Revalidation and redescription of Triatoma brasiliensis macromelasoma Galvão, 1956 and an identification key for the Triatoma brasiliensis complex (Hemiptera: Reduviidae: Triatominae)

Triatoma brasiliensis macromelasoma is revalidated based on the results of previous multidisciplinary studies on the Triatoma brasiliensis complex, consisting of crossing experiments and morphological, biological, ecological and molecular analyses. These taxonomic tools showed the closest relationsh...

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Published in:Memórias do Instituto Oswaldo Cruz 2013-09, Vol.108 (6), p.785-789
Main Authors: Costa, Jane, Correia, Nathália Cordeiro, Neiva, Vanessa Lima, Gonçalves, Teresa Cristina Monte, Felix, Márcio
Format: Article
Language:English
Subjects:
Animals
Brazil
Chagas disease vector
Female
Heteroptera
Insect Vectors - anatomy & histology
Insect Vectors - classification
kissing bug
Male
morphology
PARASITOLOGY
Reduviidae - anatomy & histology
Reduviidae - classification
taxonomy
Triatoma - anatomy & histology
Triatoma - classification
Triatominae - anatomy & histology
Triatominae - classification
TROPICAL MEDICINE
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Summary:Triatoma brasiliensis macromelasoma is revalidated based on the results of previous multidisciplinary studies on the Triatoma brasiliensis complex, consisting of crossing experiments and morphological, biological, ecological and molecular analyses. These taxonomic tools showed the closest relationship between T. b. macromelasoma and Triatoma brasiliensis brasiliensis. T. b. macromelasoma is redescribed based on specimens collected in the type locality and specimens from a F1 colony. The complex now comprises T. b. brasiliensis, T. b. macromelasoma, Triatoma melanica, Triatoma juazeirensis and Triatoma sherlocki. An identification key for all members of the complex is presented. This detailed comparative study of the morphological features of T. b. macromelasoma and the remaining members of the complex corroborates results from multidisciplinary analyses, suggesting that the subspecific status is applicable. This subspecies can be distinguished by the following combination of features: a pronotum with 1+1 narrow brownish-yellow stripes on the submedian carinae, not attaining its apex, hemelytra with membrane cells darkened on the central portion and legs with an incomplete brownish-yellow ring on the apical half of the femora. Because the T. brasiliensis complex is of distinct epidemiological importance throughout its geographic distribution, a precise identification of its five members is important for monitoring and controlling actions against Chagas disease transmission.
ISSN:0074-0276
1678-8060
1678-8060
0074-0276
DOI:10.1590/0074-0276108062013016