Upper Devonian (Frasnian) Radiolarian Fauna from the Gogo Formation, Western Australia

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Abstract
Polycystine radiolarian species recovered from a single sample of the Gogo Formation, Western Australia, are described and illustrated. The material derives from one of the samples used by Glenister and Klapper (1966) for their conodont zonation of the Canning Basin and is of Polygnathus asymmetricus Zone age. The well-preserved radiolarians include Ceratoikiscum, Palaeoscenidium, and representatives of 7 genera similar to entactinid forms known especially in Ohio [USA] (Foreman 1963), in the Urals [USSR] (Nazarov 1975) and Byelorussia (Nazarov and Kruycheck 1977). Somewhat surprisingly, and apparently because of differences in stratigraphic level or biofacies, there is less similarity to the radiolarian assemblage of the Gogo Formation recently described by Nazarov, Cockbain and Playford (1982). Newly described taxa include 1 new genus, HELENIFORE, and 4 new species, H. laticlavium, Helioentactinia perjucunda, Spongentactinella corynacantha, and Ceratoikiscum vimenum. [Other species described include Entactinia sp. 1 cf. dissora Nazarov, Entactinia sp. 2 cf. E. micula Foreman, E. additiva Foreman sensu Nazarov and Ormiston, Entactinosphaera? echinata (Hinde), Entactinosphaera sp. cf. E. grandis Nazarov, Astroentactinia stellata Nazarov, A. paronae (Hinde), Haplentactinia sp. cf. H. rhinophyusa Foreman, and Palaeoscenidium cladophorum Deflandre.].

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