| original |
Griesbachian |
Spathian |
Canada(Arctic) |
Staplin,F.L. Triassic microplankton, Sverdrup Basin, Arctic Canada. |
1978 |
| details |
Late Scythian |
|
Canada(Arctic) |
Ford,J.H. Palynology of Triassic and Jurassic Field samples, cores and cuttings from the Sverdrup Basin of Arctic Canada |
1979 |
| details |
Smithian |
Spathian |
Canada(Arctic) |
Ford,J.H. Palynology of 75 Mesozoic Field samples from the Sverdrup Basin of Arctic Canada |
1980 |
| details |
Smithian |
|
Canada(NWT) |
Boersma,M. et al. Triassic palynomorphs, index to genera and species |
1987 |
| details |
Triassic |
|
Nd |
Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. |
1990 |
| details |
Triassic |
|
Canada(Arctic) |
Sarjeant,W.A.S. et al. The Micrhystridium and Veryhachium Complexes (Acritarcha: Acanthomorphitae and Polygonomorphitae): A taxonomic reconsideration. |
1994 |
| details |
Nd |
|
Nd |
Stancliffe,R.P.W. et al. The acritarch genus Veryhachium Deunff,1954, emend., Sarjeant and Stancliffe,1994: A taxonomic restudy and a reassessment of its constituent species. |
1994 |