Family:
Genus: Greater part of axopodia and cell body covered by a thick gelatinous mantle (Kudo, 1966).
Sphaerastrum sp.
10 clips
USA, 1998
Sphaerastrum sp.
3 clips
USA, 1998
Sphaerastrum sp.
16 clips
Torinome-Kasen p.
Nasu-shiobara
Tochigi, 1998