Morfologia externa de Triatoma ryckmani Zeledón & Ponce, 1972 vista através da microscopia eletrônica de varredura

Abstract

External Morphology of Triatoma rickmani Zeledón & Ponce, 1972 by Scanning Electron Microscopy -A male of Triatoma ryckmani Zeledón & Ponce, 1972, was studied by scanning electron microscopy. Only few specimens of this species are known. In this paper, some structures from the head, thorax, abdomen and distal region of the second leg are shown. Some of them could have taxonomic importance, as the oculo-ocellar region, the buccula, the anterolateral angle of the collar, the scutellum with the process longer than the main body, the stridulatory sulcus with an unusual backward vermiform area, and the tibia-tarsal articulation, with a spongy fossula. The last structure was absent in specimens previously studied (Lent & Wygodzinsky 1979). Differences between this specimen and others previously described by several authors are dicussed.

Morphobiological aspects of Rhodnius brethesi Matta, 1919 (Hemiptera:Reduviidae) from the Upper and Middle Negro River, Amazon region of Brazil: I - scanning electron microscopy

“…Structures like the stridulatory sulcus, buccula and rostrum were highlighted by Carcavallo et al (1996), Silva et al (2003), Ferro et al (1997Ferro et al ( , 1998 Preliminary studies on the external morphology of R. brethesi at an ultrastructural level utilizing scanning electron microscopy have been performed on the structures of the head, thorax and feet of nymphs and adults (Ferro et al 1997, Andrade et al 2002.…”

“…The first descriptions of the external morphology of R. brethesi using optical microscopy were based on adult specimens (Matta 1919(Matta , 1922. The eggs, nymph stages and life cycle were described by Mascarenhas in 1982Mascarenhas in , 1987Mascarenhas in , and 1990 Other studies related to the external morphology, including in relation to the male and female genitalia, were performed using optical microscopy by Lent (1948), Lent and Jurberg (1969), and Lent and Wygodzinky (1979).Structures like the stridulatory sulcus, buccula and rostrum were highlighted by Carcavallo et al (1996), Silva et al (2003), Ferro et al (1997Ferro et al ( , 1998 Preliminary studies on the external morphology of R. brethesi at an ultrastructural level utilizing scanning electron microscopy have been performed on the structures of the head, thorax and feet of nymphs and adults (Ferro et al 1997, Andrade et al 2002.With aim of obtaining better knowledge of R. brethesi, a morphological analysis was performed on the head (anterior ocular region, ocular-ocellar region, antennae, buccula and rostrum), thorax (stridulatory sulcus) and feet (apex of the tibia, spongy fossette, ctenidium, and tarsus) of adults of this species. …”

“…Structures like the stridulatory sulcus, buccula and rostrum were highlighted by Carcavallo et al (1996), Silva et al (2003), Ferro et al (1997Ferro et al ( , 1998, Andrade et al (2002), and Silva et al (2003) as having taxonomic importance in aiding in differentiating between populations existing within the same areas.…”

Life cycle of Triatoma ryckmani (Hemiptera: Reduviidae) in the laboratory, feeding patterns in nature and experimental infection with Trypanosoma cruzi

“…The first male specimen was found near the town of Santa Cruz, Guanacaste Province of Costa Rica (Sherlock & Morera 1988). Carcavallo et al (1996) did an external morphological study, with scanning electron microscopy, of another male specimen, collected in Santa Rosa, Guanacaste Province, Costa Rica. More recently, the natural habitats of T. ryckmani were discovered in a semiarid region of El Progreso Department, Guatemala, in cacti (Stenocercus eichlamii) and epiphytic bromeliads (Tillandsia xerographica).…”

A study of the scutellum in eight Chagas disease vector species from genus Triatoma (Hemiptera, Reduviidae) using optical and scanning electron microscopy

“…Carcavallo et al (1996) used scanning electron microscopy (SEM) to view details in the shape and proportions of the scutellum in Triatoma ryckmani Zeledón & Ponce, 1972, thus expanding the systematic and taxonomic knowledge of this species. Galíndez-Girón et al (1997a) also used SEM to focus on the structural characteristics of the scutellum in Triatoma guazu Lent & Wygodzinsky, 1979, proposing the inclusion of these pattern variations in future dichotomous keys.…”