Karyotypes and morphology of the male reproductive system of seven species of Psylloidea (Trioza abdominalis, T. cirsii, T. dispar, T. flavipennis, T. munda, T. senecionis, and Bactericera femoralis) were described for the first time.
The karyotype in two species of Cacopsylla (Homoptera, Psyllidae) from populations was investigated.The males were found to be dimorphic with respect to their sex chromosome constitution and the automosome number.Type A (XO) was described for C sorbi.Type B (XY) was described for C mali and Type C (X1X2Y)for two species in the present work.In Type B and Type C reduction of the autosome number was found.The bahaviour of sex chromosome during meiosis was studied.The scheme was proposed indicationg how the XO type, through X-autosome fusion, gave rise to the neo X1X2Y type.
Karyotypes of four species of Pachypsyllinae were reinvestigated (Pachypsylla celtidismamma, P. celtidisvesiculum, P. venusta, Pachypsylla sp. 2, and Tetragonocephala flava) in order to interpret contradiction in the literature data. The morphology of testicular follicles for three species was described for the first time.
The study presents all data recently available on the number of follicles and arragement of their spermatocyte cysts in 132 species of psyllids representing the world fauna.Anatomical differences in the male reproductive system of psyllids and their validation for phylogenetic relations are discussed in detail.
Karyotypes (number and size of chromosomes, sex -determining system) and testis structure (number of testicular follicles) of 37 species belonging to 24 genera of the little studied fulgoroid families Cixiidae, Meenoplidae, Derbidae, Achilidae, Nogodinidae, Tropiduchidae and Flatidae are presented. For Meenoplidae, Nogodinidae and Tropiduchidae data on the testis structure have been obtained for the first time. The data available for Fulgoroidea as a whole are reviewed.
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