Meiosis in two Species ofParabolocratuswith Polymorphic Sex Chromosomes in Males ofP. Albomaculatus(Homoptera)

Chromosomes of Five Species of Spittle Bugs(Homoptera, Cercopidae).

“…There fore, the study of different populations of C. decisa might reveal polymorphic sex chromo somes, if any. In Homoptera, polymorphic sex chromosomes were recorded earlier in two species of Cicadellidae, Rhopalopyx preyssleri (Halkka 1959) and Parabolocratus albomacula tus (Manna and Bhattacharya 1973), and in one species of Delphicidae, Dicranotropis hamates (Halkka 1959). It has also been suggested that, in case of P. albomomaculatus, X-autosome translocation is responsible for the origin of polymorphic sex chromosomes.…”

Comparative cytogenetics of Auchenorrhyncha (Hemiptera, Homoptera): a review

“…Some cases of sex chromosome polymorphism were discovered in the leafhoppers Austragalloides sp. (Whitten 1968), Parabolocratus albomaculatus Distant (Manna and Bhattacharya 1973), Oncopsis tristis Zetterstedt, and Oncopsis flavicollis (Linnaeus) (John and Claridge 1974), as well as in the planthoppers Dicranotropis hamata Boheman (Delphacidae) and Repetekia orbicularis Oshanin (Dictyopharidae) (Halkka 1959, Kuznetsova 1986). In Parabolocratus albomaculatus from India, the males were found to be dimorphic in sex chromosome constitution.…”

“…Type B displayed 2n = 18 with X being the largest, Y relatively small, and the pair of large autosomes present in Type A was absent. The sex chromosomes in Type B were suggested to have originated as neo-X and neo-Y by the X-autosome translocation from Type A (Manna and Bhattacharya 1973). …”

Multivalents inEutettix Apricus(Melich) with Notes on the Chromosomes of Five near Relatives (Jassidae, Homoptera)

“…What about chromosomes with nonlocalised centromeres which the homopteran insects possess? Till date only two features exist in this respect (WHITTEN and TAYLOR 1969;MANNA and BHATTACHARYA 1973 ), while there are others (BHATTACHARYA 1972(BHATTACHARYA , 1973a(BHATTACHARYA , 1973b(BHATTACHARYA , 1973cBHATTACHARYA and MANNA 1967, 1970, 1973a, 1973b where such a mechanism has been assumed on the basis of metrical analysis. This communication records multivalent structures in Eutettix apricus, together with some findings in four species of Phrynomorphus ( = Athysanus ), Division-Athysanusaria;…”