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°25′S latitude and 48°25′W longitude. The eggs are elliptical and ∼575 µm long with a width of ∼144 µm. 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 ∼20 µm and the micropylar orifice is 2.1 µm in diameter. These data may enable construction of taxonomic keys for identifying eggs of Haemagogus species.
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1 March 2008
Scanning Electron Microscopy of the Egg of Haemagogus Tropicalis
Jeronimo Alencar,
Nicolas Degallier,
Anthony ÉRico Guimarães,
Janira Martins Costa,
William De Almeida Marques,
Vanderlei C. Silva,
Jacenir Reis Dos Santos-Mallet
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Journal of the American Mosquito Control Association
Vol. 24 • No. 1
March 2008
Vol. 24 • No. 1
March 2008
eggs, morphology
Haemagogus tropicalis
mosquitoes
scanning electron microscopy
ultrastructure