Hermanlentia n. gen. of tribe Triatomini, with a list of species of Triatominae (Hemiptera, Reduviidae)

Hermanlentia n. gen. of Tribe Triatomini, with a List of Species of Triatominae (Hemiptera, Reduviidae) - Hermanlentia n. gen. was established in the tribe Triatomini, based on differences of external morphology, phallic structures and chromatic characters of Triatoma matsunoi Fernandez-Loayza 1989, in relation to other species of Triatoma. The head is long with disproportionally small eyes 1:0,16; the relation of the head and the pronotum is 1: 0,4; and the coloration of the hemelytron is whitish. Characters of the male genitalia that distinguish the new genus are the articulatory apparatus with twice the size of the aedeagus, phallosoma with fingerlike apex, 1 + 1 dorsal conjuntive processes with the inner edge toothed, and absence of endosoma process and vesica

Description of the allotype (Male) of Triatoma guazu Lent & Wygodzinsky, 1979 from the State of Mato Grosso, Brazil (Hemiptera, Reduviidae)

Description of the Allotype (Male) of Triatoma guazu Lent & Wygodzinsky, 1979 from the State of Mato Grosso, Brazil (Hemiptera, Reduviidae) - The authors decribe the allotype of Triatoma guazu Lent & Wygodzinsky, 1979 and make a morphological analysis, specially in the male external genitalia of samples recently found in Mato Grosso, Brasil, after the original description based on single specimen female from Paraguay

Resistance to fast of Triatoma nitida Usinger,1939 in laboratory (Hemiptera, Reduviidae, Triatominae)

Resistance to fast of Triatoma nitida Usinger,1939 in laboratory - The authors observed the resistance to the fast of Triatoma nitida in all phases of the life cycle. The nymphs of 1st and 2nd instars resisted about two months, and the 3rd ones more than three months and the 4th were more resistants (five months). The nymphs of 5th instar resisted for four months, and the adults about two months

Using modern landraces of wheat to study the origins of European agriculture

External Morphology of Triatoma rickmani Zeledon & Ponce, 1972 by Scanning Electron Microscopy - A male of Triatoma ryckmani, was studied by scanning electron microscopy

Biology of Rhodnius pictipes Stal, 1872 under laboratory conditions (Hemiptera, Reduviidae, Triatominae)

Biology of Rhodnius pictipes Stal, 1872 under laboratory conditions (Hemiptera, Reduviidae, Triatominae) - Rhodnius pictipes Stal, 1872 is a silvatic species with a widespread distribution in South America, found in nine Brazilian states, naturally infected by Trypanosoma cruzi and T. rangeli. The individual rearing of this species under laboratory conditions, allowed the following biological aspects to be observed: incubation time, search for first meal after eclosion or moult, time - lapse between presentation of the blood meal and the beginning of feeding, duration of blood meal, time and place of defecation, number of blood meals, duration of each instar and adult longevity, and time required from egg to adult

Biology of Triatoma nitida Usinger, 1939 under laboratory Conditions (Hemiptera: Reduviidae)

Biology of Triatoma nitida Usinger, 1939 under Laboratory Conditions -Triatoma nitida is a wild species occurring in Mexico and Central America. In order to establish the length of its life cycle and transmission potential, the following parameters were observed: the incubation period, the interval between hatching, or moulting, and the first feeding; the number of blood meals and the time of development. The time-lapse before the bite, the length of feeding and the interval between the end of the blood meal and defecation, as well as the site of defecation were also analyzed. Average length of the egg incubation period was 18.2 days. Time interval between the food source offering and the bite was less than 4 min in 60% of the analyzed cases, except in the fifth instar, where only 38% of the insects began feeding in less than 5 min. The blood-sucking period was long and rising until the fifth instar , decreasing in adults, and ranging from 1 min to 2 and a half hours. Only 26% of the blood meals were followed by defecations within 20 min. The average length of the life cycle was 897.5 days

Alguns aspectos da biologia de Triatoma pseudomaculata Correa & Espinola, 1964, em condicoes de laboratorio (Hemiptera:Reduviidae:Triatominae)

Biology of Triatoma pseudomaculata Correa & Espinola, 1964, under Laboratory Conditions (Hemiptera:Reduviidae:Triatominae) - Observations were made on the evolutive cycle of Triatoma pseudomaculata, held under laboratory conditions, fed weekly on bird (pigeon). Of 60 eggs obtained, only 34 nymphs reached the adult stage in a period of X(S)=398+/-76 days. The following parameters were observed: the time immature stages took to develop from egg to adult emergence; the occurrence of the first meal; the time-lapse between the presenting of the blood-meal and the begining of feeding; time of feeding; amount of blood ingested; variation of weight 24 hr after the blood-meal and until the next and the defecation pattern. The experiment was carried out for 20 months, held in BOD incubator with the average of temperature and humidity of 28+/-1 C and 80+/-5% RU, respectively

Morphologic study of Triatoma guazu Lent & Wygodzinsky, 1979 (Hemiptera, Reduviidae, Triatominae)

Morphologic Study of Triatoma guazu Lent & Wygodzinsky, 1979 (Hemiptera, Reduviidae, Triatominae) - A female of Triatoma guazu Lent & Wygodzinsky, 1979, a rare species from which the allotype was recently described, was studied by scanning electronic microscopy and videomicroscope. Some structures of the head and the thorax are shown. Some of them could have taxonomic importance, as the oculo-ocellar region, the buccula, the anterolateral angle of the collar, the scutellum, wings and the stridulatory sulcus, which has an unusual lateral high rim

Variations of the external male genitalia in three populations of Triatoma infestans Klug, 1834

Triatoma infestans is the triatomine that presents the greatest dispersion area in South America. However, it is not known whether the original characteristics of this insect remained in its long dispersion process. The purpose of this work was to study comparatively the external male genitalia of insects from different populations of T. infestans, two from Brazil (Minas Gerais and Bahia) and one from Bolivia (Cochabamba Valley), and to investigate the correlation between the morphological and behavioral variations. Differences were observed in one of the structures of the external genitalia (endosoma process) that could be used to characterize the insects from the three populations studied

Chromosomal characteristics and distribution of constitutive heterochromatin in the Matogrossensis and Rubrovaria subcomplexes

Since 1966 the triatomines were grouped in complexes and specific subcomplexes. Although the complex and subcomplexes not have taxonomic importance, should be monophyletic groups and cytogenetic tools have proved to be of great importance to characterize these species groupings. Based on this, this paper aims to describe the chromosomal characteristics and heterochromatic pattern of Matogrossensis and Rubrovaria subcomplexes, in order to contribute to the taxonomic and evolutionary relationships of these vectors. In this study, at least three males from each species (Triatoma baratai, Triatoma costalimai, Triatoma guazu, Triatoma jurbergi, Triatoma matogrossensis, Triatoma vandae, Triatoma williami, Triatoma carcavalloi, Triatoma circummaculata, Triatoma klugi, Triatoma pintodiasi and Triatoma rubrovaria) were analyzed by means analyzed by means of cytogenetic techniques of C-banding. All species showed the same cytogenetic characteristics: 22 chromosomes, low variation in the size of autosomes, sex chromosome Y larger than X, initial prophase composed of only one heterochromatic chromocenter formed by the sex chromosomes X and Y (except for T. pintodiasi that presented the sex chromosomes individualized during all stages of prophase) and presence of constitutive heterochromatin restricted to sex chromosome Y. These characteristics, although common to Matogrossensis and Rubrovaria subcomplexes allow to distinguish these species of species grouped in most of South America subcomplexes, as Brasiliensis, Maculata, Sordida and Insfestans. Thus, the cytogenetic analysis was of extreme importance to differentiate both subcomplexes of the other subcomplexes of South America. However, probably due to evolutionary proximity existing between these subcomplexes was not possible to observar species differences that make up the Matogrossensis subcomplex of the Rubrovaria subcomplex. Therefore, we emphasize that new comparative analyzes, as experimental hybrid crosses and molecular cytogenetic analysis are necessary to clarify the evolutionary relationship between these important subcomplexes of vectors. (C) 2015 Elsevier B.V. All rights reserved.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq