| details |
Frasnian |
Famennian |
Brazil(Maranhao) |
Brito,I.M. et al. New occurrences of acritarchs in the Devonian of the Parnaiba Basin. (In: Paleobotanica e Palinologia na America do Sul; 1983) |
1984 |
| details |
Late Devonian |
|
Brazil(Paraiba) |
Grahn,Y. Revision of Silurian and Devonian strata in Brazil |
1992 |
| details |
Early Famennian |
|
|
Paris,F. et al. A revised chitinozoan classification |
1999 |
| details |
Late Frasnian |
|
|
Grahn,Y. Devonian chitinozoan biozones of Western Gondwana. |
2005 |
| details |
Late Frasnian |
Early Famennian |
|
Grahn,Y. Devonian chitinozoan biozones of Western Gondwana. |
2005 |