| meiosis, spermatogenesis and nucleolar behavior in the seminiferous tubules of alydidae, coreidae and rhopalidae (heteroptera) species. | we studied the karyotype, spermatogenesis and nucleolar activity at spermatogenesis in five species of heteropera: hyalymenus sp and neomegalotomus pallescens, alydidae; catorhintha guttula and hypselonotus fulvus, coreidae; and niesthrea sidae, rhopalidae. they showed a red (alydidae) or orange (coreidae and rhopalidae) membrane covering the testes, which consisted of seven testicular lobes, except in n. pallescens, which had only five. all the species had m-chromosomes, an x0 sex chromosome sy ... | 2009 | 19937583 |