1. 1. Amin, O. M. 1985. Classification. pp. 22-72. In: Biology of the Acanthocephala (Crompton, D. W. T. and Nickol, B. B. eds.), Cambridge University Press, London.
2. 2. Amin, O. M., Canaris, A. G. and Kinsella, J. M. 1999. A taxonomic reconsideration of the genus Plagiorhynchus s. lat. (Acanthocephala: Plagiorhynchidae), with descriptions of South African Plagiorhynchus (Prosthorhynchus) cylindraceus from shore birds and P. (P.) malayensis, and a key to the species of the subgenus Prosthorhynchus. J. Helminth. Soc. Wash. 66: 123-132.
3. 3. Belopolskaja, M. M. 1959. [Die Parasitfauna der Vögel des südsuchinschen Naturschutzgebietes (Ferner Osten); Acanthocephala]. Par. Sborn. Zool. Inst. Akad. Nauk SSSR 18: 304-320 (in Russian with German abstract).
4. 4. Ching, H. L., Leighton, B. J. and Stephen, C. 2000. Intestinal parasites of raccoons (Procyon lotor) from southwest British Columbia. Can. J. Vet. Res. 64: 107-111.
5. 5. Ewald, J. A., Crompton, D. W. T., Johnson, I. and Stoddart, R. C. 1991. The occurrence of Centrorhynchus (Acanthocephala) in shrews (Sorex araneus and Sorex minutus) in the United Kingdom. J. Parasitol. 77: 485-487.