ABSTRACT
The oliveirai complex is actually composed of nine related species of Triatominae that occur in the Pantanal ecosystem of Mato Grosso, Brazil. In order to confirm their specific status and infer their phylogenetic relationships, we performed a genetic and morphometric comparison concerning seven of the nine species of the complex. Isoenzyme analysis provided broadly similar phylogenetic information to that derived from discriminant analysis of size-free variables. The derived trees reveal two main species groups, one composed of three closed species (T. jurbergi, T. matogrossensis and T. vandae), and another one subdivided into two different pairs, the T. guazu-T. williami pair and the T. klugi-T. oliveirai pair. The results call the specific status of T. guazu and T. williami into question, support the possibility that the other analyzed species represent distinct taxa and query the existence of the oliveirai complex.
Subject(s)
Phylogeny , Triatominae/genetics , Animals , Brazil , Isoenzymes/genetics , Sequence Analysis, DNA , Triatominae/classification , Triatominae/enzymologyABSTRACT
Panstrongylus rufotyberculatus is reported for the first time in Argentina. Four adults were attracted by the light of human dwellings in Calilegua National Park, Jujuy, at 1150 masl within the subtropical humid forest. The indiviluals were similar to those described in the literature. The epidemiological significance of this species is very low in the area, although deforestation might increase its role in the transmission of Trypanosoma cruzi.
Subject(s)
Animals , Disease Vectors , Chagas Disease/epidemiology , Insect Vectors , PanstrongylusABSTRACT
Triatoma jurbergi, n. sp. is described based on nine specimens of both sexes deposited in Rodolfo Carcavallo Collection in the Oswaldo Cruz Institute Entomological Collection. The new species can be separated from the closely related Triatoma guazu Lent & Wygodzinsky, 1979 by several characters. The must important are longer anteocular region; thin and pointed juga; the shape of the eyes without concavity in the posterior edge; much longer second rostral segment, passing the posterior edge of eyes; the absence of a ventral longitudinal depression on the abdomen; the general color redish, brown and orange and the male genitalia, mainly in the vesica lightly chitinized and smaller, the phallosome with apical projection and the pointed apex of the endosome process.
Subject(s)
Animals , Triatoma/anatomy & histology , BrazilABSTRACT
Triatoma infestans melanosoma was described in 1987 by Martinez, Olmedo & Carcavallo. In the present work the authors make a redescription, adding new characters, and based on biological and morphological aspects raise up to the level of species and being identified as Triatoma melanosoma. A detailed morphological study of the external male genitalia was made.