original description(ofSchwagerina astricta Skinner & Wilde, 1965 †)Skinner, J. W.; Wilde, G. L. (1965). Permian biostratigraphy and fusulinid faunas of the Shasta Lake area, northern California. <em>The University of Kansas Paleontological Contributions, Protozoa.</em> 6: 1-98., available online athttp://hdl.handle.net/1808/3813[details] Available for editors [request]
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