L. H.  Hyman, ?Studies on the morphology, taxonomy, and distribution of North American triclad Turbellaria. VI. A new Dendrocoelid from Montana, Dendrocoelopsia vaginatus n. sp.?, Transactions of the American Microscopical Society , vol. 54, pp. 338-345, 1935.

L. H.  Hyman, ?Studies on the morphology, taxonomy, and distribution of North American Triclad Turbellaria. VII. The two species confused under the name Phagocata gracilis, the validity of the generic name Phagocata?, Transactions of the American Microscopical Society, vol. 56, pp. 298-310, 1937.

L. H.  Hyman, ?Studies on the morphology, taxonomy, and distribution of North American Triclad Turbellaria. VIII. Some cave planarians of the United States?, Transactions of the American Microscopical Society, vol. 56, no. 4, pp. 457-477, 1937.

L. H.  Hyman, ?North American triclad Turbellaria. IX. The priority of Dugesia Girard 1850 over Euplanaria Hesse 1897 with notes on American species of Dugesia?, Transactions of the American Microscopical Society, vol. 58, pp. 264-275, 1939.

P. B.  Sivickis, ?The freshwater planarians of the Phillipines?, Transactions of the American Microscopical Society, vol. 47, pp. 356-365, 1928.