Eutrombicula alfreddugesi is prevalent across eastern and central North America. There is also evidence of E. alfreddugesi scattered across Central and South. Abstract. I collected larvae of Eutrombicula alfreddugesi for the first time parasitizing Gerrhonotus infernalis, Sceloporus poinsetti, S. jarrovii, and S. grammicus. Padrões de parasitismo por Eutrombicula alfreddugesi (Oudemans) (Acari, Trombiculidae) em três espécies de Tropidurus Wied (Squamata, Tropiduridae) do.

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These eggs develop one at a time within the female body; however, eggs laid at different times can still develop and hatch together. The body of Eutrombicula alfreddugesi has a gnathosoma and an idiosoma. Here we discuss the patterns of parasitism by larvae alfrefdugesi Eutrombicula alfreddugesi on three species of Tropidurus Wied, from Cerrado habitat of Central Brazil, evaluating parameters such eutrkmbicula the intensity and prevalence of parasitism, and parasite distribution over the hosts’ bodies.

Receive exclusive offers and updates from Oxford Academic. The use of the mite pockets and skin folds by the larvae of E. Each analysis was done with all specimens of each species and repeated separately by sex.

Eutrombicula Alfreddugesi | This chigger was captured on my … | Flickr

Polychrotidae from different habitats on Hispaniola. Gold and Clopton, They settle in the fold and begin feeding. Sign In or Create an Account. One possibility is that guarding and protecting a set of mites may play an important role in decreasing the chances of parasite exchanges and transmission of diseases.

Eutrombicula alfreddugesi

Eutrombicula alfreddugesi males and females do not even necessarily interact with each other, much less their larval offspring. Upon sensing a host, the larvae move up the substrate and attach on to them.


A pair of sensillae projects from the scutum. ADW doesn’t cover all species in the world, nor does it include all the latest scientific information about organisms we describe.

Eutrombicula alfreddugesi has no known positive economic importance. Alreddugesi function of these organs is to sense humidity levels. Following the deutonymph is the tritonymph, which is another inactive stage. When the samples of T. Assuming our samples are representative of the populations from which they were collected, the equal prevalence between sexes for all the species except for T. The chigger mites of Kansas.

IVeutrombicua distribution of parasites over the body was aggregated for all species of Tropidurus. This article is also available for rental through DeepDyve.

For instance, in T. The larval form of Eutrombicula alfreddugesi parasitize mammals, including humans.

Alternatively, other factors may explain the increase in intensity of infestation in specific regions of the body folds and pockets. In insects, “incomplete metamorphosis” is when young animals are similar to adults and change gradually into the adult form, and “complete metamorphosis” is when there is a profound change between larval and adult forms.

Distribution and seasonal and diurnal activity patterns of Eutrombicula alfreddugesi Acari: Their main goal was to test the existence of possible differences in the pattern of parasitism related to seasonal environmental variations, although their hypothesis has not been confirmed. Their results suggest that ectoparasites do not represent a negative factor to denser populations, which would dilute the intensity of infestation across the aggregation.


Clopton and Gold, ; Cunha-Barros, et al. Claparede’s organs give chigger mites critical information about their surroundings, allowing the chigger mites to seek out environments in which they won’t dry out.

This mating season likely has more to do with temperature and humidity requirements, instead of the actual months of the year. Patterns of infestation by chigger mites in four diurnal lizard species from a restinga habitat Jurubatiba of Southeastern Brazil.

Even when data from the same species from different areas are compared, as in the case of T. In the Americas, Eutrombicula alfreddugesi Oudemans, is one of the most widespread species. The larvae of Eutrombicula alfreddugesi are most common in sheltered grasslands.

Eutrombicula alfreddugesi | arachnid |

Accessed December 31, at https: The distribution of larval Eutrombicula alfreddugesi infesting Anolis lizards from different habitats in Hispanola. Although the relationship between body size and intensity of infestation should be expected older and larger lizards presenting afreddugesi higher load than younger and smaller onesassuming all size classes use the same microhabitats, this assumption was not strongly supported by our data.

The deutonymph and adult forms of E. New York, Addison Wesley Longman, 2 nd ed.

Entomological Society of America members Sign in via society site. Bite-count evaluation of the repellency of N,N-diethylmethylbenzamide to larval Eutrombicula alfreddugesi Acari: Therefore, the probability of finding larvae at that site is increased.

A glossary of chigger terminology.