Genus: Greater part of axopodia and cell body covered by a thick gelatinous mantle (Kudo, 1966).

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S. fockei cell μm Japan, 1997	S. fockei cell μm Japan, 1997	S. fockei or Raphidiophrys ? cytoplasm exchange Kuroiso Tochigi, 1998	S. fockei or Raphidiophrys ? cytoplasm connected Naruto Chiba, 2003
Sphaerastrum sp. cell μm Japan, 1998	Sphaerastrum sp. cell μm Japan, 1998	Sphaerastrum sp. cell μm Japan, 1997	Sphaerastrum sp. cell μm Japan, 1998
Sphaerastrum sp. ? cell μm Kaga Ishikawa, 2000	Sphaerastrum sp. ? cell μm Kashiwa Chiba, 2002	Sphaerastrum sp. 21 μm φ Numa-no-hara m. Madarao highland Niigata, 2005	Sphaerastrum sp. 20 μm φ Nagaike park Hachioji Tokyo, 2005
Sphaerastrum sp. 20 μm φ Watarase-yusuichi Fujioka Tochigi, 2005	Sphaerastrum sp. 30 μm φ Akebono marsh Tsuchiyu-onsen Fukushima, 2005	Sphaerastrum sp. 30 μm φ Junichogata Himi Toyama, 2006
S. fockei or Raphidiophrys ? cell 25 μm Akebono marsh Tsuchiyu-onsen Fukushima, 2005	S. fockei or Raphidiophrys ? cell 23-30 μm Shimo-no-koike Shiga highland Nagano, 2004	S. fockei or Raphidiophrys ? cell 29-31 μm Onnenai Kushiro marsh Hokkaido, 2005	S. fockei or Raphidiophrys ? cell 25 μm Kodanuki marsh Fujinomiya Shizuoka, 2006
S. fockei or Raphidiophrys ? cell μm Fujimitashiro Katashina Gunma, 2007	S. fockei or Raphidiophrys ? cell μm near Omine Mt. Minakami Gunma, 2007	S. fockei or Raphidiophrys ? cell μm Igashira p. Mooka Tochigi, 2008	S. fockei or Raphidiophrys ? cell μm Miyatoko m.5 Minami-Aizu Fukushima, 2008
Sphaerastrum sp. or Raphidiophrys ? 21 μm φ Ichinose-enchi Norikura highland Nagano, 2005	Sphaerastrum sp. or Raphidiophrys ? 28 μm φ Suiren-numa Hakkoda mountain Aomori, 2005

Similar Genus -->> Raphidiophrys

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