CICTERRA 20351
CENTRO DE INVESTIGACIONES EN CIENCIAS DE LA TIERRA
Unidad Ejecutora - UE
artículos
Título:
Trilobites from the Suri Formation (Lower Ordovician; Floian), Famatina Belt, Argentina
Autor/es:
WAISFELD, B.G; VACCARI, N. E
Revista:
Memoirs of the Association of Australasian Palaeontologists
Editorial:
Association of Australasian Palaeontologists
Referencias:
Lugar: Camberra; Año: 2009 vol. 37 p. 407 - 426
ISSN:
0810-8889
Resumen:
A new trilobite fauna from the lower part of the Suri Formation (upper Floian) exposed in the central Famatina Belt, west Argentina, is reported. Three new species are described: Dividuagnostus tortelloi sp. nov., Bienvillia chaya sp. nov. and Hypermecaspis edselbrussai sp. nov. The remaining taxa include Nambeetella sp., Changchowilla sp., Porterfieldia sp. and undetermined telephinids. The trilobite assemblage is largely dominated by Hypermecaspis, and composed of a combination of sighted (olenids), blind (raphiophorids, shumardiids) and giant-eyed (telephinid) trilobites. The association matches the olenid biofacies recognised elsewhere in the Early Ordovician. This is the first well documented olenid biofacies recorded in Floian successions of western Argentina. The assemblage thrived in a largely volcanic setting, associated with environmental restriction linked to the early stages of evolution of the volcanic-arc.
