| details |
Early Ludlovian |
Middle Ludlovian |
Argentina(San Juan) |
Rubinstein,C.V. Acritarch from the Silurian of the Jachal River Valley (Los Esp Formation), San Juan Province, Republica Argentina Subgroups Herkumorphita, Netromorphitae and Polgonomorphitae |
1989 |
| details |
Late Ludlovian |
Pridolian |
Argentina(San Juan) |
Rubinstein,C.V. Palynology of the Upper Silurian (Los Espejos Formation) of the Quebrada de Las Aquaditas San Juan Precordillera, Argentina. |
1992 |
| details |
Late Ludlovian |
Early Pridolian |
Argentina(San Juan) |
Rubinstein,C.V. Acritarchs from the Upper Silurian of San Juan, Argentina: Biostratigraphy and palaeobiogeography. (In: Contributions to Acritarch and Chitinozoan Research. S.G.Molyneux and K.J.Doring, editors) |
1993 |