@Article{biocell.2007.31.229,
AUTHOR = {KHESLLER PATRÍCIA OLÁZIA NAME, GIULIANO PAGY FELIPE DOS REIS, SÔNIA NAIR BÁO},
TITLE = {An ultrastructural study of spermiogenesis in two species of <i>Sitophilus</i> (Coleoptera: Curculionidae)},
JOURNAL = {BIOCELL},
VOLUME = {31},
YEAR = {2007},
NUMBER = {2},
PAGES = {229--236},
URL = {http://www.techscience.com/biocell/v31n2/33972},
ISSN = {1667-5746},
ABSTRACT = {The spermiogenesis of <i>Sitophilus zeamais</i> and <i>Sitophilus oryzae</i>, the maize and the rice weevil, respectively, was studied by light microscopy and scanning and transmission electron microscopy. <i>Sitophilus</i>
spp. is the most widespread and destructive primary pest of stored cereals in the world. The spermiogenesis
occurs within cysts. There are approximately 256 germ line cells per cyst. Inside each cysts, all the spermatids are in the same stage of maturation. The ultrastructure of the spermatozoa of <i>S. zeamais</i> and <i>S. oryzae</i> is
similar to that described for other beetles. The head is formed by a three-layered acrosome with the
perforatorium, the acrosomal vesicle, the extra-acrosomal layer and the nucleus. The flagellum has the typical axoneme formed by a 9+9+2 microtubules arrangement, two mitochondrial derivatives and two accessory
bodies. The typical pattern for Curculionidae spermatozoa described here may provide useful information for
future phylogenetic analysis of the superfamily Curculionoidea.},
DOI = {10.32604/biocell.2007.31.229}
}