Phylum: Charophyta   Family: Desmidiaceae

Staurastrum manfeldtii var. splendidum  (Messikommer) Coesel

Differs from the type in more pronounced supraisthmial granules, bolder denticulations on the processes and two prominent emarginate verrucae within each margin (seen better in apical view). No data available on distribution

References: 
Coesel, P.F.M. & Meesters, K.J. (2013) European Flora of the Desmid Genera Staurastrum and Staurodesmus
John, D.M. & Williamson, D.B. (2009) A Practical Guide to the Desmids of the West of Ireland