ABSTRACT
Feeding patterns of mosquitoes in six Brazilian environmental preservation areas were analyzed by the precipitin technique. The mosquito populations were captured using Shannon traps during different time periods. Bird, cow, dog, horse, opossum, human, and rodent antisera diagnostic tests were employed and results were analyzed by calculating the Sørensen similarity index and using the null-model test. Of the 647 analyzed specimens, 443 reacted to the utilized antisera, of which 331 reacted to one blood source, with the most frequent being birds (49.4%); and 112 specimens reacted to two blood sources, with the most frequent combination from birds + rodents (14.3%). The feed profiles demonstrated that Anopheles albitarsis, An. evansae, Aedes fulvus, Psorophora albigenu, Ps. albipes, Ps. ferox, and Mansonia titillans fed predominantly on birds. The similarity index showed that in some localities An. cruzii, Chagasia fajardi, Ae. scapularis, Ae. serratus, Haemagogus leucocelaenus, Ps. albigenu, and Ps. ferox presented similar dietary habits. The null-models test indicated that species from SMSP, INP, CGNP, and THP demonstrated an aggregate pattern, while species from SONP and SBNP showed a random pattern. The mosquitoes fed predominantly on birds, but from an epidemiological standpoint, the eclectic feeding habits were found to be constant among the mosquitoes analyzed.
Subject(s)
Culicidae/physiology , Feeding Behavior/physiology , Animals , Brazil , Models, TheoreticalABSTRACT
Eggs of Psorophora albigenu were analyzed by light and scanning electron microscopy. Eggs were laid singly and were black and elliptical in outline. A length of approximately 586.4 ± 10.83 µm, a width of 172.3 ± 8.09 µm (n=30), and an egg index (length/width ratio) of 3.33 were observed. The anterior extremity tapered abruptly from a width of 64.9 µm, while such tapering was more gradual at the posterior extremity from a width of 77.4 µm. The ventral surface of the chorionic coating presented cells with tubular aspect containing tubercles in rows with a density of 9-16 tubercles per cell. These tubercles presented two different sizes, with the largest measuring 7.87 ± 01.58 µm and the smallest measuring 0.71 ± 0.53 µm (n=30) in longitudinal diameter. The micropyle orifice was very evident, with a diameter of 3.36 µm. The morphometric characteristics of Ps. albigenu obtained in this study were distinct from those of other species of the Psorophora genus, including Psorophora varipes which has been considered for a long time to be synonymous with Ps. albigenu.
Subject(s)
Culicidae/ultrastructure , Ovum/ultrastructure , Animals , Female , MicroscopyABSTRACT
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
Diversity of Odonata (Insecta) in lotic systems from Serra da Bodoquena, Mato Grosso do Sul State, Brazil. A systematic survey was carried out in four lotic systems from Serra da Bodoquena, the largest natural forests of the State, from August 2007 to November 2008. 548 specimens belonging to 33 species, distributed in 5 families were sampled. Libellulidae was dominant, with 13 species, followed by Gomphidae, Coenagrionidae, Protoneuridae and Calopterygidae.
Diversidade de Odonata (Insecta) em sistemas lóticos da Serra da Bodoquena, Mato Grosso do Sul, Brasil. Um estudo sistemático foi realizado em quatro sistemas lóticos da Serra da Bodoquena, maior extensão de florestas naturais do estado, de Agosto de 2007 a Novembro de 2008. Foram coletados 548 espécimes pertencentes a 33 espécies, distribuídas em 5 famílias. Libellulidae foi dominante, com 13 espécies, seguida por Gomphidae, Coenagrionidae, Protoneuridae e Calopterygidae.
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
Coleção de Tipos de Plecoptera (Insecta) do Museu Nacional (UFRJ), Rio de Janeiro, Brasil. A Coleção de Tipos de Insetos do Museu Nacional inclui 3.263 espécimes dos quais 57 são da ordem Plecoptera (2 holótipos, 1 alótipos e 54 parátipos), pertencentes às famílias Gripopterygidae e Perlidae. O estado de preservação dos tipos e as coordenadas geográficas das localidades de coleta são fornecidas.
Types of Plecoptera (Insecta) in the collection of the National Museum (UFRJ), Rio de Janeiro, Brazil. The Insect Type Collection of National Museum contains 3,263 specimens of which 57 are in the Order Plecoptera (2 holotypes, 1 allotypes, 54 paratypes), belonging to families Gripopterigydae and Perlidae. The state of preservation of types and geographical coordinates of the collection localities are provided.
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.
ABSTRACT
Mosquitoes of the genus Haemagogus are important vectors of yellow fever virus and other arboviruses and are the principal reservoirs of these viruses in nature. Haemagogus capricornii and Haemagogus janthinomys are closely related species between which females are morphologically cryptic. A morphometric study of these species was performed on male and female specimens from 14 municipalities in Brazil. Morphometric analyses were able to distinguish females. Multivariate morphometrics may be a useful tool for taxonomic studies of cryptic species in this group.
Subject(s)
Culicidae/virology , Yellow Fever/transmission , Yellow fever virus , Animals , Culicidae/anatomy & histology , Culicidae/classification , Female , Male , Multivariate Analysis , Species SpecificityABSTRACT
Registra-se o encontro de Aedes albopictus Skuse, 1894, na praia do Sino, ilha da Marambaia (CADIM), Mangaratiba, RJ, em um recipiente artificial (copo plástico) sobre uma pedra na beira da praia. Ressalta-se a sua importância epidemiológica e ecológica.
Subject(s)
Aedes , Dengue/epidemiology , Yellow Fever/epidemiology , Environmental Health , Brazil/epidemiologyABSTRACT
Ten species of Culicoides Latreille are reported for the first time from Peruvian Departments of Amazonas, Cajamarca, Loreto, Madre de Dios, Piura and San Martin. The synonymy and distribution of the species in the New World are given.
Dez espécies de Culicoides Latreille são reportadas pela primeira vez para os departamentos peruanos de Amazonas, Cajamarca, Loreto, Madre de Dios, Piura e San Martin. A sinonímia e a distribuição das espécies para o novo mundo são fornecidas.
Subject(s)
Diptera/classification , Diptera/growth & development , Fauna/analysis , Ecosystem/analysis , Ecosystem/classification , Insecta/anatomy & histology , Insecta/classificationABSTRACT
Haemagogus tropicalis is strictly a forest-dwelling species from the fertile valley area of the Amazônia forest. It is a diurnal mosquito, and the oviposition sites for the species include tree holes. The eggs of Hg. tropicalis used in this study were from females captured on Combú Island, situated across from the city of Belém, Guajará Bay, state of Pará, at 1 degrees 25'S latitude and 48 degrees 25'W longitude. The eggs are elliptical and approximately 575 microm long with a width of approximately 144 microm. The ventral surface of the chorionic reticulum has regular chorionic cells with hexagonal and sometimes pentagonal ornamentation. Each chorionic cell has a thick external chorionic reticulum with regular borders. The interior of the chorionic cells have small, evenly distributed tubercles, and the dorsal external chorionic reticulum appears porous. The micropylar apparatus, located on the anterior area of the egg, was formed by a collar with a well-developed frame. Centrally, the micropylar disc had a diameter of approximately 20 microm and the micropylar orifice is 2.1 microm in diameter. These data may enable construction of taxonomic keys for identifying eggs of Haemagogus species.
