Effect of flood pulses on the trophic ecology of four piscivorous fishes from the eastern Amazon.

This study investigated the effect of hydrological periods on the feeding activity and trophic interactions of four piscivorous fishes from the middle Xingu River, Brazil: pike-characid Boulengerella cuvieri, dogtooth characin Hydrolycus armatus, dogtooth characin Hydrolycus tatauaia and South American silver croaker Plagioscion squamosissimus. Repletion Index (IR %), Alimentary Index (IAi %) and food web properties were calculated for each species. A total of 825 specimens were collected. The IR showed changes in feeding intensity of B. cuvieri, H. armatus and H. tatauaia among hydrological periods. Flood pulse showed no influence on composition and importance of food items consumed. Trophic connections showed that connectivity ranged from 0.025 to 0.038. The highest number of trophic connections (75) occurred in the high-water period, when 51 food items were recorded and the lowest number of trophic connections (43) occurred in receding water, with 31 food items. In all food webs, over 45% of food items were consumed by only one species (ultra-peripheral items), which is common in piscivorous fishes.

Two New Species and New Records of Sepsidae from the Brazilian Amazon.

The dipteran fauna from the Brazilian Amazon remains poorly known, including that of forensic interest, such as the Sepsidae. The sepsid fauna of two secondary forests in the eastern Amazon was surveyed utilizing rotting bovine lung and feces (humans, bovines, and monkeys). We obtained 17 sespid species in six genera, most of them on bovine dung and rotting bovine lung. Two new species are described herein: Archisepsis bosque sp. nov. and Archisepsis verae sp. nov. The genus Palaeosepsis Duda, 1926 and the species Archisepsis polychaeta (Ozerov, 1993), Archisepsis diversiformis (Ozerov, 1993), Microsepsis mitis (Curran, 1927), Meropliosepsis sexsetosa Duda, 1926, and Palaeosepsis cf. golovastikOzerov, 2004 are newly recorded from the Brazilian Amazon.

[A new species of Bricelochlorops Paganelli and the first record of Urubambina rufa (Duda) (Diptera: Chloropidae) from Brazil]. / Uma nova espécie de Bricelochlorops Paganelli e o Primeiro Registro de Urubambina rufa (Duda) (Diptera: Chloropidae) para o Brasil.

The subfamily Chloropinae comprises about 442 described species, with only one species recorded from the Brazilian Amazon. The genus Bricelochlorops Paganelli was represented by a unique species from Rio de Janeiro, Brazil. The species Urubambina rufa (Duda) is the only species of the genus Urubambina Paganelli and has been recorded only from Peru. A new species of Bricelochlorops, B. celutae sp. nov., is described here and Urubambina rufa is recorded for the first time in Brazil. Both species were collected in the state of Acre. A key to species of Bricelochlorops is provided.

Neriidae (Diptera: Schizophora) of the Brazilian Amazon: new records of genera and species, and key to species.

The present study brings together survey data from collection in several localities in the Brazilian Amazon and specimens from the Entomological Collection of Museu Paraense Emílio Goeldi (MPEG-Belém). The flies were collected over organic decomposing matter (bananas and bovine meat) baits. The genus Odontoloxozus Enderlein, with the species Odontoloxozus peruanus Hennig, is recorded from Brazil for the first time. The species Glyphidops (Glyphidops) flavipes (Widemann), G. (Oncopsia) flavifrons (Bigot), G.(O.) durus (Cresson) and G. (O.) dipsar (Hennig) are new occurrences for Brazil. The species G. (O.)carrerai Aczél and N. plurivittatus Bigot are new occurrences from Brazilian Amazon. A key to Brazilian Amazon species is provided.

First record of Chrysomya rufifacies (Macquart) (Diptera, Calliphoridae) from Brazil

First record of Chrysomya rufifacies (Macquart) (Diptera, Calliphoridae) from Brazil. In addition to its native fauna, the Neotropical region is known to be inhabited by four introduced species of blow flies of the genus Chrysomya. Up until now, only three of these species have been recorded in Brazil - Chrysomya albiceps (Wiedemann), Chrysomya megacephala (Fabricius), and Chrysomya putoria (Wiedemann). In South America, C. rufifacies (Macquart) has only been reported from Argentina and Colombia. This study records C. rufifacies from Brazil for the first time. The specimens were collected in an area of cerrado (savanna-like vegetation) in the municipality of Caxias in state of Maranhão, and were attracted by pig carcasses.

Primeiro registro de Chrysomya rufifacies (Macquart) (Diptera, Calliphoridae) para o Brasil. A região Neotropical compreende além da fauna nativa, quatro espécies de moscas varejeiras exóticas do gênero Chrysomya. No Brasil, até o momento, foram registradas três espécies desse gênero: Chrysomya albiceps (Wiedemann), Chrysomya megacephala (Fabricius), e Chrysomya putoria (Wiedemann). C. rufifacies (Macquart), na América do Sul, foi registrada somente para a Argentina e Colômbia. Neste estudo, C. rufifacies é registrada pela primeira vez para o Brasil. Os espécimes foram coletados em uma região de cerrado, no município de Caxias, estado do Maranhão, atraídos por carcaças de porcos.

Uma nova espécie de Bricelochlorops Paganelli e o primeiro registro de Urubambina rufa (Duda) (Diptera: Chloropidae) para o Brasil / A new species of Bricelochlorops Paganelli and the first record of Urubambina rufa (Duda) (Diptera: Chloropidae) from Brazil

The subfamily Chloropinae comprises about 442 described species, with only one species recorded from the Brazilian Amazon. The genus Bricelochlorops Paganelli was represented by a unique species from Rio de Janeiro, Brazil. The species Urubambina rufa (Duda) is the only species of the genus Urubambina Paganelli and has been recorded only from Peru. A new species of Bricelochlorops, B. celutae sp. nov., is described here and Urubambina rufa is recorded for the first time in Brazil. Both species were collected in the state of Acre. A key to species of Bricelochlorops is provided.

Neriidae (Diptera: Schizophora) of the Brazilian Amazon: new records of genera and species, and key to species

The present study brings together survey data from collection in several localities in the Brazilian Amazon and specimens from the Entomological Collection of Museu Paraense Emílio Goeldi (MPEG-Belém). The flies were collected over organic decomposing matter (bananas and bovine meat) baits. The genus Odontoloxozus Enderlein, with the species Odontoloxozus peruanus Hennig, is recorded from Brazil for the first time. The species Glyphidops (Glyphidops) flavipes (Widemann), G. (Oncopsia) flavifrons (Bigot), G.(O.) durus (Cresson) and G. (O.) dipsar (Hennig) are new occurrences for Brazil. The species G. (O.)carrerai Aczél and N. plurivittatus Bigot are new occurrences from Brazilian Amazon. A key to Brazilian Amazon species is provided.

O presente estudo fornece dados oriundos de coletas em várias localidades da Amazônia e de espécimes depositados na Coleção Entomológica do Museu Paraense Emílio Goeldi (MPEG-Belém). Os Neriidae foram coletados com armadilhas contendo matéria orgânica em decomposição (banana e pulmão bovino). O gênero Odontoloxozus Enderlein, representado pela espécie Odontoloxozus peruanus Hennig é registrado pela primeira vez no Brasil. As espécies Glyphidops (Glyphidops) flavipes (Widemann), G. (Oncopsia) flavifrons (Bigot), G. (O.) durus (Cresson) e G. (O.) dipsar (Hennig) são novas ocorrências para o Brasil. As espécies G. (O.) carrerai Aczél e N. plurivittatus Bigot são novos registros para a Amazônia Brasileira. Uma chave dicotômica para as espécies é apresentada.