Neotropical Monogenoidea 62. Biotodomella mirospinata gen. nov., sp. nov. (Polyonchoinea: Dactylogyridae): a parasite of the gills of Biotodoma cupido (Cichliformes: Cichlidae), from the Peruvian Amazon

Biotodomella gen. nov. (Monogenoidea: Dactylogyridae) is proposed to accommodate Biotodomella mirospinata sp. nov., found on the gills of Biotodoma cupido (Heckel, 1840) (“cara bonita” or “green-streaked eartheater”), a freshwater cichlid from the Peruvian Amazon. The new genus and species differ from other Neotropical dactylogyrids in having the hooks of each hook pair well-differentiated from the remaining pairs, shafts varying in robustness, weakly sclerotized expansions at the proximal end of shaft, and a dorsal anchor with grooved shaft, bifid point. This study represents the first record of a monogenoid from a species of Biotodoma Eigenmann & Kennedy, 1903.

Neotropical Monogenoidea 62. Biotodomella mirospinata gen. nov., sp. nov. (Polyonchoinea: Dactylogyridae): a parasite of the gills of Biotodoma cupido (Cichliformes: Cichlidae), from the Peruvian Amazon

Biotodomella gen. nov. (Monogenoidea: Dactylogyridae) is proposed to accommodate Biotodomella mirospinata sp. nov., found on the gills of Biotodoma cupido (Heckel, 1840) (“cara bonita” or “green-streaked eartheater”), a freshwater cichlid from the Peruvian Amazon. The new genus and species differ from other Neotropical dactylogyrids in having the hooks of each hook pair well-differentiated from the remaining pairs, shafts varying in robustness, weakly sclerotized expansions at the proximal end of shaft, and a dorsal anchor with grooved shaft, bifid point. This study represents the first record of a monogenoid from a species of Biotodoma Eigenmann & Kennedy, 1903.(AU)

A new species of Diaphorocleidus (Monogenea: Ancyrocephalinae) from the gills of Argonectes robertsi (Characiformes) and new records of dactylogyrids parasitic on fishes from the Xingu River, Amazon Basin, Brazil

Diaphorocleidus altamirensis sp. nov., parasitic on the gills of Argonectes robertsi Langeani, 1999 from the Xingu River, northern Brazil, is described. The new species differs from its six congeners by the morphology of the male copulatory organ (which comprises a coil of six rings), by the midventral vagina, and by the presence of only one pair of eyespots. It is the first species of Diaphorocleidus Jogunoori, Kritsky & Venkatanarasaiah, 2004 described from hemiodontid fishes. In addition, new host and geographical records of seven species of dactylogyrids found on fish from the Xingu River are reported.

A new species of Diaphorocleidus (Monogenea: Ancyrocephalinae) from the gills of Argonectes robertsi (Characiformes) and new records of dactylogyrids parasitic on fishes from the Xingu River, Amazon Basin, Brazil

Diaphorocleidus altamirensis sp. nov., parasitic on the gills of Argonectes robertsi Langeani, 1999 from the Xingu River, northern Brazil, is described. The new species differs from its six congeners by the morphology of the male copulatory organ (which comprises a coil of six rings), by the midventral vagina, and by the presence of only one pair of eyespots. It is the first species of Diaphorocleidus Jogunoori, Kritsky & Venkatanarasaiah, 2004 described from hemiodontid fishes. In addition, new host and geographical records of seven species of dactylogyrids found on fish from the Xingu River are reported.(AU)

New species of Tereancistrum (Dactylogyridae) monogenean parasites of Schizodon borellii (Characiformes, Anostomidae) from Brazil, and emended diagnosis for T. parvus / Nova espécie de Tereancistrum (Dactylogyridae) monogenea parasita de Schizodon borellii (Characiformes, Anostomidae) do Brasil, com emenda da diagnose de T. parvus

Tereancistrum paranaensis sp. n. is described from the gills of Schizodon borellii (Boulenger 1900) (Characiformes) from the upper Paraná river floodplain, Brazil. The new species is mainly characterized by morphology of copulatory complex, dorsal anchor with shaft recurved and pointed and arc-shaped dorsal bar. Tereancistrum parvus was described based on only one specimen and some characteristics were not observed. Now we provide an emendation to the diagnosis of this species.(AU)

Tereancistrum paranaensis sp. n. é descrito de brânquias de Schizodon borellii (Boulenger 1900) (Characiformes) da planície de inundação do alto rio Paraná, Brasil. A nova espécie é caracterizada principalmente pela morfologia do complexo copulatório, âncora dorsal com lâmina curvada e pontiaguda e barra dorsal em forma de arco. Tereancistrum parvus foi descrito baseado em somente um espécime e não foram observadas algumas características. Neste estudo, além da descrição de uma espécie, uma emenda na diagnose de T. parvus é apresentada. (AU)

Gill parasites of Prochilodus lineatus (Valenciennes, 1836) (Pisces; Curimatidae; Prochilodontinae) in the Middle Paraná System (Argentina)

We studied gill parasites of Prochilodus lineatus in the San Javier River, which is connected to the Middle Paraná System (Santa Fe, Argentina). In 25 specimens, the parasite prevalence in branchial organs was 92% and the average intensity was 8.3 parasites/infested fish. The parasite community showed no dominance of any taxon, but the family Dactylogyridae represented 60% of the community. We found a significant association between Tereancistrum curimba and Dactylogyridae specimens. The prevalence of the parasites T. toksonum and T. curimba was higher than what has been recorded in the floodplain of the Upper Paraná River, Brazil, demonstrating that the geographic distribution of parasites belonging to Tereancistrum genus is thus expandeing.

Foram estudados os parasitos das brânquias de Prochilodus lineatus, do rio San Javier, Sistema Paraná Médio (Santa Fe, Argentina). Em 25 espécimes de peixes analisados, a prevalência de parasitos foi de 92% e a intensidade média de 8,3 parasitos/peixe parasitado. A comunidade parasitária não mostrou predomínio de um taxón, embora tenha sido observado que 60% da comunidade foi representada pela Família Dactylogyridae. Verificou-se associação significativa entre Tereancistrum curimba e indivíduos da família Dactylogyridae. Os índices de prevalência parasitária de T. toksonum e T. curimba se destacam como sendo superiores aos registrados na planície de inundação do rio Alto Paraná, no Brasil, demonstrando desta maneira expansão da distribuição geográfica de parasitas do gênero Tereancistrum.

Dactylogyrids (Monogenoidea: Polyonchoinea) parasitizing the gills of snappers (Perciformes: Lutjanidae): revision of Euryhaliotrema with new and previously described species from the Red Sea, Persian Gulf, the eastern and Indo-west Pacific Ocean, and the Gulf of Mexico

Twenty one of 29 species of snappers (Lutjanidae), examined for dactylogyrids (Monogenoidea) from the Red Sea, Persian Gulf, the Indo-west and eastern Pacific Ocean, the Gulf of Mexico, and Caribbean Sea were parasitized by 16 new and 11 previously described species of Euryhaliotrema: Euryhaliotrema adelpha sp. nov., Euryhaliotrema anecorhizion sp. nov., Euryhaliotrema cardinale sp. nov., Euryhaliotrema chrysotaeniae, Euryhaliotrema cognatus sp. nov., Euryhaliotrema cryptophallus sp. nov., Euryhaliotrema diplops sp. nov., Euryhaliotrema distinctum sp. nov., Euryhaliotrema fajeravilae sp. nov., Euryhaliotrema fastigatum, Euryhaliotrema fatuum sp. nov., Euryhaliotrema ferocis sp. nov., Euryhaliotrema hainanense, Euryhaliotrema longibaculum, Euryhaliotrema mehen comb. nov., Euryhaliotrema paracanthi, Euryhaliotrema paululum sp. nov., Euryhaliotrema perezponcei, Euryhaliotrema ramulum sp. nov., Euryhaliotrema seyi sp. nov., Euryhaliotrema simplicis sp. nov., Euryhaliotrema spirotubiforum, Euryhaliotrema tormocleithrum sp. nov., Euryhaliotrema torquecirrus, Euryhaliotrema tubocirrus, Euryhaliotrema xinyingense, and Euryhaliotrema youngi sp. nov. Six species of Euryhaliotrema, previously reported from lutjanid hosts, were not collected: Euryhaliotrema anguiformis comb. nov., Euryhaliotrema guangdongense, Euryhaliotrema johni, Euryhaliotrema lutiani, Euryhaliotrema lutjani, and Euryhaliotrema nanaoense comb. nov. The diagnosis of Euryhaliotrema was emended to include species having tandem or slightly overlapping gonads, a pretesticular germarium, a globose haptor with morphologically similar anchors and hooks, a coiled or meandering male copulatory organ, a dextral vaginal pore, and hooks with upright acute thumbs and slender shanks comprised of one subunit. A bulbous base of the MCO and presence of an accessory piece in the copulatory complex were no longer considered features defining the genus. As a result, Euryhaliotrematoides and Aliatrema were placed in subjective synonymy with Euryhaliotrema, and the following transfers were proposed: Euryhaliotrema annulocirrus comb. nov., Euryhaliotrema aspistis comb. nov., Euryhaliotrema berenguelae comb. nov., Euryhaliotrema cribbi comb. nov., Euryhaliotrema grandis comb. nov., Euryhaliotrema mehen comb. nov., Euryhaliotrema microphallus comb. nov., Euryhaliotrema pirulum comb. nov., and Euryhaliotrema triangulovagina comb. nov. In addition, the following new combinations were proposed based on the revised diagnosis of the genus: Euryhaliotrema anguiformis comb. nov., Euryhaliotrema eukurodai comb. nov., Euryhaliotrema kurodai comb. nov., Euryhaliotrema monoporosum comb. nov., and Euryhaliotrema nanaoense comb. nov. The dactylogyrids, Protancyrocephalus rangusi (from a lutjanid host) and Daitreosoma chaetodontis (from a chaetodontid host), were considered species inquirendae. Haliotrematoides tukerhamatus comb. nov. is considered the senior subjective synonym of Haliotrematoides nagabinae. New host records for some previously described species of Euryhaliotrema from lutjanid and chaetodontid hosts were reported.

Dactylogyrids (Monogenoidea: Polyonchoinea) parasitizing the gills of snappers (Perciformes: Lutjanidae): revision of Euryhaliotrema with new and previously described species from the Red Sea, Persian Gulf, the eastern and Indo-west Pacific Ocean, and the Gulf of Mexico

Twenty one of 29 species of snappers (Lutjanidae), examined for dactylogyrids (Monogenoidea) from the Red Sea, Persian Gulf, the Indo-west and eastern Pacific Ocean, the Gulf of Mexico, and Caribbean Sea were parasitized by 16 new and 11 previously described species of Euryhaliotrema: Euryhaliotrema adelpha sp. nov., Euryhaliotrema anecorhizion sp. nov., Euryhaliotrema cardinale sp. nov., Euryhaliotrema chrysotaeniae, Euryhaliotrema cognatus sp. nov., Euryhaliotrema cryptophallus sp. nov., Euryhaliotrema diplops sp. nov., Euryhaliotrema distinctum sp. nov., Euryhaliotrema fajeravilae sp. nov., Euryhaliotrema fastigatum, Euryhaliotrema fatuum sp. nov., Euryhaliotrema ferocis sp. nov., Euryhaliotrema hainanense, Euryhaliotrema longibaculum, Euryhaliotrema mehen comb. nov., Euryhaliotrema paracanthi, Euryhaliotrema paululum sp. nov., Euryhaliotrema perezponcei, Euryhaliotrema ramulum sp. nov., Euryhaliotrema seyi sp. nov., Euryhaliotrema simplicis sp. nov., Euryhaliotrema spirotubiforum, Euryhaliotrema tormocleithrum sp. nov., Euryhaliotrema torquecirrus, Euryhaliotrema tubocirrus, Euryhaliotrema xinyingense, and Euryhaliotrema youngi sp. nov. Six species of Euryhaliotrema, previously reported from lutjanid hosts, were not collected: Euryhaliotrema anguiformis comb. nov., Euryhaliotrema guangdongense, Euryhaliotrema johni, Euryhaliotrema lutiani, Euryhaliotrema lutjani, and Euryhaliotrema nanaoense comb. nov. The diagnosis of Euryhaliotrema was emended to include species having tandem or slightly overlapping gonads, a pretesticular germarium, a globose haptor with morphologically similar anchors and hooks, a coiled or meandering male copulatory organ, a dextral vaginal pore, and hooks with upright acute thumbs and slender shanks comprised of one subunit. A bulbous base of the MCO and presence of an accessory piece in the copulatory complex were no longer considered features defining the genus. As a result, Euryhaliotrematoides and Aliatrema were placed in subjective synonymy with Euryhaliotrema, and the following transfers were proposed: Euryhaliotrema annulocirrus comb. nov., Euryhaliotrema aspistis comb. nov., Euryhaliotrema berenguelae comb. nov., Euryhaliotrema cribbi comb. nov., Euryhaliotrema grandis comb. nov., Euryhaliotrema mehen comb. nov., Euryhaliotrema microphallus comb. nov., Euryhaliotrema pirulum comb. nov., and Euryhaliotrema triangulovagina comb. nov. In addition, the following new combinations were proposed based on the revised diagnosis of the genus: Euryhaliotrema anguiformis comb. nov., Euryhaliotrema eukurodai comb. nov., Euryhaliotrema kurodai comb. nov., Euryhaliotrema monoporosum comb. nov., and Euryhaliotrema nanaoense comb. nov. The dactylogyrids, Protancyrocephalus rangusi (from a lutjanid host) and Daitreosoma chaetodontis (from a chaetodontid host), were considered species inquirendae. Haliotrematoides tukerhamatus comb. nov. is considered the senior subjective synonym of Haliotrematoides nagabinae. New host records for some previously described species of Euryhaliotrema from lutjanid and chaetodontid hosts were reported.

Dactylogyrids (Monogenoidea: Polyonchoinea) parasitizing the gills of snappers (Perciformes: Lutjanidae): revision of Euryhaliotrema with new and previously described species from the Red Sea, Persian Gulf, the eastern and Indo-west Pacific Ocean, and the Gulf of Mexico

Twenty one of 29 species of snappers (Lutjanidae), examined for dactylogyrids (Monogenoidea) from the Red Sea, Persian Gulf, the Indo-west and eastern Pacific Ocean, the Gulf of Mexico, and Caribbean Sea were parasitized by 16 new and 11 previously described species of Euryhaliotrema: Euryhaliotrema adelpha sp. nov., Euryhaliotrema anecorhizion sp. nov., Euryhaliotrema cardinale sp. nov., Euryhaliotrema chrysotaeniae, Euryhaliotrema cognatus sp. nov., Euryhaliotrema cryptophallus sp. nov., Euryhaliotrema diplops sp. nov., Euryhaliotrema distinctum sp. nov., Euryhaliotrema fajeravilae sp. nov., Euryhaliotrema fastigatum, Euryhaliotrema fatuum sp. nov., Euryhaliotrema ferocis sp. nov., Euryhaliotrema hainanense, Euryhaliotrema longibaculum, Euryhaliotrema mehen comb. nov., Euryhaliotrema paracanthi, Euryhaliotrema paululum sp. nov., Euryhaliotrema perezponcei, Euryhaliotrema ramulum sp. nov., Euryhaliotrema seyi sp. nov., Euryhaliotrema simplicis sp. nov., Euryhaliotrema spirotubiforum, Euryhaliotrema tormocleithrum sp. nov., Euryhaliotrema torquecirrus, Euryhaliotrema tubocirrus, Euryhaliotrema xinyingense, and Euryhaliotrema youngi sp. nov. Six species of Euryhaliotrema, previously reported from lutjanid hosts, were not collected: Euryhaliotrema anguiformis comb. nov., Euryhaliotrema guangdongense, Euryhaliotrema johni, Euryhaliotrema lutiani, Euryhaliotrema lutjani, and Euryhaliotrema nanaoense comb. nov. The diagnosis of Euryhaliotrema was emended to include species having tandem or slightly overlapping gonads, a pretesticular germarium, a globose haptor with morphologically similar anchors and hooks, a coiled or meandering male copulatory organ, a dextral vaginal pore, and hooks with upright acute thumbs and slender shanks comprised of one subunit. A bulbous base of the MCO and presence of an accessory piece in the copulatory complex were no longer considered features defining the genus. As a result, Euryhaliotrematoides and Aliatrema were placed in subjective synonymy with Euryhaliotrema, and the following transfers were proposed: Euryhaliotrema annulocirrus comb. nov., Euryhaliotrema aspistis comb. nov., Euryhaliotrema berenguelae comb. nov., Euryhaliotrema cribbi comb. nov., Euryhaliotrema grandis comb. nov., Euryhaliotrema mehen comb. nov., Euryhaliotrema microphallus comb. nov., Euryhaliotrema pirulum comb. nov., and Euryhaliotrema triangulovagina comb. nov. In addition, the following new combinations were proposed based on the revised diagnosis of the genus: Euryhaliotrema anguiformis comb. nov., Euryhaliotrema eukurodai comb. nov., Euryhaliotrema kurodai comb. nov., Euryhaliotrema monoporosum comb. nov., and Euryhaliotrema nanaoense comb. nov. The dactylogyrids, Protancyrocephalus rangusi (from a lutjanid host) and Daitreosoma chaetodontis (from a chaetodontid host), were considered species inquirendae. Haliotrematoides tukerhamatus comb. nov. is considered the senior subjective synonym of Haliotrematoides nagabinae. New host records for some previously described species of Euryhaliotrema from lutjanid and chaetodontid hosts were reported.

A new species of Jainus ( Monogenea ), gill parasite of Schizodonborellii ( Characiformes, Anostomidae ) from the upper Paraná river floodplain, Brazil / Uma nova espécie de Jainus (Monogenea), parasito de brânquias de Schizodon borellii (Characiformes, Anostomidae) da planície de inundação do alto rio Paraná, Brasil

Jainus piava n. sp. is described from the gills of Schizodon borellii (Boulenger, 1900) (Characiform), commonly named as piava from the upper Paraná River floodplain, Brazil. The new species differs from the other members of Jainus in the following features: ventral bar thin broadly V-shaped and male copulatory organ (MCO) a coil of about 1.5 rings. Jainus piava n. sp. is similar to species of Jainus by having a ventral anchor base with flattened superficial root and elongate rodlike deep root.(AU)

Jainus piava sp. nov é descrito para brânquias de Schizodon borellii (Boulenger, 1900) (Chacariformes) comumente chamado de piava na planície de inundação do alto rio Paraná, Brasil. A nova espécie difere de outros membros de Jainus pelas seguintes características: barra ventral fina levemente em forma de V e órgão copulatório masculino (MCO) com cerca de uma volta e meia de diâmetro do anel. Jainus piava sp. nov é similar a outras espécies do gênero Jainus por ter a âncora ventral com uma raiz superficial com extensão alongada.(AU)

Apedunculata discoidea gen. n., sp. n. (Monogenea: Dactylogyridae) parasitic on Prochilodus lineatus (Valenciennes, 1837) (Characiformes: Prochilodontidae) from southeastern Brazil

A new species of dactylogyrid monogenean, Apedunculata discoidea gen. n., sp. n. is described and illustrated from the gills of the freshwater fish Prochilodus lineatus (Valenciennes, 1837) in pisciculture ponds from Pirassununga, São Paulo, Brazil. Diagnostic characters of the new genus and species are: 1) vagina dextrolateral slightly sclerotised, opening anteriorly at level of copulatory complex; 2) copulatory organ coiled with two counterclockwise rings; 3) Accessory piece distal and not articulated; 4) body disk-shaped, lacking a peduncle.

Uma espécie nova de monogenético dactilogirídeo, Apedunculata discoidea gen. n., sp. n. parasita das brânquias do peixe de água doce Prochilodus lineatus (Valenciennes, 1837) proveniente de pisciculturas de Pirassununga, São Paulo, Brasil, é descrita e ilustrada. As características diagnósticas do novo gênero e da nova espécie são: 1) vagina dextrolateral levemente esclerotizada, com abertura ao nível do complexo copulatório; 2) órgão copulatório em espiral com duas voltas no sentido anti-horário; 3) peça acessória distal e não articulada; 4) corpo com formato de disco e sem pedúnculo.

Monogenéticos (Platyhelminthes: Dactylogyridae) parasitos de peixes characiformes dos rios Mogi-Guaçu (SP), Cuiabá (MT) e Araguaia (MT), Brasil

Durante pesquisas realizadas nos Rios Mogi Guaçu (Sudeste), Cuiabá e Araguaia (Centro-Oeste), as espécies Salminus brasiliensis (Cuvier, 1816), Astyanax altiparanae Garutti e Britski, 2000, A. fasciatus (Cuvier, 1819), A. bimaculatus (Linnaeus, 1758), Prochilodus lineatus (Valenciennes, 1837) e P. nigricans Spix e Agassiz, 1829 foram estudadas para detecção e estudo taxonômico de Monogenéticos. Parasitando os hospedeiros estudados foram encontradas as espécies novas Annulotrematoides n. sp., Jainus n. sp., Kritskyia salmini Cepeda, Ceccarelli e Luque, 2011 (espécie já publicada) e Tereancistrum n. sp. Também foram registradas as espécies Anacanthorus douradensis Cohen, Kohn e Boeger, 2012, Anacanthorus daulometrus Cohen, Kohn e Boeger, 2012, Anacanthorus contortus Cohen, Kohn e Boeger, 2012, Anacanthorus parakruidenieri Cohen, Kohn e Boeger, 2012, Rhinoxenus bulbovaginatus Boeger, Domingues e Pavanelli, 1995, Diaphorocleidus kabatai (Molnar, Hanek e Fernando, 1974) Jogunoori, Kritsky e Venkatanarasaiah, 2004, Diaphorocleidus trinidadensis (Molnar, Hanek e Fernando, 1974) n. comb., Characithecium costaricensis (Price e Bussing, 1967) Mendoza-Franco, Reina e Torchin 2009, Jainus hexops Kritsky e Leiby, 1972, Kritskyia boegeri Takemoto, Lizama e Pavanelli, 2002, Kritskyia salmini Cepeda, Ceccarelli e Luque, 2011, Rhinonastes pseudocapsaloideum Kritsky, Thatcher e Boeger, 1998. Algumas espécies apresentaram um ou poucos espécimes: Anacanthorus sp. 1, Anacanthorus sp. 2, Annulotrematoides sp., Diaphorocleidus sp. 1, Diaphorocleidus sp. 2, Dactylogyridae gen. sp., Apedunculata sp., Tereancistrum sp. 1, Tereancistrum sp. 2, Tereancistrum sp. 3, Urocleidoides sp. 1, Urocleidoides sp. 2, Urocleidoides sp. 3, Telethecium sp. A descrição formal destas espécies está condicionada a análise de mais material. As espécies novas foram descritas, medidas e observações foram dadas para espécies previamente registradas. Os resultados do presente estudo contribuem para o melhor conhecimento do grupo e de sua distribuição geográfica

Monogenéticos (Platyhelminthes: Dactylogyridae) parasitos de peixes characiformes dos rios Mogi-Guaçu (SP), Cuiabá (MT) e Araguaia (MT), Brasil

Durante pesquisas realizadas nos Rios Mogi Guaçu (Sudeste), Cuiabá e Araguaia (Centro-Oeste), as espécies Salminus brasiliensis (Cuvier, 1816), Astyanax altiparanae Garutti e Britski, 2000, A. fasciatus (Cuvier, 1819), A. bimaculatus (Linnaeus, 1758), Prochilodus lineatus (Valenciennes, 1837) e P. nigricans Spix e Agassiz, 1829 foram estudadas para detecção e estudo taxonômico de Monogenéticos. Parasitando os hospedeiros estudados foram encontradas as espécies novas Annulotrematoides n. sp., Jainus n. sp., Kritskyia salmini Cepeda, Ceccarelli e Luque, 2011 (espécie já publicada) e Tereancistrum n. sp. Também foram registradas as espécies Anacanthorus douradensis Cohen, Kohn e Boeger, 2012, Anacanthorus daulometrus Cohen, Kohn e Boeger, 2012, Anacanthorus contortus Cohen, Kohn e Boeger, 2012, Anacanthorus parakruidenieri Cohen, Kohn e Boeger, 2012, Rhinoxenus bulbovaginatus Boeger, Domingues e Pavanelli, 1995, Diaphorocleidus kabatai (Molnar, Hanek e Fernando, 1974) Jogunoori, Kritsky e Venkatanarasaiah, 2004, Diaphorocleidus trinidadensis (Molnar, Hanek e Fernando, 1974) n. comb., Characithecium costaricensis (Price e Bussing, 1967) Mendoza-Franco, Reina e Torchin 2009, Jainus hexops Kritsky e Leiby, 1972, Kritskyia boegeri Takemoto, Lizama e Pavanelli, 2002, Kritskyia salmini Cepeda, Ceccarelli e Luque, 2011, Rhinonastes pseudocapsaloideum Kritsky, Thatcher e Boeger, 1998. Algumas espécies apresentaram um ou poucos espécimes: Anacanthorus sp. 1, Anacanthorus sp. 2, Annulotrematoides sp., Diaphorocleidus sp. 1, Diaphorocleidus sp. 2, Dactylogyridae gen. sp., Apedunculata sp., Tereancistrum sp. 1, Tereancistrum sp. 2, Tereancistrum sp. 3, Urocleidoides sp. 1, Urocleidoides sp. 2, Urocleidoides sp. 3, Telethecium sp. A descrição formal destas espécies está condicionada a análise de mais material. As espécies novas foram descritas, medidas e observações foram dadas para espécies previamente registradas. Os resultados do presente estudo contribuem para o melhor conhecimento do grupo e de sua distribuição geográfica(AU)

A importância da utilização da técnica rapd para a identificação de dactilogirídeos em tilápias do nilo (Oreochromis Niloticus) / The importance of the use of rapd technique for the indentification of dactylogyridae in nile tilapia (Oreochromis Niloticus) / Importancia de la utilización de la técnica rapd para la identificación de dactilogirídeos en tilapias del nilo (Oreochromis niloticus)

A aqüicultura é atualmente uma importante fonte de proteína animal em várias regiões do mundo. A tilápia é mais resistente às doenças bacterianas, parasitárias e viróticas do que a maioria dos peixes cultivados. No entanto a ocorrência de parasitoses pode preocupar, principalmente sob condições de estresse e altas densidades de cultivo. Os platelmintos da classe Monogenea estão entre os principais ectoparasitas de água doce. A identificação das espécies de monogenéticos em peixes está baseada, principalmente, em aspectos morfológicos. Atualmente, a Biologia Molecular desempenha um importante papel em estudos ligados à sistemática e filogenia. A técnica por RAPD pode desempenhar um papel importante nesse sentido. A correta identificação dos parasitas é fundamental para sua melhor sistematização e compreensão das relações filogenéticas, o que pode ser relevante na separação de organismos próximos. A clara distinção entre espécies ou cepas pode ser fundamental para a identificação de diferentes características bioquímicas, ecológicas, etológicas, padrões de dispersão, patogenia, resistência a medicamentos, dentre outras. O caminho mais plausível a ser seguido parece ser a somatória dos enfoques morfológico com o refinamento das análises, por meio de métodos moleculares.(AU)

The aquaculture is currently an important source of animal protein in several areas of the world. The tilapia is more resistant to the bacterial, parasitic, and viral diseases than most of the farm-raised fish. However, parasitizes occurrence may worry, mainly under stress conditions and high cultivation densities. The platyhelminthes of the Monogenean class are among the main ectoparasites of freshwater. The identification of the monogenic species in fish is mainly based on morphological aspects. Nowadays, the molecular biology plays an important role in studies related to both systematic and phylogeny. The RAPD technique may support this important role, as well. The correct identification of the parasites is fundamental for the better systemization and understanding of the phylogenetic relationships, which can be relevant to the separation of close organisms. The clear distinction among the species or strains can be fundamental for the identification of different biochemical, ecological, and ethological characteristics, as well as for the dispersion patterns, pathogen, and the resistance to medicines, among others. The most plausible way to proceed seems to be the effort of the morphologic focuses together with the refinement of the analyses by molecular methods.(AU)

Actualmente la acuicultura es una importante fuente de proteína animal en varias regiones del mundo. La tilapia es más resistente a las enfermedades bacterianas, parasitárias y viróticas que la mayoría de los peces cultivados. Sin embargo, la incidencia de parasitosis puede preocupar, principalmente en condiciones de estrés y con altas densidades de cultivo. Los platelmintos de la clase Monogenea se encuentran entre los principales ectoparásitos de agua dulce. La identificación de las espécies de monogenéticos en peces se basa, principalmente, en aspectos morfológicos. Actualmente, la biologia molecular tiene un papel importante en estudios sobre sistemática y filogenía. La técnica RAPD puede representar un importante papel, en este sentido. La correcta identificación de los parásitos es fundamental para una mejor sistematización y comprensión de las relaciones filogenéticas, lo que puede ser importante en la separación de organismos próximos. La clara distinción entre espécies o cepas puede ser fundamental para la identificación de diferentes características bioquímicas, ecológicas, etológicas, padrones de dispersión, patogenía, resistencia a medicamentos, entre otras. El camino más lógico a seguir parece ser la suma de los enfoques morfológicos con la precisión de los análisis, por médio de métodos moleculares.(AU)