A NEW GENUS AND 3 NEW SPECIES OF MONORCHIIDAE (TREMATODA) FROM FRESH-WATER FISH OF RONDONIA STATE, BRAZIL

A new genus and three new species of freshwater Monorchiidae (Trematod a) are described from the intestinal tracts of fish of Rondonia State, Brazil. Sphericomonorchis spinulosus gen. et sp. nov. from Crenicichl a johanna HECKEL, is characterized as having a small, compact body, a large. spherical testis near the posterior extremity and vitelline fol licles lateral to the acetabulum. Paraproctotrema delicata sp. nov., F rom Boulengerella lucia (CUVIER), is a slender species having a large acetabulum with vitellaria postero-lateral to it, a small cirrus sac a nd post-testicular uterine loops. The third species, Genolopa magnacir rus sp. nov., from the same host, has a cirrus sac from thirty to fift y percent of the body length, a testis near the posterior extremity an d vitellaria well posterior to the acetabulum.