Author:
Fensome,R.A.;Williams,G.L.;Barss,M.S.;Freeman,J.M.;Hill,J.M.
Year:
1990
Title:
Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa.
Reference:
Fensome,R.A. et al. (1990) Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. American Association of Stratigraphic Palynologists, Contributions Series # 25 P. 1- 771
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Genus Species Country(Region) From To
Orthosphaeridium Orthosphaeridium chondrodora Nd Late Ordovician
Orthosphaeridium Orthosphaeridium clavum France(Finistere) Caradocian
Orthosphaeridium Orthosphaeridium densigranosum Nd Middle Ordovician
Orthosphaeridium Orthosphaeridium densiverrucosum Nd Middle Ordovician
Orthosphaeridium Orthosphaeridium gaspesianum Nd Caradocian
Orthosphaeridium Orthosphaeridium inflatum Nd Late Ordovician
Orthosphaeridium Orthosphaeridium insculptum Nd Late Ordovician
Orthosphaeridium Orthosphaeridium macroceros France(Finistere) Caradocian
Orthosphaeridium Orthosphaeridium occultatum Nd Late Llanvirnian
Orthosphaeridium Orthosphaeridium octospinosum Nd Llandoverian
Orthosphaeridium Orthosphaeridium procerum Nd Late Llanvirnian
Orthosphaeridium Orthosphaeridium quadricorne Nd Late Llanvirnian
Orthosphaeridium Orthosphaeridium quadrinatum Nd Late Llanvirnian
Orthosphaeridium Orthosphaeridium rectangulare Nd Ashgillian
Orthosphaeridium Orthosphaeridium ternatum Nd Late Llanvirnian
Orthosphaeridium Orthosphaeridium trabeculatum Nd Middle Ordovician
Orthosphaeridium Orthosphaeridium transitorium Nd Late Llanvirnian