Morfologia dos ovos e tegumento de Harpactor angulosus (Lepeletier & Serville, 1825) (Hemiptera: Reduviidae)

• Autor(a) principal: Pikart, Tiago Georg
• Data de Publicação: 2011
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: http://locus.ufv.br/handle/123456789/3928
• topic: Percevejo predador; Harpactorinae; Reduviidae; Morfologia; Ovos; Cutícula embrionária; Cera; Epiderme glandular; Glândula tegumentar; Lipídios; Bug Predator; Harpactorinae; Reduviidae; Morphology; Eggs; Embryonic cuticle; Wax; Glandular epidermis; Integumentary gland; Lipids; CNPQ::CIENCIAS BIOLOGICAS::BIOLOGIA GERAL

Harpactor angulosus (Lepeletier and Serville, 1825) (Reduviidae: Harpactorinae) is a generalist predator endemic from the America and has been found feeding on larvae of Lepidoptera pests of Eucalyptus. Data about the biology and behavior of this predator are fragmented and its eggs were described superficially. This species presents from the third instar wax particles covering the body segments resulting in a gray coloration for the insect. This study described the morphology of H. angulosus eggs and integument and determined the chemical composition of the wax. Newly-laid eggs of H. angulosus have brown color and translucent aspect, but during the embryonic development they acquire a black color. The egg are oval with a slight lateral flattening, egg shell surface presents several pores, the posterior pole is rounded and an anterior neck region, chorionic rim and anterior appendage can be differentiated in the anterior pole. The anterior pole has externally the neck region poorly pronounced, without formation of the collar and with a reduced chorionic rim, and a large sealing inner bar. Anterior appendage of H. angulosus eggs is incomplete, without connection between the veil and opercular projection. Aeropyles has a tubule-like shape arising in the middle region of the veil and extending until the inner sealing bar. The operculum, after the insect hatching was circular and the outer surface was formed by a reticulated foliar porous projection with variable size. Harpactor angulosus nymphs left an embryonic molt inside the egg after hatching, were specialized structures that aid the hatching process, such as teeth or spines are lacking. Embryonic ecdysis occurred in H. angulosus in seven days old embryos. Integument of H. angulosus nymphs and adults have not specialized structures for wax release, which has a filament-like aspect. Epidermis of nymphs from the third to fifth instar and adults, all of them with 24 and 72 hours after emergence, has a single layer of columnar cells, whereas epidermis from first and second instar nymphs, both with 24 and 72 hours after emergence, shows flattened epidermis. The epidermis has few carbohydrate and protein and contents. But the epidermal cell morphology, the lipid nature of the chemical components found in H. angulosus wax and the presence of lipid granules suggest the lipid metabolism in the epidermis of nymphs from the third to fifth instar and adults, all of them with 24 and 72 hours after emergence.