánido. Durante el Eoceno las temperaturas en lo que ahora es Wyoming eran cerca de 9° centígrados por encima de las que se presentan actualmente, y la región estaba probablemente cubierta por un bosque tropical basándose en otros depósitos conocidos del oeste de América del Norte.​​ Un análisis filogenético indica que Babibasiliscus está profundamente imbricado dentro de la familia Corytophanidae siendo el taxón hermano del género moderno Laemanctus. A continuación se encuentra un cladograma basado en la descripción de Conrad de Babibasiliscus mostrando sus relaciones con otros coritofánidos:​ (es)
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