Triassic conchostracans from Antofagasta, Atacama and Coquimbo Regions, Chile.

摘要

Conchostracans from different Triassic localities of Chile are described and references to previous studies are made. The fauna comprises: Menucoestheria terneraensis gen. et sp. Nov. from La Ternera Formation (Upper Triassic) and 'La Coipa Beds' (Lower Triassic); Menucoestheria puquenensis sp.nov.from the Pichidangui? And Profeta? Formations (Upper Triasic); Liograpta troncosoi sp.nov. form 'La Coipa Beds' (Lower Triassic) and Asmussia? Sp.form Profeta? Formation (Upper Triassic). A few remarks on the geographical distribution, biochrons and taxonomic implicances of the described taxons are made.