Embryology of Triatoma infestans (Klug), (Hemiptera, Reduviidae), a Chagas' disease vector

• Published in: Revista do Instituto de Medicina Tropical de São Paulo Vol. 34; no. 3; pp. 211 - 216
• Main Authors: FICHERA, L. E, RIARTE, A
• Format: Journal Article
• Language: English
• Published: São Paulo Instituto de Medicina Tropical de São Paulo 01.05.1992; Instituto de Medicina Tropical
• Subjects: Animals; Biological and medical sciences; Chagas Disease - parasitology; Fundamental and applied biological sciences. Psychology; Insect Vectors - embryology; Invertebrates; Medically important nuisances and vectors, pests of stored products and materials: population survey and control; Ovum - growth & development; Time Factors; Triatoma - embryology; TROPICAL MEDICINE; Vectors. Intermediate hosts; Heteroptera; Infection; Protozoal disease; Embryology; Triatoma infestans; Arthropoda; Insecta; Chagas disease; Invertebrata; Trypanosomiasis; Vector; Reduviidae; Insects; Triatominae, embryology
• ISSN: 0036-4665; 1678-9946; 1678-9946; 0036-4665
• DOI: 10.1590/S0036-46651992000300005

This study reports the embryogenesis of T. infestans (Hemiptera, Reduviidae). Morphological parameters of growth sequences from oviposition until hatching (12-14 d 28 degrees C) were established. Five periods, as percent of time of development (TD), were characterized from oviposition until hatching. The most important morphological features were: 1) formation of blastoderm within 7% of TD; 2) germ band and gastrulation within 30% of TD; 3) nerve cord, limb budding, thoracic and abdominal segmentation and formation of body cavity within 50% of TD; 4) nervous system and blastokinesis end, and development of embryonic cuticle within 65% of TD; 5) differentiation of the mouth parts, fat body, and malpighian tubules during final stage and completion of embryo at day 12 to day 14 around hatching. These signals were chosen as appropriate morphological parameters which should enable the evaluation of embryologic modifications due to the action/s of different insecticides.