Artículo
A new furileusaurian abelisaurid from La Invernada (Upper Cretaceous, Santonian, Bajo de la Carpa Formation), northern Patagonia, Argentina
Gianechini, Federico Abel
; Méndez, Ariel Hernán
; Filippi, Leonardo Sebastián
; Paulina Carabajal, Ariana
; Juarez Vallieri, Rubén N.; Garrido, Alberto Carlos
Fecha de publicación:
04/2021
Editorial:
Society of Vertebrate Paleontology
Revista:
Journal of Vertebrate Paleontology
ISSN:
0272-4634
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Abelisaurids are among the most abundant and diverse Patagonian Late Cretaceous theropods. Here, we present a new furileusaurian abelisaurid, Llukalkan aliocranianus gen. et sp. nov., represented by cranial remains from the Bajo de la Carpa Formation (Santonian) at La Invernada fossil area, northwestern Patagonia. Features characterizing this taxon include a possible caudal tympanic recess posterior to the columellar recess, a T-shaped lacrimal with jugal ramus lacking a suborbital process, and large foramina for caudal middle cerebral veins widely separated from the median supraoccipital crest. In addition to this, a bulge on the anteromedial border of the supratemporal fossa, tall and posteriorly projected paroccipital processes, basal tubera interconnected distally, a triangular basisphenoid recess, and a single foramen for the sphenoidal artery on the basisphenoid, differentiate Llukalkan from Viavenator exxoni. The latter is the other furileusaurian taxon from the same area and stratigraphic unit. Although the holotype of Llukalkan probably corresponds to a sub-adult—as the lacrimal morphology suggests— the possibility that it represents a juvenile of V. exxoni is discarded based mainly on the presence of a caudal tympanic recess (which is absent in V. exxoni). The probable coexistence of two abelisaurid taxa demonstrates that the abelisaurids were one of the most important—and likely the main—predator component of the ecosystems, not only in this area, but also in all of Patagonia, during the Late Cretaceous.
Palabras clave:
ABELISAURIDAE
,
BRAINCASE
,
PALEONEUROLOGY
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(IMIBIO-SL)
Articulos de INST. MULTIDICIPLINARIO DE INV. BIO. DE SAN LUIS
Articulos de INST. MULTIDICIPLINARIO DE INV. BIO. DE SAN LUIS
Articulos(INIBIOMA)
Articulos de INST. DE INVEST.EN BIODIVERSIDAD Y MEDIOAMBIENTE
Articulos de INST. DE INVEST.EN BIODIVERSIDAD Y MEDIOAMBIENTE
Citación
Gianechini, Federico Abel; Méndez, Ariel Hernán; Filippi, Leonardo Sebastián; Paulina Carabajal, Ariana; Juarez Vallieri, Rubén N.; et al.; A new furileusaurian abelisaurid from La Invernada (Upper Cretaceous, Santonian, Bajo de la Carpa Formation), northern Patagonia, Argentina; Society of Vertebrate Paleontology; Journal of Vertebrate Paleontology; 40; 6; 4-2021; 1-28
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