Descrição de ovos e estádios ninfais de Triatoma carcavalloi (Hemiptera, Reduviidae) por meio de microscopia óptica

Abstract

ABSTRACT. Description of eggs and nymphs of Triatoma carcavalloi through optical microscopy. Triatoma carcavalloi Jurberg, Rocha & Lent, 1998 in its original description was related to T. rubrovaria (Blanchard, 1843) and T. circummaculata (Stäl, 1859). Here eggs and nymphs of T. carcavalloi are described using optical microscopy to provide new parameters to be used in Triatominae's taxonomy. Eggs showed the operculum and surface with pentagonal and hexagonal cells, with small fractures and punctuations randomly distributed and are similar to T. rubrovaria, T. circummaculata and T. infestans Klug, 1834. Nymphs are different from all species related to T. carcavalloi primordially in color and size. Morphological differences were found in the five nymphal stages, but following the same pattern of color in head, thorax, legs and abdomen. KEYWORDS.Chagas disease, vectors, Triatominae, taxonomy, external morphology. RESUMO.Triatoma carcavalloi Jurberg, Rocha & Lent 1998, foi descrita como espécie afim de T. rubrovaria (Blanchard, 1843) e T. circummaculata (Stäl, 1859). São descritos os ovos e ninfas de T. carcavalloi por meio de microscopia óptica para fornecer novos parâmetros a serem utilizados na taxonomia dos Triatomímeos. Os ovos apresentam semelhanças com T. rubrovaria, T. circummaculata e T. infestans Klug, 1834, com ornamentações tanto na superfície como no opérculo, com células pentagonais e hexagonais, com pequenas fraturas e pontuações distribuídas de forma aleatória. As ninfas se diferenciam de todas as espécies a ela relacionadas, principalmente pela coloração e tamanho. Cada um dos cinco estádios ninfais apresenta diferenças morfológicas, no entanto, o padrão de coloração da cabeça, tórax, pernas e abdômen se mantêm, em todos os estádios.

Characterization of Female External Genitalia and Eggs of Four South American Species of the Triatoma Laporte, 1832 Genus (Hemiptera: Reduviidae: Triatominae)

“…The results show that the eggs of T. patagonica are the ones that present the greatest morphological and morphometric differences, the elongated profile is similar to the published descriptions for eggs of the species Triatoma rubrovaria (Blan-chard, 1846) and Triatoma klugi Jurbergi, Lent and Galvão, 2001 [34,35]. The approximate average length of the T. guasayana eggs are like those described for Triatoma circummaculata (Stål, 1859) and Triatoma carcavalloi Jurberg, Rocha and Lent, 1998, species of the T. rubrovaria subcomplex [34,36]. It was also possible to show that the morphology of T. sordida sensu stircto eggs is similar to the morphology of T. matogrossensis Leite e Barbosa, 1953; T. vandae Carcavallo et al, 2002 and T. jurbergi Carcavallo, Galvão and Lent, 1998 [36][37][38].…”

“…The approximate average length of the T. guasayana eggs are like those described for Triatoma circummaculata (Stål, 1859) and Triatoma carcavalloi Jurberg, Rocha and Lent, 1998, species of the T. rubrovaria subcomplex [34,36]. It was also possible to show that the morphology of T. sordida sensu stircto eggs is similar to the morphology of T. matogrossensis Leite e Barbosa, 1953; T. vandae Carcavallo et al, 2002 and T. jurbergi Carcavallo, Galvão and Lent, 1998 [36][37][38]. Triatoma matogrossensis, T. vandae, and T. jurbergi were recently inserted together with the T. sordida subcomplex [7,8].…”

“…The evaluation of the eggs exochoria by SEM reveals an ornamentation with homogeneous geometric shapes, a common characteristic of the Triatoma genus as demonstrated by Barata [27]. In Triatomines, eggs have been explored in different approaches and have been shown to be an excellent taxonomic character [34,[36][37][38]. The distinct sublayers of the chorion were first described by Beament [40] used eggs of Rhodnius prolixus Stål, 1859.…”

Description of the nymphs of Triatoma pintodiasi Jurberg, Cunha & Rocha, 2013 (Hemiptera: Reduviidae: Triatominae)

“…Discal tubercles are visible on second to fifth instar nymphs of T. carcavalloi, but are absent from all instars in T. pintodiasi. Still according to Jurberg et al (2008), body lengths of first to fifth instar nymphs of T. carcavalloi are respectively 2.85 mm, 5.13 mm, 5.47 mm, 7.67 mm, and 10.69 mm. Being so, nymphs of T. pintodiasi (Table I) are shorter than those of T. carcavalloi, like the adults of these species.…”