Cytology of Ten Species of Crickets from Chandigarh (India)

Abstract

The male diploid number of chromosomes in 10 species of crickets of the superfamily Grylloidea vary from 11 to 29 with the XO sex mechanism in the male. The four species among these viz., Laxoblemmus deteerus, L. animao, Turanogryllus jammuensis and Stephoblemmus humbertiellus with 2n varying from 11-21 are recorded cytologically for the first time. The cytological reinvestigations on Gryllus bimaculatus, G. melanocephalus, Gryllodes sigillatus, Pleronemobius fascipes and Trigonidium cicindeloides form Chandigarh and its neighbouring areas have revealed the same findings like those of the earlier workers. In Gryllus confirmatus, however, been observed and discussed in this paper.