Aspectos morfológicos de ovos de triatominae: II - Características macroscópicas e exocoriais de dez espécies do gênero Rhodnius Stal, 1859 (Hemiptera - Reduviidae)

Abstract

Foi realizado estudo morfológico do exocório de ovos de dez espécies de Rhodnius (Hemiptera-Reduviidae) através de microscopia eletrônica de varredura e microscopia óptica, com vistas à classificação taxionômica: Rhodnius domesticus Neiva & Pinto, 1923; R. ecuadoriensis Lent & León, 1958; R. nasutus Stal, 1859; R. neglectus Lent, 1954; R. neivai Lent, 1953; R. pallescens Barber, 1932; R. paraensis Sherlock, Guitton & Miles, 1977; R. pictipes Stal, 1972; R. prolixus Stal, 1859; e R. robustus, 1927. São apresentados dados sobre aspectos gerais das cascas e dos ovos quanto à forma, coloração e tamanho, bem como as modificações que poderão ocorrer quanto à coloração durante o desenvolvimento embrionário pós-oviposição. São elaboradas chaves dicotômicas para a classificação destas espécies, baseadas na utilização de caracteres visíveis pela microscopia óptica e microscopia eletrônica de varredura.

Morphological Studies on the Triatoma brasiliensis Neiva, 1911 (Hemiptera, Reduviidae, Triatominae) Genital Structures and Eggs of Different Chromatic Forms

“…Barata (1981), described the exochorion morphology of eggs, using light microscopy and SEM, from 10 species of the genus Rhodnius, being this the most important contribution.…”

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

“…There have also been reports of the presence of this species in Colombia and Venezuela (Carcavallo et al 1999. All these findings emphasize the importance of studies to promote greater knowledge of this species, and among these, studies of the ultrastructure of specimens coming from the Negro River.Morphological studies on triatomines, utilizing the resources of scanning electron microscopy, have been performed by several authors on different species and in relation to all stages of development (Lent & Wygodzinsky 1979, Barata 1981, Gonçalves et al 1985, Costa et al 1991, Galíndez Girón et al 1994, Silva et al 2003. These studies have made effective contributions towards the systematics of triatomines, through elucidation of the status of cryptic species and their complexes.…”

Morphological study of the eggs and nymphs of Triatoma dimidiata (Latreille, 1811) observed by light and scanning electron microscopy (Hemiptera: Reduviidae: Triatominae)

“…Barata (1981), Costa et al (1991) and Jurberg et al (1993) described generic characteristics, using the morphology of eggs for the genera Rhodnius, Cavernicola and Dipetalogaster, respectively. A great variability is present on the genera Alberprosenia, Cavernicola, Dipetalogaster, Eratyrus, Microtriatoma and Psammolestes, which facilitates the identification of each taxon.…”

“…Variations can occur and result from both natural and artificial causes, such as colony maintenance and nutrition (Barata et al 1980). Lizaraso (1957) concluded that populations of the same species, when provided with different laboratory and natural environments, could produce variations that affected the dimensions of the eggs without affecting the characteristics of the chorion, which remained constant.…”