The fine structure of the ocelli of Triatoma infestans (Hemiptera: Reduviidae)

The morphology and fine structure of the ocelli of Triatoma infestans have been analyzed by means of light and electron microscopy. The two dorsal ocelli of this species are located behind the compound eyes, looking dorsally and frontally. Externally, the ocelli are marked by the corneal lenses virt...

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Autor principal: Insausti, T.C
Otros Autores: Lazzari, C.R
Formato: Capítulo de libro
Lenguaje:Inglés
Publicado: Elsevier Ltd 2002
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100 1 |a Insausti, T.C. 
245 1 4 |a The fine structure of the ocelli of Triatoma infestans (Hemiptera: Reduviidae) 
260 |b Elsevier Ltd  |c 2002 
270 1 0 |m Insausti, T.C.; Depto. de Biodivers. y Biol. Exp., Facultad de Cs Exactas y Naturales, Universidad de Buenos Aires, C1428EHA Buenos Aires, Argentina; email: tere@bg.fcen.uba.ar 
506 |2 openaire  |e Política editorial 
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520 3 |a The morphology and fine structure of the ocelli of Triatoma infestans have been analyzed by means of light and electron microscopy. The two dorsal ocelli of this species are located behind the compound eyes, looking dorsally and frontally. Externally, the ocelli are marked by the corneal lenses virtually spherical in form and limited internally by a cuticular apodeme. The lens focuses the incoming rays beyond the retina. A single layer of corneagen cells lies below the cuticular lens. The corneagen cells and photoreceptors are arranged in a cup-like fashion beneath the cuticular lens. A distal retinal zone comprises the rhabdoms, which are laterally connected in an hexagonal meshwork. A middle retinal zone comprises the receptor cell segment free of rhabdom, and a proximal zone their axons. In the middle zone, the oviform nuclei and spheroids are located. Screening pigment granules are present within the retinal cell. Spherical mitochondria are homogeneously distributed in the cytoplasm of the cell body. In the axonal zone, mitochondria are found in the peripheral region. Axons from receptor cells extend into the ocellar neuropile at the base of the ocelli, to synapse with second order neurons. The large axons of second order neurons are bundled by glial cells. The ocellar plexus exhibits a high diversity of synaptic unions (i.e. axo-dendritic, axo-axonic, dendro-axonic, and dendro-dendritic). © 2002 Elsevier Science Ltd. All rights reserved.  |l eng 
536 |a Detalles de la financiación: Universidad de Buenos Aires 
536 |a Detalles de la financiación: Consejo Nacional de Investigaciones Científicas y Técnicas 
536 |a Detalles de la financiación: This work received financial support from the University of Buenos Aires, CONICET (Argentina) and the WHO/UNDP/World Bank Special Programme for Research and Training in Tropical Diseases (TDR). 
593 |a Depto. de Biodivers. y Biol. Exp., Facultad de Cs Exactas y Naturales, Universidad de Buenos Aires, C1428EHA Buenos Aires, Argentina 
690 1 0 |a INSECT 
690 1 0 |a OCELLI 
690 1 0 |a TRIATOMA INFESTANS 
690 1 0 |a TRIATOMINAE 
690 1 0 |a ULTRASTRUCTURE 
690 1 0 |a ARTICLE 
690 1 0 |a CELL NUCLEUS 
690 1 0 |a CELL SCREENING 
690 1 0 |a CORNEA 
690 1 0 |a CORNEA CELL 
690 1 0 |a CYTOPLASM 
690 1 0 |a ELECTRON MICROSCOPY 
690 1 0 |a EYE 
690 1 0 |a GLIA CELL 
690 1 0 |a HEMIPTERA 
690 1 0 |a INSECT 
690 1 0 |a LENS 
690 1 0 |a MALE 
690 1 0 |a MITOCHONDRION 
690 1 0 |a MORPHOLOGY 
690 1 0 |a NERVE CELL 
690 1 0 |a NERVE FIBER 
690 1 0 |a NEUROPIL 
690 1 0 |a NONHUMAN 
690 1 0 |a OCELLI 
690 1 0 |a PHOTORECEPTOR 
690 1 0 |a REDUVIIDAE 
690 1 0 |a RETINA 
690 1 0 |a RETINA CELL 
690 1 0 |a SPHEROID CELL 
690 1 0 |a SYNAPSE 
690 1 0 |a TENDON 
690 1 0 |a TRIATOMA INFESTANS 
690 1 0 |a TRIATOMINAE 
690 1 0 |a ULTRASTRUCTURE 
690 1 0 |a HEMIPTERA 
690 1 0 |a INSECTA 
690 1 0 |a REDUVIIDAE 
690 1 0 |a TRIATOMA 
690 1 0 |a TRIATOMA INFESTANS 
690 1 0 |a TRIATOMINAE 
650 1 7 |2 spines  |a VISION 
650 1 7 |2 spines  |a VISION 
700 1 |a Lazzari, C.R. 
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