RE: primers, and South American dinosaurs

>  I don't know on what basis the Yacoraite, El Molino
> or Marilia are considered late Maastrichtian.

Strange. I've read that Marilia Fm., along with Adamantina Fm., are
correlated with Allen, Angostura Colorada and Los Alamitos Fms. on the basis
of the presence of the titanosaurid *Aeolosaurus*, and thus dated as Late
Campanian-Early Maastrichtian.

R. BERTINI, R. SANTUCCI, L. RIBEIRO, A. ARRUDA-CAMPOS. 2000. Aeolosaurus
(Sauropoda : Titanosauria)  from Upper Cretaceous of  Brazil. XVI Jornadas
Argentinas de Paleontología de Vertebrados (San Luis), Actas: 5.

R.M. SANTUCCI & R.J. BERTINI. 2001. Distribuiçao paleogeográfica e
biocronológica dos titanossauros (Saurischia, Sauropoda) do Grupo Bauru,
Cretáceo Superior do sudeste brasileiro. Revista Brasileira de Geociencias
31(3): 307-314.

I have the pdf of the last one (though is in Portuguese), if someone is
interested.

Cheers,

Matías Soto