ABSTRACT
Four deutonymphs of bulb mites (hypopus) from Rhizoglyphus echinopus (Fumouze & Robin) (Acari: Acaridae) were found attached to the head of Atta sexdens in Rio de Janeiro, Brazil. This mite species is commonly associated with ornamental plants and trees with bulbs, corms and tubers. The results of this study provided an insight into the phoretic relationship between mites and ants, indicating the role of the latter in the dispersion of the first. Despite the abundant and diverse mite fauna existing in ants, little is known about their diversity, biology, ecology and the nature of their associations.(AU)
Quatro deutoninfas de ácaros do bulbo (hipopus) da espécie Rhizoglyphus echinopus (Fumouze & Robin) (Acari: Acaridae) foram encontradas fixadas na cabeça de formigas da espécie Atta sexdens no Rio de Janeiro, Brasil. Essa espécie de ácaro está comumente associada a plantas ornamentais e plantas com bulbos e tubérculos. Os resultados desse estudo fornecem uma visão sobre a relação forética entre ácaros e formigas, indicando o papel destas últimas na dispersão dos primeiros. Apesar da abundância e da fauna diversa do ácaro em formigas, pouco se sabe sobre a diversidade, a biologia, a ecologia e a natureza dessa associação.(AU)
Subject(s)
Ants , Medulla Oblongata , Mites , Arthropods , Agricultural Pests , Acaridae , Plant Tubers , InsectaABSTRACT
Chemical insecticides have been the main way to control synanthropic flies of medical and veterinary importance; however, residuals of these products have become a factor impacting on the environment, as well as the potential toxicological that they may cause damage to humans and domestic animals. Phytochemical screening carried out with the aqueous crude extract of Pouteria sapota (Jacq.) H.E. Moore & Stearn, Sapotaceae, leaves showed that coumarins, reducing sugars, flavonoids and cyanogenic glycosides were its most abundant metabolites. This study evaluated the activity of the crude aqueous extract of this plant on the post-embryonic development of Chrysomya putoria. Larvae treated with 5, 10 and 25% extract showed a decrease in the pupal period and in the newly-hatched larvae to adult period when compared to the control groups. Larvae from the 25% extract group were the lightest (45.8 mg) when compared with the control group (46.5 mg). The larval and newly-hatched larvae to adult stages were more sensitive to the leaf extract from P. sapota (5%) and the treated flies showed the low viability (47.5 and 45.5% respectively). The results demonstrated that topic treatment with P. sapota could alter C. putoria post embryonic development.
ABSTRACT
Water mites are common and widespread parasites of some aquatic insects in freshwater habitats. This is the first record of acari Arrenurus Dugès, 1834, as a parasite of Odonata in Brazil. Water mites were sampled from Miathyria marcella (Selys, 1857) and Ischnura fluviatilis (Selys, 1876).
Ácaros aquáticos são parasitas comuns de alguns insetos aquáticos em habitats de água doce. Este é o primeiro registro do ácaro Arrenurus Dugès, 1834, como parasita de Odonata no Brasil. Ácaros aquáticos foram coletados em Miathyria marcella (Selys, 1857) e Ischnura fluviatilis (Selys, 1876).
ABSTRACT
The Larva of Neocordulia machadoi is described and illustrated based on a exuvia collected at Cachoeira da Eubisose stream, São Tomé das Letras, Minas Gerais State, Brazil. With the discovery of this new larva, the number of known Corduliidae larvae is now eight for the Neotropical region.
A larva de Neocordulia machadoi é descrita e ilustrada com base em uma exúvia, coletada no riacho da Cachoeira da Eubiose, São Tomé das Letras, Estado de Minas Gerais, Brasil. Com a descoberta desta nova larva, o número de larvas de Corduliidae é agora oito para a região Neotropical.
ABSTRACT
A new species of Neocordulia is described and illustrated based on a reared male, collected at Cachoeira da Eubisose stream, São Tomé das Letras, Minas Gerais State, Brazil. The Holotype is deposited in the Museu Nacional, UFRJ, Rio de Janeiro, Brazil.
Uma nova espécie de Neocordulia é descrita e ilustrada com base em um macho obtido a partir de criação de ninfa, coletada no riacho da Cachoeira da Eubiose, São Tomé das Letras, Estado de Minas Gerais, Brasil. O Holótipo está depositado no Museu Nacional, UFRJ, Rio de Janeiro, Brasil.
ABSTRACT
Durante o período de 2005-2006 foram estudados os macroinvertebrados associados ao sistema radicular de Eichhornia crassipes (Mart.) Solms, 1883 na represa Chalons de Santiago de Cuba. A larva de Neoneura maria (Scudder, 1866), endêmica de Cuba, registrada para os três Setores da ilha, foi capturada constituindo o primeiro registro para a Província de Santiago de Cuba.
During the period 2005-2006 the macroinvertebrates associated with the root system of Eichhornia crassipes (Mart.) Solms, 1883 were studied in the overflow Chalons dam in Santiago de Cuba. The larva of Neoneura maria (Scudder, 1866), endemic for Cuba, reported to the three Sectors of the island, was collected and constitute the first report for the Província de Santiago de Cuba.