title: On the chromosomes of two species of jassids (Cicadellidae: Homoptera).
abstract: Chromosome number and and male meiosis of Hishimonus phycitis and Chiasmus arori of the sub-family Deltocephalinae (Family: Cicadellidae) is discussed. The diploid chromosome number in H. phycitis was found to be 2n = 11-12 with a sex-mechanism of the XO:XX type, while 2n = 16 with a sex-mechanism of XX:XY has been observed in the case of Chiasmus arori. The gonial chromosomes in H. phycitis are gradually seriated, while the diploid complement of C. arori is characterized by a pair of large chromosomes. The mode of male meiosis follows the typical pattern of the family Cicadellidae and is essentially similar in the two species.
mesh_terms: D000818:Animals; D002875:Chromosomes / Q000648:ultrastructure*; D005260:Female; D007313:Insecta / Q000502:physiology / Q000648:ultrastructure*; D007621:Karyotyping; D008297:Male; D008540:Meiosis; D009867:Oogonia; D013093:Spermatogonia; D014960:X Chromosome / Q000648:ultrastructure; D014998:Y Chromosome / Q000648:ultrastructure