Vol. 1, Issue 10, Part J (2015)

Abstract
The present study was conducted to detected the variation in the shells of the Freshwater Gastropodsrnspecies of Diyala River Basin in Iraq. For this purpose the study area was divided to two sectors,rnNorthern and Southern sectors. The morphological variation in the shells among common species tornNorthern and Southern sectors using a Geometric Morphometric technique were examined.rnThe most abundant species Theodoxus jordani, Melanopsis praemorsa, Lymnaea natalensis, andrnPlanorbis gibbonsi were collected and their shells variation in the size and shape were measured. Thernresults showed significant difference in centroid size for M. praemorsa and L. natalensis while didn’trnrecord in T. jordani and Poggibonsi. Also the study didn’t record significance variance of symmetricalrnfor size and shape of the shell in all species.