Genus: Two flagella of equal length inserted close together into an anterior papilla of variable shape usually directed anteriorly; chloroplast form variable; usually 2 contractile vacuoles; cell division producing 2-8 zoospores; sexual reproduction usually isogamous, anisogamy and oogamy known but rare; > 500 species, mostly fresh water (Illustrated Guide, 1985). A large chloroplast; stigma; a single nucleus; two contractile vacuoles anterior (Kudo, 1966).

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Chlorogoniella: Chloroplast lateral; pyrenoid central lateral; nucleus anterior-posterior
C. geitleri 21 x 11.5 μm n: posterior s: center papilla dichotomous Akigase Park Saitama, 2002	C. asymmetrica 12-14 x μm n: posterior s: xxxx Naruto Chiba, 2003	C. rhinoceros ? 16-20 μm s: equatorial Yamato Kanagawa, 2003	C. fiscina ? 17 x 15 μm s: center n: posterior Tachikawa Tokyo, 2004
C. acuta ? 16 x 8 μm s: center n: posterior Asa-kawa Hachioji Tokyo, 2005	C. oligochloris 8-13.5 μm φ Tsukuba Ibaraki, 2002	C. botryopara ?? 11 x 8 μm Azuma river Tokorozawa Saitama, 2004	C. proteus ? 11 x 6.5 μm s: anterior n: posterior Shiraoka Saitama, 2003
C. proteus ? 10 x 4.5 μm s: anterior n: posterior Kumagaya Saitama, 2004	C. aplanata ? 11 x 5 μm s: center Oh-asoh Kumagaya Saitama, 2004
C. fusus ? 10-11 x 4-5 μm Iruma river Sayama Saitama, 2004	C. fusus ? 6-10 x 4-5 μm Watarase river Ashikaga Tochigi, 2004	C. fusus ? 11 x 4.5 μm Kitamoto nature o.p. Kitamoto Saitama, 2005
C. sagittula ? 10 x 2.5 μm Ara river Kumagaya Saitama, 2004	C. sagittula ? 9.5 x 3 μm near Town Hall Shobu Saitama, 2004	C. baca ? 5-7 x 4 μm s: center Karasu river Takasaki Gunma, 2004	C. kakosmos ? 10-11 x 6-7 μm s: center Shimo-muneoka Shiki Saitama, 2004

Similar genus -> Chloromonas; Chlorococcum;

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