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neotropical monogenoidea. 40. protorhinoxenus prochilodi gen. n., sp. n. (monogenoidea: ancyrocephalinae), parasite of prochilodus lineatus (characiformes: prochilodontidae) from south brazil.the monotypic protorhinoxenus gen. n. is proposed to accommodate a species with the following characteristics: 1) tubular sclerotised vagina, 2) vaginal pore dextrolateral, 3) ventral and dorsal anchors with undifferentiated elongate shaft and base (representing approximately 2/3 of the length of anchor), and 4) superficial and deep roots of ventral and dorsal anchors lacking. protorhinoxenus prochilodi sp. n. is described from the gills of prochilodus lineatus (valenciennes) of the represa capi ...200211993549
trophic position of bottom-feeding fish in the upper paraná river floodplain.the delta15n composition of bottom-feeding fish (iliophagous = apareiodon affinis, cyphocharax nagelii, prochilodus lineatus, steindachnerina brevipinna and s. insculpta; detritivorous = loricariichthys platymetopon and liposarcus anisitsi; benthophagous = satanoperca pappaterra and hoplosternum littorale) and their primary food sources were investigated in the upper paraná river floodplain during rainy seasons in different environments (lotic and lentic). two hypotheses were tested: i) that the ...200919738964
influence of host sex and age on infracommunities of metazoan parasites of prochilodus lineatus (valenciennes, 1836) (prochilodontidae) of the upper paraná river floodplain, brazil.149 specimens of prochilodus lineatus were collected on the upper paran6 river floodplain. of these, 121 (82.1%) were parasitized. 33 species of metazoan parasites were recorded. rhinonastes pseudocapsaloideum was classified as secondary, while all other species were classified as satellites. ergasilus sp. and tereancistrum curimba were positively associated and their abundances were positively correlated. saccocoelioides magnorchis and s. nanii were positively associated and their abundances we ...200516402561
neoechinorhynchus curemai (acanthocephala: neoechinorhynchidae) in prochilodus lineatus (osteichthyes: prochilodontidae) from the paraná river, brazil.this work evaluated parasitic infections by neoechinorhynchus curemai (acanthocephala: neoechinorhynchidae) in prochilodus lineatus captured between august 2000 and august 2001 in the paraná river, presidente epitácio, são paulo, brazil. of 87 fishes examined, 59 were infected (25 males and 34 females). high mean intensities occurred in august 2000 (45.2, range 2-204), september 2000 (28.5, range 11-73), october 2000 (59.3, range 2-250) and february 2001 (27.3, range 3-73). there was no relation ...200516112458
trophic morphology of five benthic-feeding fish species of a tropical floodplain.this study describes the morphology of the digestive apparatus and the size and organic content of the ingested food of five species of benthic-feeding fishes (prochilodus lineatus, steindachnerina insculpta, loricariichthys platymetopon, trachydoras paraguayensis e iheringichthys labrosus). the samples were taken in the floodplain of the up paraná river in february and august 1991. the results suggested that these species have different mouth, teeth, gill rakers, stomach and intestine length. t ...200111340459
new species of tereancistrum kritsky, thatcher & kayton, 1980 (monogenea: dactylogyridae: ancyrocephalinae) from the gills of prochilodus lineatus (osteichthyes: prochilodontidae) from the upper paraná river floodplain, brazil.two new species of tereancistrum kritsky, thatcher & kayton, 1980 are described from the gills of prochilodus lineatus (prochilodontidae) collected from the upper paraná river floodplain, brazil. t. toksonum n. sp. is characterised by a slim ventral bar with a sclerotised membrane along the anterior margin. another characteristic is the dorsal anchor with an elongated deep root. t. curimba n. sp. is similar to t. ornatus kritsky, thatcher & kayton, 1980 but possesses a sclerotised structure betw ...200414739674
a new species of kritskyia (dactylogyridae, ancyrocephalinae) parasite of urinary bladder of prochilodus lineatus (prochilodontidae, characiformes) from the floodplain of the high paraná river, brazil.a new species of kritskyia inhabits the urinary bladder of the "curimba", prochilodus lineatus in the floodplain of the high paraná river. the new species resembles others members of kritskyia in the following features: haptor lacking anchors and with 14 hooks marginal, posterior male copulatory organ non articulated with the accessory piece and vagina a sclerotized tube. however, it differs from the known species mainly by the shape of the copulatory complex. this is the third endoparasitic mon ...200212048557
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