Elimaea securigera Stol.-A Karyotypically Dynamic Species (Orthoptera: Tettigoniidae)
1993 Volume 58 Issue 4 Pages 423-425
Details
1993 Volume 58 Issue 4 Pages 423-425
1) Chromosomal survey of a Mysore population (S.W. India) of a tettigonid, Elimaea securigera revealed two karyotypes-Normal and “Variant” karyotypes.
2) All the individuals have in common a diploid number of 27 chromosomes (26AA+X) including a large acrocentric X chromosome.
3) The normal karyotype seen in 30 males consists of all acrocentric chromosomes. The “Variant” karyotype differs from the normal one in showing structural polymorphism in four pairs of chromosomes; one pair with acro/submeta, two pairs with submeta/submeta, and one pair having subacro/subacrocentric chromosomes.
4) The possible mechanism of the evolution of the “Variant” karyotype is discussed.
