Abstract
A new alga, Spatoglossum qaiserabbasii Abbas et Shameel, sp. nov. (Dictyotales, Phaeophycota) was collected from the coast of Karachi, Pakistan during March 2009 and investigated for its taxonomy, anatomy and reproductive structures. It is characterised by very rough surface of the thallus, small proliferations all over the surface and highly undulate margins. Anatomically there are variable shapes of the peripheral cells, i.e., cubical or rectangular, triangular or polygonal. The sporangial sori are scattered on both surfaces embeded in peripheral layers, and two types of cortical cells in the basal portion of thallus which have a peculiar arrangement
