Vaughan, T. W. (1929). Actinosiphon semmesi, a new genus and species of orbitoidal foraminifera, and Pseudorbitoides trechmanni H. Douvillé. Journal of Paleontology. 3: 163-169.
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Vaughan, T. W.
1929
Actinosiphon semmesi, a new genus and species of orbitoidal foraminifera, and Pseudorbitoides trechmanni H. Douvillé