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
Tytthodiscus Tytthodiscus suevicus Nd Late Liassic
Tytthodiscus Tytthodiscus suevicus Nd Early Jurassic
Tytthodiscus Tytthodiscus suevicus Nd Late Liassic
Tytthodiscus Tytthodiscus vanderhammenii Nd Late Eocene Oligocene
Ulanisphaeridium Ulanisphaeridium Nd Nd
Ulanisphaeridium Ulanisphaeridium berryense Nd Late Permian
Umbellasphaeridium Umbellasphaeridium Nd Nd
Umbellasphaeridium Umbellasphaeridium deflandrei Nd Emsian
Umbellasphaeridium Umbellasphaeridium huecospinosum Nd Emsian
Umbellasphaeridium Umbellasphaeridium saharicum Nd Famennian
Uncinisphaera Uncinisphaera Nd Nd
Uncinisphaera Uncinisphaera acantha Nd Givetian
Uncinisphaera Uncinisphaera imaguncula Nd Frasnian
Uncinisphaera Uncinisphaera lappa Nd Late Devonian
Uncinisphaera Uncinisphaera obsoleta Nd Frasnian
Uncinisphaera Uncinisphaera protea Nd Arenigian
Uncinisphaera Uncinisphaera tribulosa Nd Gedinnian