From Suzuki Paleotax db:
1908 Amphisphaera spinosa n. sp. Carnevale p. 14, pl. 2, fig. 6
1927 Amphisphaera spinosa Carnevale Lucchese p. 85, pl. 3, fig. 17
1972 Stylosphaera sp. A Petrushevskaya & Kozlova p. 520, pl. 10, fig. 8
1978 Amphisphaera spinosa Carnevale Sanfilippo et al. p. 755
Catalog entries: Amphisphaera spinosa
Remarks on original description: [Bracketed age information from Sanfilippo, 1971, p.1122, 1125 and from Riedel and Sanfilippo, 1971, p.1580.
Synonymized with Stylosphaera hispida Ehrenberg group by Petrushevskaya 1975c.]
Geological Range:
Last occurrence (top): within Neogene Period (2.59-23.03Ma, top in Piacenzian stage). Data source: Lazarus et al. 2015 - "N age group"
First occurrence (base): within Neogene Period (2.59-23.03Ma, base in Aquitanian stage). Data source: Lazarus et al. 2015 - "N age group"
Plot of occurrence data:
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Amphisphaera spinosa compiled by the radiolaria@mikrotax project team viewed: 30-4-2025
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