Artículo
Arackar licanantay gen. et sp. nov. a new lithostrotian (Dinosauria, Sauropoda) from the Upper Cretaceous of the Atacama Region, northern Chile
Rubilar Rogers, David; Vargas, Alexander O.; Gonzalez Riga, Bernardo Javier
; Soto Acuña, Sergio; Alarcón Muñoz, Jhonatan; Iriarte Díaz, José; Arévalo, Carlos; Gutstein, Carolina Simon
Fecha de publicación:
08/2021
Editorial:
Elsevier
Revista:
Cretaceous Research
ISSN:
0195-6671
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
A new lithostrotian sauropod, Arackar licanantay gen. et sp. nov. is described based on a partial skeleton from the Upper Cretaceous (Campanian–Maastrichtian) beds of the Hornitos Formation, Atacama Region, northern Chile. The holotype consists of axial (cervical and dorsal vertebrae) and appendicular (humerus, femur and ischium) elements of a sub-adult specimen (ca. 6.3 m long). Autapomorphies characterizing this new titanosaur include: middle neural arches with wide and tall centroprezygapophyseal fossa + parapophyseal centroprezygapophyseal fossa (cprf + pacprf) extending on the entire anterior faces of the pedicles, but not above the neural canal, and reduced spinopostzygapophyseal laminae, shorter than the postzygapophyseal facet length. A phylogenetic analysis based on a data matrix of 87 taxa and 405 characters recovered Arackar as a derived lithostrotian titanosaur, placing it in a clade that includes Rapetosaurus + (Arackar + Isisaurus). This is the third dinosaur named from Chile and the third titanosaur from the western side of the Andes in South America.
Palabras clave:
ATACAMA REGION
,
LATE CRETACEOUS
,
LITHOSTROTIA
,
TITANOSAURIA
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(ICB)
Articulos de INSTITUTO INTERDISCIPLINARIO DE CIENCIAS BASICAS
Articulos de INSTITUTO INTERDISCIPLINARIO DE CIENCIAS BASICAS
Citación
Rubilar Rogers, David; Vargas, Alexander O.; Gonzalez Riga, Bernardo Javier; Soto Acuña, Sergio; Alarcón Muñoz, Jhonatan; et al.; Arackar licanantay gen. et sp. nov. a new lithostrotian (Dinosauria, Sauropoda) from the Upper Cretaceous of the Atacama Region, northern Chile; Elsevier; Cretaceous Research; 124; 8-2021; 1-18
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