The global fauna of Didymozoidae infecting fishes is very diverse and includes 270 species. Integrative taxonomic studies in this group are rare, genetic data lacking for the molecular identification In study, a new genus species, Platodidymocystis yamagutii n. gen., sp., described based on morphological analyses. allocated to Didymozoinae but differs from all other genera subfamily, mainly by morphology testes ovary. analysis phylogeny using 28S rDNA ITS2 markers showed P. sp. unique...

This study presents results from several expeditions in 1985, 1991-1995 and 2003 to the Medium Paraná River section that begins below Itaipu Dam ends at trinational border of Brazil, Argentina Paraguay, lotic lentic zones reservoir Hydroelectric Power Station “Itaipu Binacional” (localities Foz do Iguaçu, Santa Helena Guaira). Ninety-eight species freshwater fishes belonging 22 families were examined for helminths. A host-parasite list based on Acanthocephala, Cestoda, Digenea, Monogenea...

Abstract During studies on fish parasites, two new species of Anacanthorus were found parasitizing serrasalmid fishes, simpliciphallus sp. n. from the hybrid Piaractus mesopotamicus x brachypomus and brandtii Serrasalmus brandtii. resembles reginae in morphology male copulatory organ (MCO) accessory piece but differs A. terms smaller size piece, which corresponds approximately half MCO by presence a conspicuous metraterm, with membranous terminal region. scapanus expansion jegui ratio (male...

Two hundred and ten species from Mexico, 155 the Caribbean (Bahamas, Bermuda, Cuba, Dominican Republic, Guadeloupe, Jamaica, Puerto Rico Trinidad) 63 Central America (Costa Rica, El Salvador, Guatemala, Nicaragua Panama) with hosts geographical distribution are listed in this contribution, bringing up to date knowledge of Latin monogenean fauna. A host parasite list is presented.

Ultrastructural observations of spermatogenesis and sperm development Saccocoelioides godoyi, an intestinal parasite Leporinus friderici (Bloch, 1794) are described. The irregular-shaped spermatogonia form a peripheral layer, show prominent nucleus. Spermatocytes larger than spermatogonia, in the early stage present synaptonemal complex. Spermatids nuclei smaller spermatocytes. Spermiogenesis is characterized by outgrowth zone differentiation, presenting basal bodies, separated...

Material collected from the fishes dams and fish farms of Departamento Nacional de Obras contra as Secas (DNOCS) tanks Itaipu Hydroelectric Station was examined in order to analyze index infestation Monogenea. Specimens tambaqui (Colossoma macropomum), pacu (Piaractus mesopotamicus), pirapitinga brachypomus) hybrid tambacu macropomum X Piaractus mesopotamicus) were five species Monogenea identified including: Mymarothecium viatorum Boeger, Piasecki & Sobecka, 2002, boegeri Cohen Kohn,...

Two species of Cosmetocleithrum Kritsky, Thatcher & Boeger, 1986 (both new) and two Demidospermus Suriano, 1983 (one are reported from the gills catfish Auchenipterus nuchalis, popularly known as “mapará”, Tocantins River tributaries, North Region Brazil. berecae n. sp. differs all other presently in genus by morphology anchors presenting an elongate shaft short recurved point, a coiled male copulatory organ (MCO) with three rings, slender accessory piece bifurcated distal end. nunani...

Mymarothecium boegeri sp.n. (Monogenea: Dactylogyridae) is described from the gills of Colossoma macropomum Cuvier (Characidae), collected aquaria "Centro de Pesquisas em Aquicultura, Departamento Nacional Obras Contra as Secas (DNOCS)", Pentecoste City, State Ceará, Brazil.Mymarothecium viatorum Boeger, Piasecki et Sobecka, 2002 reported type host, Piaractus brachypomus (Cuvier) (Characidae) and a new P. mesopotamicus (Holmberg) confirming occurrence M. in Neotropical Region.The species...

During a long-term study of the parasites fishes from Paraná River, both below and above reservoir Itaipu Hydroelectric Power Station, State Paraná, Brazil, specimens 10 species Dactylogyridae (9 new one previously known) were collected gills Salminus brasiliensis. The following are described illustrated: Anacanthorus douradensis sp. n., A. bicuspidatus daulometrus contortus parakruidenieri Annulotrematoides bryconi Cuglianna, Cordeiro Luque, 2003, glossophallus parisellei Jainus iocensis n....

Two new species of Dactylogyridae (Monogenoidea) found parasitizing the gills pacu, Piaractus mesopotamicus (Holmberg, 1887), are described: Anacanthorus toledoensis n. sp. and Mymarothecium ianwhittingtoni These monogenoideans were collected in all 38 pacus reared cages Toledo, State Paraná, Brazil. is characterized by slightly sigmoid male copulatory organ (MCO) with a membranous flap along longitudinal axis, which ends at distal, spatulated portion organ, rod-shaped accessory piece...

Eight known species of Demidospermus (Dactylogyridae, Monogenea) were collected from siluriform fishes reservoir the Itaipu Hydroelectric Power Station, Paraná, Brazil. Four them are recorded for first time in Brazil, enlarging their geographical distribution: armostus, anus, bidiverticulatum and valenciennesi. labrosi is synonymized with cornicinus mandi leptosynophallus reported two new hosts. paravalenciennesi uncusvalidus also collected.

A list of 135 monogenean species is presented updating the papers published by Kohn & Cohen (1989) and Paiva (2000), increasing to 658 number known in South America. After 1997, 104 monogeneans had been described as new species: 65 from Brazil, 13 Argentina, 10 Venezuela, 04 Chile, two Guyana, one French Peru Uruguay each. Some originally same publication more than country: Brazil Peru, Argentina Uruguay. More 31 reported for first time America: 02 24 Colombia Chile Surinam Peru. It was...

Pseudorhabdosynochus jeanloui n. sp. (Monogenoidea, Diplectanidae) is described from specimens collected the gills of Pacific creolefish, Paranthias colonus (Perciformes, Serranidae) a fish market in Chorrillos, Lima, Peru. The new species differentiated other members genus by structure its sclerotized vagina, which has two spherical chambers similar diameter. This first coast America, third reported South America and member Paranthias.

Six species of dactylogyrid monogenoideans were collected at the upper São Francisco River, State Minas Gerais, Brazil, from gills Salminus franciscanus. Anacanthorus adkruidenieri sp. n. and paradouradensis are described compared with other Anacanthorus. is more similar to A. kruidenieri parakruidenieri, but it can be distinguished both by rod-shaped accessory piece, which articulated base male copulatory organ coiled around it, shank hook, expanded proximal bulbous portion bearing a...

During a survey of the helminth fauna characiform fishes from Tocantins River, Brazil, 185 fish specimens 22 species were studied. Twelve Nematoda and nine Digenea collected. Some these reported for first time in their hosts, thus representing new host records: Procamallanus (Spirocamallanus) sp. Bivibranchia notata, Brycon pesu, Chalceus macrolepidotus, Hemiodus microlepis unimaculatus; inopinatus Triportheus elongatus; Goezia (larva) Boulengerella cuvieri; Rhabdochona acuminata pesu...

Fifty four specimens of marine fish belonging to seven species collected from the coast State Rio de Janeiro, Brazil were examined for helminths, and results relating Monogenea Digenea are presented. The monogeneans Metamicrocotyla macracantha, Microcotyle pomatomi Gotocotyla acanthura reported in new hosts. digeneans Parahemiurus merus, Lecithochirium microstomum, Gonocercella pacifica, Aponurus laguncula, Gonocerca trematomi Lampritrema miescheri hosts, latter two also first time Brazil.

The objective of the present study was to analyze seasonality parasitic helminths Leporinus macrocephalus from fish farms in municipality Cruzeiro do Sul, Acre, Brazil, and their parasitism rates. Between June 2014 March 2015, 200 specimens were sampled two farms: one with a semi-intensive system other an extensive (100 each farm: 50 during dry season rainy season). Fifteen species parasites found, seasonal variations some according farming system. In farm, there greater prevalence infection...

Three new species of Urocleidoides Mizelle & Price, 1964 are described from the gills characiform fishes in Tocantins River and its tributaries. boulengerellae sp. nov. is Boulengerella cuvieri (Spix Agassiz, 1829) differs all congeners by dorsal bar with a long posteromedial projection; male copulatory organ 2–3 counterclockwise rings base flange; an accessory piece comprising robust Y-shaped unit sheath-like unit; highly sclerotized vaginal canal. paratriangulus nov., Psectrogaster...

ABSTRACT In the Amazon, growing demand for fish has been boosting expansion of farms. However, intensification cultivation can generate disequilibrium in parasite-host environment, predisposing to parasitic infections. The objective this study was evaluate community structure metazoan parasites systems piauçu, Leporinus macrocephalus, state Acre, Brazil. We examined 100 specimens from a semi-intensive system (earth tanks) and an extensive (dams). Overall 66.5% hosts were parasitized....

The surface topography and ultrastructure of the tegument Paranaella luquei Kohn, Baptista-Farias & Cohen, 2000, a microcotylid monogenean parasite from gills Hypostomus regani (Ihering, 1905) (Loricariidae) was studied by scanning (SEM) transmission electron microscopy (TEM). By SEM, it observed that presents transversal ridges, forming folds in ventral dorsal surfaces microvillous-like tegumental projections anterior median regions body. These were also TEM. is made up syncytium delimited...

This study investigated the occurrence, prevalence, mean abundance and intensity of monogenoidean parasites in Piaractus mesopotamicus farmed cages reservoir Itaipu Hydroelectric Power Station, Paraná River, Brazil. The parasite distribution pattern correlation prevalence with total length hosts were also investigated. Four species collected: Anacanthorus penilabiatus, A. toledoensis, Mymarothecium ianwhitingtoni M. viatorum. All collected P. showed typical aggregated pattern, did not shown...