Family: Filamentous algae attached to a substrate at base, differentiation of axis-branch structure variable; cell body cylindrical, spherical or elongated ellipsoidal, with one or several plate-like chloroplasts; pyrenoids one to several in number or absent; terminal cells tapered or rounded at its end (Illustrations of The Japanese Fresh-water Algae, 1977).
Genus:

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Lateral branches consisting of axial/lateral filaments; outline elongated-spindle-shaped
D. plumosa μm Shishizuka Tsuchiura Ibaraki, 2003	D. plumosa 55 x 40 μm Omoi river Oyama Tochigi, 2004	D. plumosa μm Shirakobato water p. Koshigaya Saitama, 2004	D. plumosa 28-40 x 22 μm Oyoshi Park Koshigaya Saitama, 2006
D. plumosa μm Muneoka Saitama Saitama, 2005	D. plumosa μm Tanohara marsh Shiga highland Nagano, 2004	D. plumosa μm Hasu-ike Shiga highland Nagano, 2005	D. plumosa μm Kumakubo Nasu-shiobara Tochigi, 2005
D. plumosa 40 x 14 μm Ikenokochi m.5 Tsuruga Fukui, 2006	D. plumosa 40 x 14 μm Numa-no-hara m Madarao highland Niigata, 2006	D. plumosa 40 x 14 μm Numa-no-hara m Madarao highland Niigata, 2007	D. plumosa μm Senjo-ga-hara Nikko Tochigi, 2003
D. plumosa 15-33 x 27-28 μm Oyomi marsh Hakuba Nagano, 2006	D. plumosa μm Kejo-numa Furukawa Miyagi, 2003	D. glomerata μm Satsunai river Obihiro Hokkaido, 2005
Lateral branches without axial/lateral differentiation; outline spherical or fan-shaped

Similar Genus -> Draparnaldiopsis; Chaetophora; Cladophora;

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