10.22376/ijpbs.2019.10.1.p1-12 Volume 3 Issue 4 2012(October - December) Mitochondrial Cytochrome oxidase I and II (CO I+II) region was characterized among five sympatric species of the genus lessThan i greaterThan Sarcophaga lessThan /i greaterThan with a view to unravel genetic relationship. Average nucleotide pair wise distance was 0.283, which indicates that these species are genetically very close. The phylogenetic tree obtained by distance and character based method groups lessThan i greaterThan S. dux, lessThan /i greaterThan lessThan i greaterThan S. albiceps lessThan /i greaterThan and lessThan i greaterThan S. knabi lessThan /i greaterThan together in one cluster while lessThan i greaterThan S. ruficornis lessThan /i greaterThan and lessThan i greaterThan S. argyrostoma lessThan /i greaterThan were grouped together in another cluster. BAJPAI N. AND TEWARI R. R. Cytochrome oxidase subunits, flesh flies, genetic relationship, Sarcophaga 521-525