Acta Amazonica, Volume: 7, Issue: 3, Published: 1977
  • Programa Nacional de Pesquisas Arqueológicas na Bacia Amazônica Editorial

    Simões, Mário F.
  • Cubiu [Solanum topiro (Humb. & Bonpl.)], uma fruteira da Amazônia Agronomia

    Pahlen, Alejo von der

    Abstract in Portuguese:

    Resumo É descrita a coleção, comportamento agronômico e a variabilidade genética do cubiu (Solanum topiro H & B), uma frutífera herbácea. Foram coletadas 35 introduções na Amazônia, desde Belém do Pará (Brasil) até Iquitos (Peru). Uma grande variabilidade genética foi encontrada para forma e tamanho do fruto, especialmente na região oeste. Parte da coleção foi plantada. A produção começou aos 6-7 meses após a semeadura e praticamente terminou 3 meses depois. A produção de frutos, por planta, variou de 2,5 kg até 14 kg dependendo do solo e do genótipo.

    Abstract in English:

    Summary The collection, agronomic behavior and variability of cubiu (Solanum topiro H & B), an herbaceous fruit plant, is described. Thirty five accesions were collected in Amazonia from Belém do Pará (Brazil) till Iquitos (Peru). A large genetic variability was found for shape and size fruit, specially in the west of the region. Part of the collection was planted. The production began six to seven months after sowing and practically finished three months later. It varied per plant from 2.500 kg ot 14.000 kg depending on soil conditions and genotype.
  • Algumas plantas visitadas para obtenção de pólen por operárias de Melipona seminigra merrillae em Manaus Botânica

    Absy, Maria Lúcia; Kerr, Warwick Estevam

    Abstract in Portuguese:

    Resumo Estuda-se a carga transportada nas patas por 267 abelhas de Melipona seminigra durante um ano, em Manaus. Dessas, 104 (39%) não transportavam pólen, mas sim látex (no nosso caso do fruto de Vismia, inclusive com sementes), resinas e barro. Das 163 restantes (61%), 99 transportavam pólen de uma só espécie, 38 (23%) transportavam de duas espécies e 26 (16%) de três ou mais. As abelhas colheram pólen de 19 famílias e 25 gêneros diferentes. Apenas 13 tipos de pólen foram identificados até o nível de espécie.

    Abstract in English:

    Summary During one year, in Manaus, the loads in the corbicula of 267 bees Melipona seminigra (from 13 to 27 per month) were studied. Of these, 104 (39%) had latex, resin or mud that the workers mix with wax in order to save energy; one corbicula load of mud or resin substitutes for 12 to 15 loads of nectar if this nectar is to be transformed into wax. Ninety-nine bees (60.7%) brought pollen of a single species of plant, 38 (23.3%) of two species of plants and 26 (15.9%) of three or more types of pollen. Among pollen types 19 families and 25 genera were represented. Only 13 types of pollen were identifyed to species: Bellucia imperialis, Bixa orellana, Cordia lanata, Croton lanjouwensis, Eschweilera fracta, Inga edulis, Mauritia flexuosa, Mimosa pudica, Protium heptaphyllum, Stachytarpheta cayennensis, Tapirira guianensis, Vernonia scabra, Warszewiczia coccinea.
  • Diversas plantas comestíveis nativas do noroeste da Amazonia ( Botânica

    Schultes, Richard Evans

    Abstract in Portuguese:

    Resumo São apresentadas diversas observações botânicas e etnobotânicas de algumas plantas pouco conhecidas, que são alimentos comuns para várias tribos de índios. As plantas estudadas pertencem aos gêneros Erythroxylon (coca), Hevea (seringueira), Micrandra, Vaupesia, Macoubea (amapá-doce), Maranta, Calathea (ariá), Pourouma (mapati), Pouteria (ucuqui), e outros.

    Abstract in English:

    Summary Miscellaneous ethnobotanical observations on several little know or unusual aboriginal food plants of the nortwestern Amazon of Brasil and Colombia are discussed. The plants considered belong to the genera Erythroxylon, Hevea, Maranta, Micrandra, Pourouma, Pouteria and Vaupesia.
  • Aspectos da ultra-estrutura do pólen de Passiflora coccinea Aubl. (Passifloraceae) Botânica

    Carreira, Léa Maria Medeiros

    Abstract in Portuguese:

    Resumo Os grãos de pólen da espécie Passiflora coccinea Aubl. (Passifloraceae) apresentam uma exina complexa, largamente reticulada. Por meio de micrografias eletrônicas, foram identificadas as camadas constituintes da exina e também diferentes estruturas celulares normalmente encontradas nos grãos de pólen.

    Abstract in English:

    Summary The pollen grains of Passiflora coccinea Aubl. (Passifloraceae) present a complex largely reticulated exine. The layers of exine and the different celular structures normally found in the pollen grains are recognized by means of electron micrographs.
  • Estudos da flora orquidológica do Estado do Amazonas. II - Masdevallia osmariniana Braga (Orchidaceae), espécie nova da flora amazônica Botânica

    Braga, Pedro Ivo Soares

    Abstract in Portuguese:

    Resumo Com a presente espécie, proposta sob o nome de Masdevallia osmariniana, eleva-se para nove o número de taxa do gênero ocorrentes na Amazônia. Pela primeira vez descreve-se, nesta região, uma espécie pertencente ã seção Rhombipetala.

    Abstract in English:

    Summary In this paper the autor discribes a new species of Masdevallia (Orchidaceae) from amazoniam region. Now the number of species of that genus extendes to nine in this region. The new species M. osmariniana, differes mainly from the nearest species, M. o'brieniana in the linear-lanceolate leaves, petals 2-venoses, unguiculo costulated, lip apex denticulate, column with auricles erose in the base and corniculate at the apex and. finally, by clinandrium at the apex bipartite.
  • Estudos comparativos da variabilidade na composição da resina da folha entre árvore parental e progênie de espécies selecionadas de Hymenaea. I. Comparação de populações amazônicas e venezuelanas Botânica

    Langenheim, Jean H.; Stubblebine, Will; Foster, Craig; Nascimento, José Carlos

    Abstract in Portuguese:

    Resumo Este estudo é parte de uma longa investigação sobre a variação na composição da resina em leguminosas tropicais do genero Hymenaea e os possíveis papéis ecológicos que estas resinas desempenham nos ecossistemas tropicais. Este trabalho constitui o primeiro de uma série onde comparar-se-á a variação em composição entre árvore parental (ou "árvore mãe" como é também mencionada no decorrer deste trabalho) e progênie de diferentes espécies de Hymenaea na Hiléia Amazônica com outros ecossistemas tropicais. Aqui são apresentadas as bases gerais para estudos em ecologia química de resinas nos trópicos. Foram estudados exemplares de H. intermedia e H. parvifolia da Reserva Ducke, do Instituto Nacional de Pesquisas da Amazônia (INPA), próxima a Manaus, Amazonas, Brasil, e exemplares de H. courbaril da Laguna de Los Patos, local adjacente a Estacion Biologica de Los Llanos, próximo a Calabozo, Guarico, Venezuela. Consistentes diferenças ocorreram na composição da resina (isto é, tipos químicos) entre árvores parentais e plântulas sobreviventes sob suas copas em H. intermedia e H. parvifolia nas condições de floresta tropical úmida da Amazônia Central. Consideravelmente menor variabilidade ocorreu entre árvore parental e progênie em condições de savana na Venezuela Central. Não se sabe se a composição da resina da folha modifica-se com mudanças ontogenéticas da árvore desde plântula até o estágio adulto. Todavia, o que parece significante é que sob condições de florestas tropicais úmidas, onde a maior pressão herbívora seria prevista, existe diferença gritante entre a composição da resina da folha da árvore mãe (parental) e sua progênie, bem como entre árvores adultas. Esta diversidade é hipotetizada através da seleção contra qualquer um ou ambos predadores sensíveis à distância e à densidade. Estes resultados preliminares serão analisados mais extensivamente em estudos subseqüentes.

    Abstract in English:

    Summary This study is a part of a long-range investigation of the variation in resin composition in the tropical leguminous genus Hymenaea and the possible ecological role of these resins within tropical ecosystems. Although the stem, pod and leaf resins are being studied comparatively, emphasis has been placed on the leaf resin system because of the relative simplicity of the chemistry, opportunities for experimental studies on seedling plants under controlled environmental conditions and expected heavy selection pressures on seedlings in the field. The leaf resins from all species of Hymenaea contain 17-18 sesquiterpene hydrocarbons which vary quantitatively such that six compositional types have been recognized. Previous studies of leaf resin composition of 11 species of Hymenaea and 53 populations of the widespread H. courbaril have shown centers of diversity in composition to occur in Amazonia and in southern Brazil in contrast to very little diversity in central and northern South America. Previous investigations of the effects of temperature, light intensity and extreme differences in photoperiod have indicated the low degree of phenotypic plasticity of leaf resin composition in response to physical factors of the environment. Thus it appears that there is strong genetic control over this resin composition. Genetically controlled patterns in resin composition might be due either to random genetic variation or to genetic variation under selective pressures from various environmental conditions. Although there has been considerable controversy regarding this question in attempts to explain floral diversity generally in tropical rainforests (where only differences in adaphic conditions among physical factors of the environment seem to vary sufficiently to exert significant selective pressures), the role of predators or pathogens as selective agents is increasingly being suggested. Also it has been pointed out that an effective way for plants to meet the challenge of predation is by alterning their chemistry. These are changes which are transmitted genetically. The more favorable the physical environment for predators or parasites, the more frequently in evolutionary time the chemical defenses of the plant will have to be modified through genetic changes if the plant is to be successful in the community. Thus one could conclude that recombination systems in higher plants in tropical rainforests and species are subject to directional pressures from herbivores and pathogens in an "evolutionary arms race". These agents of selection favor improvement of defensive posture on the part of the plant hosts which will be balanced in turn by counter adaptation by the predator or parasite. Tropical floras appear to be better endowed than temperate ones with secondary chemicals Which may function defensively. The rate at which chemical resistance to herbivores is achieved is dependent upon a variety of conditions, such as the number of genes controlling the chemistry, dominance of the traits, relative general fitness, the tolerance of the plant, size of the herbivore population, etc. Gene substitution at one or few loci may alter the secondary metabolism of a plant in such a way that it becomes resistant to a given herbivore, and alleles for resistance have been found to be dominant over those for susceptibility. Perhaps too much emphasis in the past has been given to the role of insect predators of plants because the chemical defenses of most plants probably will be revolutionary with a variety of predators and parasites. However, relatively little is known at present about the relative importance of selective pressures of different kinds of herbivores in evolution of the defenses of plants. Also recent research has indicated that chemical defenses of plants may have far-reaching affects in natural ecosystems, i.e., chemical defense systems against herbivores and pathogens may very as a function of plant persistance and abundance, which in turn affects the ecology of herbivores and their plant foods in different ecosystems. In this study leaf resin composition of Hymenaea was compared between parent trees and their progeny in three species: H. intermedia and H. parvifolia from the rainforest ecosystem at Reserva Ducke near Manaus, Amazonas, Brazil and H. courbaril from the savanna ecosystem at Laguna de Los Patos adjacent to the Estacion Biologica de Los Llanos near Calabozo, Guarico, Venezuela. Gas liquid chromatographic analyses were made of resins from leaves collected from seedlings and saplings growing under the canopy of the tree as well as from saplings grown in the greenhouse from seeds originating from some of the same parent trees. Age of the seedlings collected in the field are unknown but specimens from H. intermedia and H. parvifolia are known from phenological data to be at least three years old. Plants of H. parvifolia grown in the UCSC greenhouse vary in age from 6-10 years. Three chemical types were represented among the adult trees but only one type appeared among the progeny under each parent tree. For example, the parent tree of H. parvifolia have leaves with Type I resin composition and all of the surviving seedlings have Type V. However, greenhouse grown saplings of H. parvifolia from seed collected from the same parent tree had three types (I, II and V). An anticipated less variable pattern occurred in H. courbaril from the savanna ecosystem. Both parent tree had leaves of Type II composition with a large number of both seedlings with leaves also of Type II. One tree also had saplings, as well as seedlings, which were also Type II. This predominance of Type II composition of seedlings agrees with previous extensive analysis of greenhouse grown seedlings from various populations of H. courbaril in Central and northern South America. Six other adult trees were also characterized by Type II composition. It is not known whether leaf resin composition changes with ontogeny of the tree from seedling to adult. In some cases, the only type found at various stages of ontogeny has been Type II, which is the most common and generally the most variable type. In any event, whether or not chemistry changes with ontogenetic changes, results from this study indicate that under tropical rainforest conditions there is striking difference in leaf resin composition between parent trees and their progeny. It is in this habitat that the greatest diversity of predators and parasites would be expected. Considerably less variability occurs between parent tree and progeny in the savanna conditions in Venezuela. Here it might be assumed that diversity of herbivores and pathogens would be less than the rainforest. Research in several areas in the tropics has indicated that both distance — and density — responsive predators will tend to eliminate progeny under the canopy of the parent tree or close to it. Therefore it has been assumed that any strategy that enables a tropical tree to disperse its seed away from the parent is likely to help ensure the success of the progeny. On tropical islands, where there are fewer predators and parasites than on mainland sites, seedlings and saplings are often prolific under and adjacent to parent trees. In light of these observations, it is interesting that Hymenaea seedlings are successful under parent trees in both mainland sites studied in this paper, and even under the assumed peak diversity of predators and parasites in the Amazonian rainforest. The question then arises as to why seedlings of these species of Hymenaea are successful under their parent trees, albeit in varying degrees in the two tropical ecosystems. The preliminary results from this study suggest evolution of a successful chemical defense by the plant in response to predation (probably both distance — and density-responsive). Variability in leaf resin composition of seedlings may be an adaptive mechanism enabling them to grow close to or immediately under the canopy of the parent tree in Amazonia. Also, if the seedlings of a different chemical type are successful in becoming established near the parent (and do not change ontogenetically to the type of the parent), this will lead to diversity of types among the adult trees. Diversity of leaf resin composition among the adults probably is of less significance than among the seedlings since the adults can withstand predation (except repeated defoliation) better than younger plants. Less variability in leaf resin types in the llanos might possibly indicate less predator pressures there than in Amazonia. However, this might well be a relative phenomenon because the chemical variability has been measured in terms of chemical types. These types are characterized primarily by the major compounds, whereas certain kinds of herbivores and parasites might be deterred either by the presence or particular concentration of a compound (even in small quantities) or synergistic effects of several compounds. From previous studies it is known that bulk leaf resins from Hymenaea can affect the pupal weight, length of time to pupation and mortality due to viral infection of the widespread legume generalist, beet army worm. Analyses of the effects of single components or particular combinations of them have not been attempted as yet. This preliminary study opens many doors for exploration. Direct study of the genetic control of sesquiterpene synthesis is infeasible in such trees as Hymenaea. Our increasing knowledge of the patterns of variation in leaf resin composition is aiding our understanding of the biochemical pathways through analysis of co-occurrence of the sesquiterpenes. Perhaps by analogy we can later speculate as to whether certain compounds are under single gene regulation and possible dominance relationships. In subsequent papers in this series we plan to include another Amazonian species (H. courharil v. subsessilis) and a more detailed examination of the important central Amazonian species H. intermedia and compare them with two species in southern Brazil (H. stigonocarpa in the cerrado and H. courbaril v. stilbocarpa in riparian forests).
  • Precipitable water and water vapor flux between Belém and Manaus() Ciências Do Ambiente

    Marques, José; Santos, Jesus Marden dos; Villa Nova, Nilson Augusto; Salati, Eneas

    Abstract in Portuguese:

    Resumo O fluxo de vapor e a água precipitável foram computados sobre a floresta natural Amazônica na faixa entre Belém e Manaus para o ano de 1972. O conceito de ramo aéreo tío ciclo hidrológico foi aplicado e as mais significativas conclusões, em base anual foram: o vapor dágua oriundo do Oceano Atlântico contribui com 52% para a precipitação na região e é significante o papel desempenhado pela evapotranspiração local para a precipitação na área; existem indicios tío fenômeno da reciclagem do vapor dágua durante o ano. A evapotranspiração contribui com 48% para a precipitação na área estudada. A evapotranspiração real estimada por este método foi de lOOOmm ano-1.

    Abstract in English:

    Abstract The water vapor flux and precipitable water was computated over the natural Amazon forest in the stretch between Belem and Manaus for 1972. The atmospheric branch of hidrological cycle teory was applied and the most significant conclusions on an annual basis are: Atlantic Ocean water vapor contributes 52% to the regional precipitation and is significant the role played by local evapotranspiration in the precipitation in the area; there were signs of the phenomenon of water vapor recycling nearly throughout the year. Evapotranspiration contribute to 48% of the precipitations in the area studied. The real evapotranspiration estimated by this method was 1,000mm year-1.
  • Estratégias de sobrevivência: o uso de recursos ao longo da rodovia Transamazônica () Ecologia

    Moran, Emílio F.

    Abstract in Portuguese:

    Resumo O presente trabalho descreve a utilização de recursos por uma população pioneira ao longo da rodovia Transamazônica e as mudanças resultantes no ambiente e no comportamento sócio-econômico dessa população.

    Abstract in English:

    Summary The cultural ecological point of view attempts to look at man and his environment as parts in interaction, rather than as separate entities. Man's physical environment has undergone modifications as a result of his activities, just as culture has been modified by the specific requirements of survical in a given ecosystem. This paper discusses resource utilization along the Transamazon Highway by a pioneer population and both the changes that have taken place in the environment and in the population's socio-economic behavior as a result of this interaction.
  • The chemical composition of Amazonian plants () Fitoquímica

  • Aspectos do problema das cáries dentárias no Estado do Amazonas Nutrição

    Shrimpton, Roger; Giugliano, Rodolfo

    Abstract in Portuguese:

    Resumo São apresentados dados sobre a incidência de cáries em 193 crianças pobres de 1 a 8 anos de idade em Manaus, Amazonas, 1976. A incidência de cáries foi de 77,7%, sendo que no grupo etário de 8 anos atingiu a 97,9%. Possíveis fatores locais envolvidos na evolução das cáries e as possíveis medidas a serem tomadas são discutidos. São enfatizadas a inapropriedade do tratamento dentário conservador e a essencialidade de medidas preventivas nesta área tão grande mas esparsamente povoada. A promoção da amamentação sobre a alimentação artificial nas primeiras semanas de vida da criança e a fluoretação do sal, são sugeridas como medidas práticas de mínimo custo e máximo alcance na redução das cáries em populações rurais e urbanas da Bacia Amazônica.

    Abstract in English:

    Summary The problem of dental caries in Manaus, Amazonas, is discussed. Results are presented showing 77.7% incidence in 193 children between one and eight years of age. The factors involved in the evolution of dental caries are described and possible means of atacking the problem considered. The fluoridization of the local water supplies will only reach more priveleged sectors of the population in urban areas. The possibility of using a vehicle such as salt in order to benefit more of the population should be investigated. Promotion of breast feeding at least in the first weeks of life should be stimulated.
  • Estudo antropométrico e clínico do estado nutricional em um grupo de crianças pré-escolares de Manaus, 1976 ( Nutrição

    Giugliano, Rodolfo; Shrimpton, Roger

    Abstract in Portuguese:

    Resumo Exame físico e medidas antropométricas foram realizados em 122 crianças pré-escolares de Manaus. O estudo foi efetuado numa instituição que abriga crianças pobres, em regime de semi-internato, possibilitando aos pais trabalharem fora. Alto índice de desnutrição foi encontrado, acompanhado de sinais de carência de Vitamina A e anemia. A incidência de cáries dentárias também foi alta nesse inquérito.

    Abstract in English:

    Summary A clinical and anthropometric evaluation of nutritional status in 122 poor pre-school children in Manaus, showed that 66,4% of the children were suffering from different grades of malnutrition. Clinical signs associated with deficiencies of Vitamin A and Iron indicate the necessity for the further study of these problems. The synergistic roles of infection and nutrition in growth are discussed.
  • Bactérias enteropatogênicas em lactentes de um bairro de Manaus-Amazonas ( Patologia Tropical

    Giugliano, Loreny Gimenes; Giugliano, Rodolfo; Pinheiro, M.ª de Fátima S.

    Abstract in Portuguese:

    Resumo Foram realizadas culturas de fezes de aproximadamente 10% dos lactentes de uma população urbana de Manaus-Amazonas. No momento da coleta 32,50% das crianças se encontravam com diarréia e 69,44% apresentavam história anterior da enfermidade. Das crianças diarréicas foram isolados uma cepa de Shigella sonnei e 5 diferentes sorogrupos de Escherichia coli enteropatogênica. Das crianças sem diarréia isolaram-se 3 amostras de Salmonella sp e 5 diferentes sorogrupos de E. coli enteropatogênica. As cepas de Shigella sonnei e E. coli enteropatogênicas apresentaram resistência múltipla quando submetidas ao teste de susceptibilidade à antimicrobianos.

    Abstract in English:

    Summary Bacteriological studies were carried out on approximately 10% of the infants of a poor urban population in Manaus - Amazonas. One third of the infants had diarrhoea at the time of faeces collection. One strain of Shigella sonnei and five different serogroups of enteropathogenic E. coli were isolated from the faeces of the infants with diarrhoea. Three strains of Salmonella sp. and five different serogroups of pathogenic E. coli were isolated in the faeces of infants without diarrhoea. The strains of Shigella sonnei and pathogenic E. coli showed multiple resistance to antimicrobial drugs.
  • Estudo sobre um surto de malária entre os índios Mayongong e Sanomã (Norte de Roraima) () Patologia Tropical

    Ferraroni, José João; Hayes, Jack

    Abstract in Portuguese:

    Resumo Em abril de 1977 ocorreu um surto de malária falciparum nas Tribos Sanomã e Mayongong, em Roraima, na fronteira do Brasil e Venezuela. Duzentos e sessenta e oitc silvícolas foram examinados para malária e 91 casos foram positivos, dois para Plasmodium vivax e 89 para Plasmodium falciparum. O vetor responsável pela epidemia foi o Anopheles darlingi com uma atividade média de 64 picadas/homem por noite. Três casos de falciparum foram resistentes às cloroquinas. respondendo favoravelmente ao Fansidar (sulfadoxina e pirimetamina). Houve diferença distinta nas duas tribos baseada na proximidade da população do vetor. Essas diferenças foram apresentadas por idade e sexo. Foi interessante a descoberta de um grupo de Sanomã que, no esforço para livrar-se ao ataque da malária, fugiu para outra área. Este grupo foi encontrado em localidade que não possuia mosquitos.

    Abstract in English:

    Summary In april, 1977, an outbreak of falciparum malaria occured in the Sanomã and Mayongong indian tribes in Brazil (Roraima) bordering Venezuela. Two hundred and sixty-eight indians were examined for malaria and 91 cases were found. Only one vector species, Anopheles darlingi was found, whose activities averaged 64 bites per man per night. Three cases of falciparum were resistant to chloroquine but responded favorably to Fansidar (sulphadoxina and pyrimethamine). There were distinct differences between tribes based on the proximity to the vector population. These differences are presented by age and sex. One group of Sanomã in an effort to escape malaria moved to a remote area, which interestingly was free of man-biting mosquitoes.
  • Contribuição para o estudo dendrológico e anatômico da madeira de três espécies de Qualea (Vochysiaceae) da Amazonia Tecnologia

    Loureiro, Arthur A.; Silva, Marlene Freitas da

    Abstract in Portuguese:

    Resumo Os autores apresentam o estudo de 3 espécies euxilóforas da Amazônia, pertencentes ao gênero Qualea (Vochysiaceae) — Q. albiflora, Q. cassiquiarensis e Q. paraensis. Para cada espécie são apresentadas as seguintes indicações: a) da árvore — caracteres botânicos gerais, habitat, ocorrência geográfica, nomes vulgares e fenologia; b) da madeira — caracteres gerais, descrição macro e microscópica, 3 macro e 6 microfotografias do lenho, 3 estampas esquemáticas das diferentes formas dos elementos vasculares encontrados nas espécies, um quadro das principais características anatômicas diferenciais das espécies e usos comuns.

    Abstract in English:

    Summary In the paper, a contribution to the dendrological knowledge of the Amazonian species of the family Vochysiaceae is given by the authors, by including botanical description, geographical distribution, habitat and anatomical description of wood of the following species: Qualea albiflora, Q. cassiquiarensis and Q. paraensis. 9 illustrations of the woods described and a list of the principals anatomical characteristics are included in this paper.
  • Inpaichthys kerri n. g. n. sp., um novo peixe caracídeo do alto rio Aripuanã, Mato Grosso, Brasil Zoologia

    Géry, J.; Junk, W. J.

    Abstract in Portuguese:

    Resumo É descrito um novo peixe caracídeo (Pisces, Cypriniformes, Characoidei) pertencente a um novo gênero Inpaichthys kerri n.g.n sp., coletado perto da Estação do Núcleo Aripuanã do Instituto Nacional de Pesquisas da Amazônia (INPA), ao Norte de Mato Grosso, Brasil. A espécie nova possui linha lateral incompleta e nadadeira caudal nua. Os dentes são tricuspidados, em duas séries muito irregulares no pré-maxilar; a série interna geralmente composta de somente dois dentes medianos em cada lado. A maxila é dentada em metade de sua borda, geralmente com 7 a 8 dentes tricuspidados e cônicos. Esta dentição, em combinação com outras características morfológicas descritas no trabalho, difere o Inpaichthys dos outros gêneros da subfamília Tetragonopterinae.

    Abstract in English:

    Summary A new little Tetra (Pisces. Cypriniformes, Characoidei) belonging to a new genus Inpaichthys kerri n. g. n. sp., is described. It was collected near the field station of Instituto Nacional de Pesquisas da Amazônia (INPA), Núcleo Aripuanã, in the north of Mato Grosso - Brazil. This species has the lateral line incomplete and the caudal fin naked. The teeth are tricuspidate in two very irregular rows on the premaxilla. The inner row is usually composed of only 2 median teeth on each side. The maxilla is toothed on half of its edge, with usually 7 or 8 tricuspidate to conical teeth. This dentition in combination with other morphological characters described in the paper differentiate Inpaichthys from the other genera, of the subfamily Tetragonopterinae.
  • Two new species of Bittacidae (Mecoptera) from the Amazon Basin Zoologia

    Penny, Norman D.

    Abstract in Portuguese:

    Resumo Duas novas espécies de Bittacidae (Mecoptera) da Reserva Biológica Humboldt, Estado de Mato Grosso, Brasil, são descritas com todos os dados ecológicos observados.

    Abstract in English:

    Abstract Two new species of Bittacidae (Mecoptera) from Humboldt Biological Reserve, Mato Grosso state, Brazil, are described and ecological notes are given.
  • Four new species of Neotropical Cyclocephalini (Coleoptera: Scarabaeidae) () Zoologia

    Ratcliffe, Brett C.

    Abstract in Portuguese:

    Resumo Quatro novas espécies de Cyclocephalini (Coleoptera: Scarabaeidae) são descritas. Estas são: Aspidolea lindae, da Colômbia; Mimeoma englemani, do Panamá; Stenocrates rabbanii, do Brasil; e Stenocrates haacki, também do Brasil.

    Abstract in English:

    Abstract Four new species of Cyclocephalini are described. These are Aspidolea lindae from Colombia, Mimeoma englemani from Panamá, Stenocrates rabbanii from Brazil, and Stenocrates haacki, also from Brazil.
  • Taxa de substituição horizontal de dentes no peixe-boi Notas & Comunicações

    Domning, Daryl P; Magor, Diana M.

    Abstract in English:

    Summary Teeth shed from the horizontally-advancing tooth rows of captive Amazonian manatees (Trichechus inunguis) indicate a rate of tooth row movement of about 1 mm/month. The movement appears to be initiated by weaning and continues throughout life, with variations in rate correlated with overall growth rate but independent of rate of tooth wear.
  • Ocorrência de seis casos suspeitos, autóctones sorologicamente positivos ( Moléstia De Chagas Na Amazônia

    Ferraroni, J. J.; Melo, J. A. Nunes de; Camargo, Mário E.

    Abstract in English:

    Summary The authors present the first six possible autoctonus serologically positive cases of Chagas disease in farmers from municipality of Barcelos, in the State of Amazonas, Brazil. This region has many "piaçaba" palm trees (Leopoldinia piassaba) which harbor numerous triatomes in nature.
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