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    Redescription of the larva of Amblyomma cajennense (Fabricius) (Acari: Ixodidae) using optical and scanning electron microscopy

    Famadas K.M., Serra-Freire N.M. and Lanfredi R.M.

    1997 - Volume: 38 Issue: 2 pages: 101-109

    Date published: 1997-05-31

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    Keywords: larva, chaetotaxy, Haller's organ, campaniform sensillum, Ixodidae

    The larval stage of Amblyomma cajennense is redescribed, using optical and scanning electron microscopy. Larvae were obtained in the laboratory from an engorged A. cajennense female which had been collected on a horse in the municipality of Itaguai, State of Rio de Janeiro, Brazil. The chaetotaxy of the idiosoma, palps and Haller's organ, the campaniform sensillum on the fifth festoon, as well as other structures, are described for the first time. The nomenclature employed in the chaetotaxy of the palps and Haller's organ is discussed.

    Photos: Varroa destructor (Varroidae) on a honey bee. Low temperature -Scanning electron microscopy photograph. Material collected and fixed for LT-SEM: J. Pettis, USDA-ARS-Bee Lab. and R. Ochoa, USDA-ARS-SEL; LT-SEM photo: E. Erbe and C. Pooley, USDA-ARS-CEMU © USDA; Petrobia harti (Tetranychidae) © INRA - Alain Migeon; Dermanyssus gallinae (Dermanysssidae) © Ecole Nationale Vétérinaire de Lyon – Lise Roy; Adult Ixodes sp. (Ixodidae) engorging on an Atlantic puffin Fratercula arctica © Andy Darrington; Panonychus ulmi (Tetranychidae): hatching of a winter egg © Université de Lausanne – Centre de microscopie électronique – Cazelles

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