Abstract
Triatoma jatai sp. nov. is the first new species of triatomine to be described in the state of Tocantins, in the northern region of Brazil. It was caught on rock outcrops in the wild environment and, more recently, invading homes. While T. jatai sp. nov. is morphologically similar to Triatoma costalimai, it is distinguished by its general colouring, differences in the blotches on the connexivum, wing size in females and external structures of the male genitalia. The type series has been deposited in the Entomological Collection and Herman Lent Collection, Oswaldo Cruz Institute-Oswaldo Cruz Foundation, Rio de Janeiro, Brazil.
Highlights
The state of Tocantins (TO) is located in the northern region of Brazil; 91% of its territory is formed by the Cerrado biome and the remaining 9% by the Amazonian biome (IBGE 2004)
T. costalimai from Aurora do Tocantins and Triatoma williami obtained from the National Laboratory and International Reference on Taxonomy of Triatominae (LNIRTT), Oswaldo Cruz Foundation (Fiocruz), Rio de Janeiro (RJ), Brazil, were used to comparison
In the municipalities of Ponte Alta do Bom Jesus, Taguatinga, Aurora do Tocantins and Paranã, specimens of T. costalimai infected with Trypanosoma cruzi (Chagas 1909) were collected from wild environments among volcanic rock outcrops
Summary
The state of Tocantins (TO) is located in the northern region of Brazil; 91% of its territory is formed by the Cerrado (savanna-like) biome and the remaining 9% by the Amazonian biome (IBGE 2004). The southern and southeastern regions of TO, which are considered to be endemic for Chagas disease, are within the Cerrado biome and are composed of a variety of vegetation types, such as cerrado (lightly wooded savanna-like terrain), cerradão (more heavily wooded savanna-like terrain), park-like terrain, campo limpo (savanna grassland) and campo rupestre (rocky open terrain) This last type consists of large numbers of calcareous rock outcrops scattered across the region that form the so-called “limestone scrub”, which has the capacity to provide shelter for triatomine fauna and its food sources. Specimens of Triatoma costalimai Verano & Galvão, 1959 have been caught in the municipalities of Aurora do Tocantins and Paranã, located in the southeast and south of the state This species is included in the species subcomplex matogrossensis, according to its molecular and biogeographical characteristics (Schofield & Galvão 2009). The morphology and the morphometric geometric of wings are studied and described as bellowing to a new species of the genus Triatoma Laporte, 1832 and proposed a new taxonomic key for Triatoma matogrossensis subcomplex based on Obara et al (2012)
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