Abstract
Male germ cell complement of Pantala flavescens belonging to the family Libellulidae has been investigated. Specimens were collected from the surrounding area of the Harike wetlands in the Punjab state of India. The species possesses 2n ♂=23m as the diploid chromosome number, which is less than the type number, 2n ♂=25m, of the family. In the chromosome complement, one autosomal bivalent is extraordinarily large due to the fusion of 2 autosomes and is responsible for the reduction in chromosome number. Precocious segregation of the m bivalent has also been noticed in some meiotic cells. This type of variations in the chromosome number and behaviour of m chromosomes indicate that the species is under the process of karyotypic evolution.
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