To cite this article: Ashraf, S., Tahir, H.M., Qazi, M.A. and Ali, S., 2019.  Variations in nucleotide frequency distribution in spider families. Punjab Univ. J. Zool., 34(1): 101-104. http://dx.doi.org/10.17582/journal.pujz/2019.34.1.101.104