| details |
Wenlockian |
|
England |
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 Dorsennidium, Wicander, 1974, emend.Sarjeant and Stancliffe,1994: A reassessment of its constituent species |
1996 |
| details |
Gorstian |
|
Sweden(Gotland) |
Stricanne,L. et al. Acritarch distribution along an inshore-offshore transect in the Gorstian (lower Ludlow) of Gotland, Sweden |
2004 |