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Larsen, A. R. (1976). Studies of Recent Amphistegina, Taxonomy and some Ecological Aspects. Israel Journal of Earth-Sciences. 25: 1-26. page(s): pl. 5
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Amphistegina bicirculata sensu Jones, R.W. 1994. The Challenger Foraminifera. Image source: Brady, H.B. (1884) Pl. 111 Note: Hallock Muller (2019) pers. comm. :" I think Plate 111 fig. 2a,b,c are better representations of A. bicirculata than is Plate 111 fig. 1a,b,c, which I suspect is an A. radiata. I suspect that Larsen referred to the wrong set of images." Plate 111 fig. 1a,b,c was originally included in the synonymies of A. bicirculata by Larsen (1976).
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Amphistegina radiata sensu Jones, R.W. 1994. The Challenger Foraminifera. Image source: Brady, H.B. (1884) Pl. 111
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Image source: Todd, R. 1965. The Foraminifera of the Tropical Pacific Collections of the ”Albatross”, 1899-1900. Part 4. Rotaliform families and planktonic families [End of Volume]. Bull. U.S. Nation. Mus 161: v+139 pp.+28 pls. This specimen was identified by Todd as Amphistegina lessonii (pl. 11 fig. 4). It is a typical A. radiata (pers comm. Pamela Hallock Muller, pers. comm. June 2019).
