Description of Rhodnius marabaensis sp. n. (Hemiptera, Reduviidae, Triatominae) from Pará State, Brazil.

João Aristeu Da Rosa,Eder Dos Santos Souza,Maria Betânia Furtado,Juliana Damieli Nascimento,Daniel Pagotto Vendrami,Jader De Oliveira,Noé Carlos Barbosa Von Atzingen,Sueli Gardim

doi:10.3897/zookeys.621.9662

João Aristeu Da Rosa, Eder Dos Santos Souza + Show 6 more

Open Access

https://doi.org/10.3897/zookeys.621.9662

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Abstract

Rhodnius marabaensis sp. n. was collected on 12 May 2014 in the Murumurú Environmental Reserve in the city of Marabá, Pará State, Brazil. This study was based on previous consultation of morphological descriptions of 19 Rhodnius species and compared to the identification key for the genus Rhodnius. The examination included specimens from 18 Rhodnius species held in the Brazilian National and International Triatomine Taxonomy Reference Laboratory in the Oswaldo Cruz Institute in Rio de Janeiro, Brazil. The morphological characteristics of the head, thorax, abdomen, genitalia, and eggs have been determined. Rhodnius prolixus and Rhodnius robustus were examined in more detail because the BLAST analysis of a cyt-b sequence shows they are closely related to the new species, which also occurs in the northern region of Brazil. The most notable morphological features that distinguish Rhodnius marabaensis sp. n. are the keel-shaped apex of the head, the length of the second segment of the antennae, the shapes of the prosternum, mesosternum and metasternum, the set of spots on the abdomen, the male genitalia, the posterior and ventral surfaces of the external female genitalia, and the morphological characteristics of the eggs. Rhodnius jacundaensis Serra, Serra & Von Atzingen (1980) nomen nudum specimens deposited at the Maraba Cultural Center Foundation - MCCF were examined and considered as a synonym of Rhodnius marabaensis sp. n.

Highlights

Vectors of the protozoan Trypanosoma cruzi, the etiological agent of Chagas disease, include 151 species distributed into 18 genera belonging to the subfamily Triatominae (Galvão 2014, Mendonça et al 2016)
The same haplotype was shown with 693 base pairs. This sequence was evaluated by BLAST to diagnose the homologous sequences in GenBank. In view of this and of the fact that all three species occur in Northern Brazil (Galvão et al 2003, Galvão 2014), R. robustus and R. prolixus were morphologically examined and compared in more detail
The molecular study shown the same haplotype for the find sequences of the cyt-b (693 bp) and the evaluation by BLAST have shown that R. marabaensis sp. n. is closely related to R. robustus and R. prolixus

Summary

Introduction

Vectors of the protozoan Trypanosoma cruzi, the etiological agent of Chagas disease, include 151 species distributed into 18 genera belonging to the subfamily Triatominae (Galvão 2014, Mendonça et al 2016). The genus Rhodnius includes 19 species (Alevi et al 2015), of which six were described after the publication of the Lent and Wygodzinsky review (1979): R. stali Lent, Jurberg & Galvão, 1993; R. colombiensis Mejia, Galvão & Jurberg, 1999; R. milesi (Carcavallo, Rocha, Galvão & Jurberg, 2001); R. zeledoni Jurberg, Rocha & Galvão, 2009; R. montenegrensis Rosa et al, 2012, and R. barretti Abad-Franch, Palomeque & Monteiro, 2013. In May 2014, two Rhodnius spp. specimens were collected in Marabá, Pará, Brazil, and compared to the key described by Lent and Wygodzinsky (1979), as well as to previously described Rhodnius species, without success These samples were compared and identified as the same species as Rhodnius jacundaensis Serra, Serra & Von Atzingen, 1980 which had been deposited at the Marabá Cultural Center in Pará. This article describes Rhodnius marabaensis sp. n. as the tenth species found in northern Brazil and the twentieth member of this genus (Abad Franch et al 2013, Galvão 2014, Meneguetti et al 2014, Alevi et al 2015)

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