original |
Middle Emsian |
Late Emsian |
Canada(New Brunswick) |
Richardson,J.B. et al. The spores of Leclercqia and the dispersed spore Morphon Acinosporites lindlarensis, Riegel; A case of gradualistic evolution. |
1993 |
original |
Eifelian |
Early Givetian |
Canada(Arctic) |
Richardson,J.B. et al. The spores of Leclercqia and the dispersed spore Morphon Acinosporites lindlarensis, Riegel; A case of gradualistic evolution. |
1993 |
original |
Middle Emsian |
Late Emsian |
Canada(Ontario) |
Richardson,J.B. et al. The spores of Leclercqia and the dispersed spore Morphon Acinosporites lindlarensis, Riegel; A case of gradualistic evolution. |
1993 |