info:eu-repo/semantics/article
Lower Cretaceous ammonites from the Neuquén Basin, Argentina: The neocomitids of the Pseudofavrella angulatiformis Zone (upper Valanginian)
Fecha
2010-06Registro en:
Aguirre-Urreta, Maria Beatriz; Rawson, Peter F.; Lower Cretaceous ammonites from the Neuquén Basin, Argentina: The neocomitids of the Pseudofavrella angulatiformis Zone (upper Valanginian); Academic Press Ltd - Elsevier Science Ltd; Cretaceous Research; 31; 3; 6-2010; 321-343
0195-6671
CONICET Digital
CONICET
Autor
Aguirre-Urreta, Maria Beatriz
Rawson, Peter F.
Resumen
The Pseudofavrella angulatiformis Zone (upper Valanginian) of the Agrio Formation in the Neuquén Basin, Argentina, is characterized exclusively by a complex sequence of neocomitid faunas that are sandwiched between the olcostephanids of the underlying Viluceras permolestus Subzone beneath and the holcodiscid faunas of the Holcoptychites neuquensis Zone above (lowermost Hauterivian). Three successive neocomitid genera, Pseudofavrella, Chacantuceras and Decliveites gen. nov., characterize three subzones. Over half the taxa are new: Pseudofavrella robusta, P. sp. nov. 1 and 2, Chacantuceras casanuestraense, Chacantuceras coniunctum, Decliveites crassicostatus, and Decliveites agrioensis.