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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Morphological description of the nymphal stage of Amblyomma geayi and new nymphal records of Amblyomma parkeri

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Author(s):
Martins, Thiago F. [1] ; Scofield, Alessandra [2] ; Oliveira, Wanessa B. L. [2] ; Nunes, Pablo H. [3] ; Ramirez, Diego G. [1] ; Barros-Battesti, Darci M. [4] ; Sa, Lilian R. M. [1] ; Ampuero, Fernanda [1] ; Souza, Jr., Julio C. [5] ; Labruna, Marcelo B. [1]
Total Authors: 10
Affiliation:
[1] Univ Sao Paulo, Fac Vet Med, BR-05508270 Sao Paulo - Brazil
[2] Fed Univ Para, Fac Vet Med, Castanhal, PA - Brazil
[3] Sao Paulo State Univ, Inst Biosci, Rio Claro, SP - Brazil
[4] Butantan Inst, Parasitol Lab, Sao Paulo - Brazil
[5] Univ Reg Blumenau, FURB, Blumenau, SC - Brazil
Total Affiliations: 5
Document type: Journal article
Source: TICKS AND TICK-BORNE DISEASES; v. 4, n. 3, p. 181-184, 2013.
Web of Science Citations: 14
Abstract

The external morphology of the nymph of Amblyomma geayi Neumann is described by optical and scanning electron microscopy. Unfed nymphs were obtained from an engorged A. geayi female, which had been collected on a sloth (Bradypus variegatus) from Belem municipality, State of Para, northern Brazil, and was kept under laboratory conditions. With the present description, we propose a modification of a taxonomic key published in 2010 for the Amblyomma nymphs that occur in Brazil, through the inclusion of A. geayi. The nymph of A. geayi is morphologically very similar to the nymph of Amblyomma parkeri Fonseca and Aragao, with only slight morphological differences related to scutal surface and punctuations (more shagreened and less punctuated in A. geayi). These 2 nymphs differ from all other known Amblyomma nymphs from Brazil by the combination of auriculae present as small posterolateral rounded projections, eyes located at the level of the scutal midlength, and a rounded hypostome. These nymphal similarities as well the morphology of the adult stage corroborate previous studies that showed that A. geayi and A. parkeri are genetically closely related. Unpublished host records of the nymphs of both A. geayi and A. parkeri are provided. Established populations of A. geayi and A. parkeri seem to be geographically separated, since all confirmed records of A. geayi are from the northern half of South America (mainly the Amazonian region) and Central America, whereas all known records of A. parked are from the Atlantic rainforest biome in northeastern, southeastern, and southern Brazil. (c) 2013 Elsevier GmbH. All rights reserved. (AU)

FAPESP's process: 11/00271-9 - Occurrence and characterization of the affections of wild brown howler monkeys (Alouatta guariba clamitans Cabrera, 1940) from São Paulo city
Grantee:Fernanda Ampuero
Support Opportunities: Scholarships in Brazil - Scientific Initiation