Phylum: Charophyta Family: Desmidiaceae
Hyalotheca dissiliens var. minor Delponte
Recorded as less common that the nominate variety on the continent, but little data available for Britain to make an assessment
References:
Coesel, P.F.M. & Meesters, K.J. (2007) Mesotaeniaceae and Desmidiaceae of the European Lowlands