Taxonomy provides us with basic understanding about the components of biodiversity which is necessary for effective decision making about conservation and sustainable use. Taxonomy is a vital component of biodiversity management, as the first step towards protecting and benefiting from biodiversity is sampling, identifying and studying biological specimens. DNA barcoding offers taxonomists the opportunity to greatly expand and eventually complete a global inventory of life’s diversity. The utility of DNA barcoding in identifying spider species was revealed in this study. The study established that the mitochondrial gene cytochrome c oxidase I (COI) can serve as the core of a global bioidentification system for animals. The study also demonstrated that COI identification system will provide a reliable, cost-effective and accessible solution to the current problem of species identification. A comparative study of CO1 sequence of nine families of spiders and their phylogenetic analysis was performed and it showed their relationship with evolution of web building behaviour. Thus this study revealed the relationship between molecular and morphological taxonomy.
