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vol.95 número6In vitro activity of Brazilian strains of the predatory fungi Arthrobotrys spp. on free-living nematodes and infective larvae of Haemonchus placeiComparative developmental and susceptibility to insecticide of Bolivian and Brazilian populations of Triatoma infestans índice de autoresíndice de assuntospesquisa de artigos
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Memórias do Instituto Oswaldo Cruz

versão impressa ISSN 0074-0276versão On-line ISSN 1678-8060


INSAUSTI, Teresita C  e  LAZZARI, Claudio R. The postembryonic development of the ocellar system of Triatoma infestans Klug (Heteroptera: Reduviidae). Mem. Inst. Oswaldo Cruz [online]. 2000, vol.95, n.6, pp.877-881. ISSN 0074-0276.

Simple eyes or ocelli coexist with compound eyes in many adult insects. The change in the morphology of the ocelli along the five larval instars of Triatoma infestans was studied by light and scanning electron microscopy. Our analysis showed that the development of the ocelli of these bugs occurs gradually along the larval life. The photoreceptor layer is present from the second-instar onwards. The cornea appears first at the imaginal stage and grows up to the 18-20th day after the last ecdysis, associated to an increase in the retinal mass. Findings are discussed in a comparative fashion and in relation to the functionality of the ocellar system in T. infestans.

Palavras-chave : Triatoma infestans; ocelli; development; Chagas disease.

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