Karyological studies of four species of grasshoppers from Gurdaspur district of Punjab, India

Karyotypic Variations in the Chromosome Complement of Pantala flavescens (Fabricius) of the Family Libellulidae (Anisoptera: Odonata)

“…In India, chromosomal data is available on approximately 35 species (Oguma and Asana 1932, Makino 1935, Asana and Makino 1935, Kichijo 1942, Ray Chaudhuri and Dasgupta 1949, Dasgupta 1957, Kiauta 1975, Tyagi 1978a, b, 1982, 1986, Yadav 1979, Thomas and Prasad 1981, 1984, 1986, Sandhu and Walia 1994a, b, 1995, Sharma and Durani 1995, Walia and Sandhu 1998, 2002, Walia 2008a. Most of these species possess 2n=25m as the diploid chromosome number, which is the type number of the family.…”

“…In India, 470 species are taxonomically known, and out of these 85 species, belonging to 39 genera, are of the family Libellulidae. Karyological data is available on approximately 35 libellulid species (Oguma and Asana 1932, Makino 1935, Asana and Makino 1935, Kichijo 1942, Ray Chaudhuri and Dasgupta 1949, Dasgupta 1957, Kiauta 1975, Tyagi 1978a, b, 1982, 1986, Yadav 1979, Thomas and Prasad 1981, 1984, 1986, Sandhu and Walia 1994a, b, 1995, Sharma and Durani 1995, Walia and Sandhu 1998, 2002, Walia, 2008a. The modal chromosome number of the family Libellulidae is n=13 (90% of the species), and a pair of m chromosomes are very frequently present with XO-XX type sex determination.…”

Karyotypic Studies of Six Species of Grasshopper (Orthoptera: Acrididae) from Kolhapur District, Maharashtra, India

“…The number and morphology of the chromosomes are very similar, so it is very difficult to recognize genus and even families of Orthopteran insects based on simple karyotyping (Sandhu and Chadha 2012).…”