Additional records of the River Limpet,Ancylus fluviatilis,from the Middle East

Abstract

The variation of 21 morphological parameters was investigated in populations of Atyaephyra desmaresti desmaresti and A. desmaresti orientalis in order to find differences between the sexes and to assess the degree of infraspecific variation. Differences between the sexes were found in three proportional characters of A. desmaresti desmaresti and in five characters of A. desmaresti orientalis. Also, the difference in one meristic character was found to be significant in both subspecies.