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Rhodnius barretti, a new species of Triatominae (Hemiptera: Reduviidae) from western Amazonia.

Abad-Franch F, Pavan MG, Jaramillo-O N, Palomeque FS, Dale C, Chaverra D, Monteiro FA - Mem. Inst. Oswaldo Cruz (2013)

Bottom Line: Rhodnius barretti, a new triatomine species, is described based on adult specimens collected in rainforest environments within the Napo ecoregion of western Amazonia (Colombia and Ecuador).R. barretti resembles Rhodnius robustus s.l., but mitochondrial cytochrome b gene sequences reveal that it is a strongly divergent member of the "robustus lineage", i.e., basal to the clade encompassing Rhodnius nasutus, Rhodnius neglectus, Rhodnius prolixus and five members of the R. robustus species complex.R. barretti occurs, often at high densities, in Attalea butyracea and Oenocarpus bataua palms.

View Article: PubMed Central - PubMed

Affiliation: Instituto Leônidas e Maria Deane, Fiocruz, Brasil, ManausAM, Instituto Leônidas e Maria Deane-Fiocruz, Manaus, AM, Brasil.

ABSTRACT
Rhodnius barretti, a new triatomine species, is described based on adult specimens collected in rainforest environments within the Napo ecoregion of western Amazonia (Colombia and Ecuador). R. barretti resembles Rhodnius robustus s.l., but mitochondrial cytochrome b gene sequences reveal that it is a strongly divergent member of the "robustus lineage", i.e., basal to the clade encompassing Rhodnius nasutus, Rhodnius neglectus, Rhodnius prolixus and five members of the R. robustus species complex. Morphometric analyses also reveal consistent divergence from R. robustus s.l., including head and, as previously shown, wing shape and the length ratios of some anatomical structures. R. barretti occurs, often at high densities, in Attalea butyracea and Oenocarpus bataua palms. It is strikingly aggressive and adults may invade houses flying from peridomestic palms. R. barretti must therefore be regarded as a potential Trypanosoma cruzi vector in the Napo ecoregion, where Chagas disease is endemic.

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: dorsal (top) and lateral (bottom) views of a Rhodniusbarretti head, showing linear measurements (1-8) (Table) andlandmarks (target spots) used in morphometric analyses. Bar = 1 mm.
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f01: : dorsal (top) and lateral (bottom) views of a Rhodniusbarretti head, showing linear measurements (1-8) (Table) andlandmarks (target spots) used in morphometric analyses. Bar = 1 mm.

Mentions: Morphology and morphometrics - A Zeiss Stemi SV11 stereomicroscope wasused for the measurement and description of morphological characters. Linearmeasurements and head capsule landmark coordinates ( Fig.1 , Table ) were taken from 37 adultR. barretti specimens (34 from Colombia and 3 from Ecuador) and 12R. robustus s.l. (from Colombia, Ecuador, Bolivia, Brazil, FrenchGuiana, Peru, Suriname and Venezuela). Landmark coordinates were recorded usingtpsDig 1.18 ( Rohlf 1999a ).Shape variables were computed using the Generalised Procrustes superimposition algorithm( Rohlf 1996 ), which derives a least-squaresconsensus configuration from raw coordinate data. “Partial warps” were then computed asdeformations of each structure in relation to the consensus configuration usingtpsRelw 1.18 ( Rohlf 1999b ).Shape variables derived from partial warps were used as input for canonical variate(discriminant) analysis and a plot showing the position of each specimen on the “shapediscriminant space” was built with the first two canonical vectors ( Fig. 2 ). Multivariate analyses were conducted usingJMP 3.2.6 (SAS Institute, Cary, NC, USA).


Rhodnius barretti, a new species of Triatominae (Hemiptera: Reduviidae) from western Amazonia.

Abad-Franch F, Pavan MG, Jaramillo-O N, Palomeque FS, Dale C, Chaverra D, Monteiro FA - Mem. Inst. Oswaldo Cruz (2013)

: dorsal (top) and lateral (bottom) views of a Rhodniusbarretti head, showing linear measurements (1-8) (Table) andlandmarks (target spots) used in morphometric analyses. Bar = 1 mm.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4109185&req=5

f01: : dorsal (top) and lateral (bottom) views of a Rhodniusbarretti head, showing linear measurements (1-8) (Table) andlandmarks (target spots) used in morphometric analyses. Bar = 1 mm.
Mentions: Morphology and morphometrics - A Zeiss Stemi SV11 stereomicroscope wasused for the measurement and description of morphological characters. Linearmeasurements and head capsule landmark coordinates ( Fig.1 , Table ) were taken from 37 adultR. barretti specimens (34 from Colombia and 3 from Ecuador) and 12R. robustus s.l. (from Colombia, Ecuador, Bolivia, Brazil, FrenchGuiana, Peru, Suriname and Venezuela). Landmark coordinates were recorded usingtpsDig 1.18 ( Rohlf 1999a ).Shape variables were computed using the Generalised Procrustes superimposition algorithm( Rohlf 1996 ), which derives a least-squaresconsensus configuration from raw coordinate data. “Partial warps” were then computed asdeformations of each structure in relation to the consensus configuration usingtpsRelw 1.18 ( Rohlf 1999b ).Shape variables derived from partial warps were used as input for canonical variate(discriminant) analysis and a plot showing the position of each specimen on the “shapediscriminant space” was built with the first two canonical vectors ( Fig. 2 ). Multivariate analyses were conducted usingJMP 3.2.6 (SAS Institute, Cary, NC, USA).

Bottom Line: Rhodnius barretti, a new triatomine species, is described based on adult specimens collected in rainforest environments within the Napo ecoregion of western Amazonia (Colombia and Ecuador).R. barretti resembles Rhodnius robustus s.l., but mitochondrial cytochrome b gene sequences reveal that it is a strongly divergent member of the "robustus lineage", i.e., basal to the clade encompassing Rhodnius nasutus, Rhodnius neglectus, Rhodnius prolixus and five members of the R. robustus species complex.R. barretti occurs, often at high densities, in Attalea butyracea and Oenocarpus bataua palms.

View Article: PubMed Central - PubMed

Affiliation: Instituto Leônidas e Maria Deane, Fiocruz, Brasil, ManausAM, Instituto Leônidas e Maria Deane-Fiocruz, Manaus, AM, Brasil.

ABSTRACT
Rhodnius barretti, a new triatomine species, is described based on adult specimens collected in rainforest environments within the Napo ecoregion of western Amazonia (Colombia and Ecuador). R. barretti resembles Rhodnius robustus s.l., but mitochondrial cytochrome b gene sequences reveal that it is a strongly divergent member of the "robustus lineage", i.e., basal to the clade encompassing Rhodnius nasutus, Rhodnius neglectus, Rhodnius prolixus and five members of the R. robustus species complex. Morphometric analyses also reveal consistent divergence from R. robustus s.l., including head and, as previously shown, wing shape and the length ratios of some anatomical structures. R. barretti occurs, often at high densities, in Attalea butyracea and Oenocarpus bataua palms. It is strikingly aggressive and adults may invade houses flying from peridomestic palms. R. barretti must therefore be regarded as a potential Trypanosoma cruzi vector in the Napo ecoregion, where Chagas disease is endemic.

Show MeSH
Related in: MedlinePlus