TAXONOMIC STUDIES ON THE GENUS COSMARIUM CORDA (DESMIDOPHYCEAE) FROM NORTH-EASTERN AREAS OF PAKISTAN

摘要

A brown alga Stypopodium zonale (Lamouroux) Papenfuss (Dictyotales) was collected from Manora and Buleji, thecoastal areas near Karachi (Pakistan) during March 2006-April 2009 and investigated for its morphology, anatomy andreproductive structures. This is the first detailed study on the Pakistani specimens of this species from these points of view,where presence or absence of intercellular spaces, cell-wall thickness of different cells and structure of surface cells wereexamined. In this connection the apical, middle and basal parts of the thallus were investigated anatomically.