Use este identificador para citar ou linkar para este item: https://locus.ufv.br//handle/123456789/24674
Tipo: Artigo
Título: Female reproductive system of the decapitating fly Pseudacteon wasmanni Schmitz (Diptera: Phoridae)
Autor(es): Zacaro, Adilson A.
Porter, Sanford D
Abstract: Pseudacteon wasmanni is a South American decapitating fly that parasitizes workers of Solenopsis fire ants. We used light microscopy (historesin serial-sectioning stained with Haematoxylin/Eosin) and scanning electron microscopy to show and analyze internal and whole external views of the female reproductive system. All specimens analyzed (n=9) by light microscopy showed post-vitellogenic oocytes inside the ovaries. The lack of typical follicles (oocyte-nurse cell complexes) in all specimens suggests that oogenesis occurs during the pupal stage. The total number of eggs found ranged from 31 to 280 (X=142±73, SD). The egg has a slugform or torpedo shape (about 130 by 20 μm) with a pointed apex at the posterior pole as defined by the fly; the micropyle appears to be in a depression or invagination at the anterior pole. An acute hypodermic-like ovipositor is evaginated from the hard sclerotized external genitalia during egg laying. The existence of a muscular bulb associated with the end of the common oviduct suggests that the egg is injected into the ant's body by a strong contraction of the bulb which probably is stimulated by bending of several ventral sensilla. During contraction, the abdomen extends out along a large fold between the sixth and seventh tergites in such a way that the sclerotized genitalia is rotated ventrally into a slightly anterior orientation in preparation for oviposition.
Palavras-chave: Ovary
Fire ant
Solenopsis
Biocontrol
Ovipositor
Brazil
Editor: Arthropod Structure & Development
Tipo de Acesso: Elsevier B. V.
URI: https://doi.org/10.1016/S1467-8039(02)00049-X
http://www.locus.ufv.br/handle/123456789/24674
Data do documento: Abr-2003
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