Dr. Murai Éva szerk.: Parasitologia Hungarica 16. (Budapest, 1983)

5. Acetabulum/body length ratio bigger than 1:4 6 - Acetabulum/body length ratio smaller than 1:4 7 6. Vitellaria extending caecal zone and partly pretesticular

, lateral C. inopinatus - Vitellaria extending caecal end, reaching anterior margin of testis, lateral C. corderoi - Vitellaria extending caecal end, reaching anterior end of testis, confluent posteriorly C. rodriguezi - Vitellaria postcaecal, posttesticular, lateral C. mirandai 7. Eggs longer than 100 urn 8 - Eggs shorter than lOOum 9 8. Testis and ovary separated by utrine coils C. uruguayensis Testis and ovary continous C. rochai 9. Diameter of acetabulum shorter than 0. 5 mm 10 - Diameter of acetabulum longer than 0. 5 mm 11 Fig. 26: Opisthodiscus diplodiscoides Cohn, Fig. 27: Megalodiscus americanus Chandler, 1904 (after Grabda-Kazubska, 1980) 1923 (after Chandler, 1923)