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Search Results: 1 - 10 of 27 matches for " Reduviidae "
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What does determine gonad weight in the wild kissing bug Mepraia spinolai
Botto-Mahan, Carezza;Medel, Rodrigo;
Memórias do Instituto Oswaldo Cruz , 2007, DOI: 10.1590/S0074-02762007005000015
Abstract: female fecundity increases with body size in a variety of insects, but it is unknown if this generalization applies for kissing bugs. in this study, we evaluate whether gonad weight in the bloodsucking insect mepraia spinolai correlates with body size, or determined by nutrition or developmental time. we found that the investment on reproductive tissue correlates positively and significantly with body size and with the amount of ingested blood by female insects along their lifespan. total molting time did not significantly affect gonad weight. we suggest that under optimal feeding conditions m. spinolai females could express their maximum reproductive potential.
Phylogenetic approach to the study of Triatomines (Triatominae, Heteroptera)
Tartarotti, E.;Azeredo-Oliveira, M. T. V.;Ceron, C. R.;
Brazilian Journal of Biology , 2006, DOI: 10.1590/S1519-69842006000400014
Abstract: triatomines are insects belonging to the hemiptera order, heteroptera suborder, reduviidae family and triatominae subfamily. all members of this subfamily are hematophagous. triatomines evolved from reduviidae predators and they are probably polyphyletic in origin. the combination of anatomical, physiological and ethological factors observed in this group, as well as the plesiomorphic and apomorphic characters that differentiate the five tribes and fourteen triatomine genera reinforce the polyphiletic hypotesis. however if we consider the five groups of triatomines, the rhodniini, cavernicolini, bolboderini, linshcosteini and alberproseniini tribes constitute monophyletic groups, while the triatomini tribe is considered polyphyletic. the new world is the center of triatomine diversity and seems to be the point of group origin. of approximately 137 triatomine species, 105 are only found in the americas. it is now considered that triatomines represent a polyphyletic group defined according to their convergent apomorphic hematophagous characters, which have appeared several times in reduviidae. this study revises the phylogeny of these vectors of chagas' disease, covering such topics as the origin of hematophagy in triatomines and ancestral proposal for the group.
Elgueta,Mario; Carpintero,Diego L.;
Gayana (Concepción) , 2004, DOI: 10.4067/S0717-65382004000100010
Abstract: introduction in chile of zelus cervicalis st?l is informed and it establishment is associated to commercial traffic. a brief redescription, synonymical and bibliographic data, known biological aspects, geographic distribution and adult figure are given
The triatominae species of French Guiana (Heteroptera: Reduviidae)
Bérenger, Jean-Michel;Pluot-Sigwalt, Dominique;Pagès, Frédéric;Blanchet, Denis;Aznar, Christine;
Memórias do Instituto Oswaldo Cruz , 2009, DOI: 10.1590/S0074-02762009000800007
Abstract: an annotated list of the triatomine species present in french guiana is given. it is based on field collections carried out between 1993-2008, museum collections and a literature review. fourteen species, representing four tribes and six genera, are now known in this country and are illustrated (habitus). three species are recorded from french guiana for the first time: cavernicola pilosa, microtriatoma trinidadensis and rhodnius paraensis. the two most common and widely distributed species are panstrongylus geniculatus and rhodnius pictipes. the presence of two species (panstrongylus megistus and triatoma maculata) could be fortuitous and requires confirmation. also, the presence of rhodnius prolixus is doubtful; while it was previously recorded in french guiana, it was probably mistaken for r. robustus. a key for french guiana's triatomine species is provided.
Triatominos (Reduviidae: Triatominae) en un foco de enfermedad de Chagas en Talaigua Nuevo (Bolívar, Colombia)
Cortés,Luis Alberto; Suárez,Henry Alberto;
Biomédica , 2005,
Abstract: introduction. the epidemiological importance and ecological characteristics of triatomines were investigated in a chagas disease focus in talaigua nuevo, bolivar province. objective. to describe and correlate the ecological characteristics of triatomines in a chagas disease focus. materials and methods. triatomines were collected in 300 domiciles located in the urban zone of talaigua uevo. this included inspection of microhabitats in and around the domestic environment, and also wine palms, woodpiles and firewood. results. among the 103 triatomines collected, four species were identified-- triatoma maculata, eratyrus cuspidatus, panstrongylus geniculatus, and rhodnius prolixus. t. maculata was the most abundant species (92.23%). the majority (93%) were collected in the intradomiciliary environment. conclusion. individuals of t. maculata naturally infected with trypanosoma were recorded for the first time in bolivar province. the distribution range of p. geniculatus and r. prolixus was expanded. using a multiple correspondence analysis, no relationship was discerned between the house type and occurrence of triatomines.
Observa??es sobre a biologia de Apiomerus Lanipes (Fabricius) (Hemiptera, Reduviidae)
Amaral Filho, Benedicto Ferreira do;Gióia, Ismael;Waib, Claudia Maria;Mendeleck, Elaine;C?nsoli, Fernando Luis;
Revista Brasileira de Zoologia , 1994, DOI: 10.1590/S0101-81751994000200012
Abstract: the aim of lhe presenl work is to descrihe the biological cycle of the apiomenis lanipes (fabricius, 1803) (hemiptera, reduviidae) on lahoralory conditions. adults of drosophila sp. (diptera, drosophilidae) and ceralitis capitula (wiedemann, 1824) (diptera. tephritidae) was offered for hug feeding (nymphs and adults). the developmenlal of the entire cycle (egg to adult) was 288.26 days and 294.85 days for males and females, respectively. the duration of egg stage and nymphal stage was 23.5 days and 269.02 days, respectively.
Aspectos morfológicos de ovos de triatominae: II - Características macroscópicas e exocoriais de dez espécies do gênero Rhodnius Stal, 1859 (Hemiptera - Reduviidae)
Barata,José Maria Soares;
Revista de Saúde Pública , 1981, DOI: 10.1590/S0034-89101981000500006
Abstract: morphological studies of exochorial patterns of rhodnius (hemiptera-reduviidae) genus were made. ten species were studied by scanning and common microscopy, and data were described mainly for systematic purposes. the species included are rhodnius domesticus neiva & pinto, 1923; r. ecuadoriensis lent & leon, 1958; r. nasutus stal, 1959; r. neglectus lent, 1954; r. neivai lent, 1953; r. pallescens barber, 1932; r. paraensis sherlock, guitton & miles, 1977; r. pictipes stal, 1872; r. prolixus stal, 1859; and r. robustus larrousse, 1927. general aspects of eggs and shells such as shape, color patterns, and size measurements are also presented. data about changes of coloration occurred during egg maturation were recorded and related to the embryonic development. the characteristics described were utilized to work out identification keys for these triatominae eggs, both by optical and scanning electron microscopy.
Glandular areas associated with the male genitalia in Triatoma rubrofasciata (Triatominae, Reduviidae, Hemiptera) and other Reduviidae
Weirauch, Christiane;
Memórias do Instituto Oswaldo Cruz , 2003, DOI: 10.1590/S0074-02762003000600011
Abstract: in this paper, glandular areas associated with the phallus in triatoma rubrofasciata are described and illustrated for the first time. the glandular areas lie in the membrane surrounding the articulatory apparatus. in order to unambiguously define the locality of the respective glandular areas, some features of the pygophore-phallus connection are redescribed. a possible functional context of the gland secretions is discussed. a preliminary study of several other reduviidae implies that the described glandular areas occur in a wider range of taxa in this group.
Nota sobre tipos e espécimes de triatomíneos depositados na Cole??o Entomológica do Instituto Butantan, S?o Paulo (Hemiptera:Reduviidae)
Marassá, Ana Maria;Barata, José Maria Soares;
Revista da Sociedade Brasileira de Medicina Tropical , 2000, DOI: 10.1590/S0037-86822000000200013
Abstract: a list of 8 type specimens belonging to the subfamily triatominaeis deposited in the entomological colection of the instituto butantan. this note reports a chronological description of the collection including 343 specimens represented by 5 species of panstrongylus, 18 species of triatoma, 2 species of psamolestes and rhodnius
A preliminary study of haemolymph from four Venezuelan populations of Panstrongylus geniculatus Latreille, 1811 (Hemiptera: Reduviidae) and its epidemiological significance
Reyes-Lugo,Matías; Girón,María E; Kamiya,Haruo; Rodríguez-Acosta,Alexis;
Revista Cubana de Medicina Tropical , 2006,
Abstract: sds-page profiles of both sexes of the haemolymphs of panstrongylus geniculatus from different venezuelan regions (savannas, piedmont, tropical forest and urban areas) were compared. it was determined that the haemolymphs showed a different electrophoretic profile, with proteins that ranged from 14 to 164 kda. the most representative protein band in the profile of females was observed in two sectors: between 164 and 46 kda and between 33 and 30 kda. the main illustrative protein band in males was observed in one region: from 46 to 35 kda. the haemolymph composition of p. geniculatus from populations evaluated in this work expressed high homogeneity of this species with a clear difference between males and females. this similarity may be useful for control of these insects, taking into account that the genetic stability may be very important, since the use of an insecticide in a population with these characteristics is always more successful. according to the bibliographic review, this is the first study of haemolymph from panstrongylus geniculatus.
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