| details |
Nd |
|
Nd |
Williams,G.L. et al. The Lentin and Williams Index of Fossil Dinoflagellates.1998 Edition. |
1998 |
| details |
Nd |
|
Nd |
Venkatachala,B.S. et al. Occurence of Veryhachium and its implication on the age of the Vaishnodevi Limestone, Jammu |
1998 |
| details |
Nd |
|
Nd |
Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. |
1990 |
| details |
Nd |
|
Nd |
Downie,C. et al. Bibliography and index of fossil dinoflagellates and acritarchs. |
1965 |
| original |
Late Ordovician |
|
France(Finistere) |
Deunff,J. On the presence of microorganisms (Hystrichospheres) in the Ordovician of Finistere. |
1951 |