Kuznetsova V G, Petropavlovskaia M B
Tsitologiia. 1976;18(6):702-11.
Chromosomes were studied on the spermatogonial metaphase and on different stages of meiotic division in males of Eurydeme geblery Kol. and E. ventrale Kol. The set of male chromosomes of the above species involves six pairs of autosomes and an XY sex pair, which is commonly the case in Pentatomidae. In the spermatogenesis, division types are reductional for autosomes and equational for sex chromosomes in the first metaphase; but the situation is quite opposite in the second metaphase. The sex chromosomes of bugs undergo a "touch and go" pairing on the metaphase plate of the second spermatocyte, prior to segregating to opposite poles in the anaphase that follows. No constrictions occur along all the chromosomes at mitosis. This, combined with their behaviour at mitosis, may suggest that, likely as in other Hemiptera, the chromosomes are holokinetic. Nevertheless it is of interest to note that in meiosis the chromosomes behave as telocentric. This replacement of the holokinetic orientation by the telokinetic one in the meiosis of some organisms with diffuse centromere is supposed to depend on the phenomen called "construction of the kinetic activation".
对格氏宽盾蝽（Eurydeme geblery Kol.）和腹宽盾蝽（E. ventrale Kol.）雄性个体的精原细胞中期以及减数分裂不同阶段的染色体进行了研究。上述物种的雄性染色体组包括六对常染色体和一对XY性染色体，这在蝽科中是常见情况。在精子发生过程中，常染色体在第一次中期进行减数分裂，性染色体进行均等分裂；但在第二次中期情况则相反。蝽的性染色体在第二个精母细胞的中期板上进行“短暂”配对，然后在随后的后期分离到相对的两极。在有丝分裂过程中，所有染色体上均未出现缢痕。这一点，再结合它们在有丝分裂时的行为，可能表明，就像在其他半翅目昆虫中一样，这些染色体是全着丝粒的。然而，值得注意的是，在减数分裂中染色体表现为端着丝粒。在一些具有弥散着丝粒的生物体的减数分裂中，全着丝粒取向被端着丝粒取向所取代，这被认为取决于所谓的“动力激活构建”现象。
