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Article: Giant acanthomorph acritarchs from the Upper Proterozoic in southern Norway

Publication: Palaeontology
Volume: 33
Part: 2
Publication Date: May 1990
Page(s): 287 298
Author(s): Gonzalo Vidal
Addition Information

How to Cite

VIDAL, G. 1990. Giant acanthomorph acritarchs from the Upper Proterozoic in southern Norway. Palaeontology33, 2, 287–298.

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The Palaeontological Association (Free Access)


Large microfossils from a single phosphatic pebble in the late Riphean-early Vendian ( > 612+ 18 — 665+ 10 Ma) Biskopas Conglomerate in the Hedmark Group in southern Norway were described by Spjeldnaes (1963) under the name Papillomembrana compta and interpreted as a possible dasycladacean alga. The microfossils are evidently organic-walled and here regarded as giant acanthomorph acritarchs. The diagnosis of Papillomembrana compta is emended. Possibly related Proterozoic taxa are discussed. A new acanthomorph acritarch, Ericiasphaera spjeldnaesii gen. et sp. nov., found with P. compta within the same petrographic thin-section is described. Contrary to former conceptions, recent data seem to indicate that large complex acritarchs were common in late Proterozoic times.
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