• Acinaria coccifera Rafinesque, 1819 accepted as Nitella flexilis (Linnaeus) C.Agardh, 1824
• Acinaria flexuosa Rafinesque, 1819 accepted as Nitella acuminata A.Braun ex Wallman, 1853
• Acinaria latifolia Rafinesque, 1819 accepted as Nitella clavata Kützing, 1849
• Acinaria salicifolia Rafinesque, 1819 accepted as Nitella praelonga A.Braun, 1882
• Aclistochara arguta (R.E.Peck) M.D.Georgescu & W.K.Braun, 2006 †
• Aclistochara bransonii R.E.Peck, 1937 †
• Aclistochara brevis Shui Wang ex X.G.Zhou, 1983 †
• Aclistochara brotzenii Horn af Rantzien †
• Aclistochara caii Shui Wang, 1965 † accepted as Aclistochara bransonii R.E.Peck, 1937 †
• Aclistochara clivulata Peck & Reker †
• Aclistochara complanata Peck †
• Aclistochara compressa (Knowlton) Peck & Reker † (uncertain)
• Aclistochara coronata Peck & Reker †
• Aclistochara crassa (Dollfus & Fritel) Grambast & Grambast † (uncertain)
• Aclistochara cylindrica R.E.Peck, 1941 †
• Aclistochara datongheensis Zhenxin Wei, 1983 †
• Aclistochara elliptica (Fritzsche) Doweld, 2015
• Aclistochara elongata R.E.Peck, 1937 † accepted as Aclistochara bransonii R.E.Peck, 1937 †
• Aclistochara faceta Zhenxin Wei, 1983 †
• Aclistochara firma Zhenxin Wei, 1983 †
• Aclistochara fortis Zhenxin Wei, 1983 †
• Aclistochara fusca Mädler, 1952 † accepted as Porochara fusca (Mädler) Mädler, 1955 †
• Aclistochara fusca var. minor Mädler, 1952 † accepted as Porochara fusca (Mädler) Mädler, 1955 †
• Aclistochara gothanii Rásky † (uncertain)
• Aclistochara grovesii Rásky †
• Aclistochara gulistanica (Kyansep-Romashkina) Feist-Castel & N.Grambast, 1991 †
• Aclistochara helicteres (Brongniart) Grambast & Grambast †
• Aclistochara hildesiensis Mädler, 1952 †
• Aclistochara hongguensis Zhenxin Wei, 1983 †
• Aclistochara huangshuiensis G.D.Yang, 1983 † accepted as Aclistochara bransonii R.E.Peck, 1937 †
• Aclistochara huihuibaoensis Shui Wang, 1965 † accepted as Aclistochara bransonii R.E.Peck, 1937 †
• Aclistochara hungarica Rásky † accepted as Aclistochara bransonii R.E.Peck, 1937 †
• Aclistochara indica S.B.Bhatia & Mannikeri, 1977 †
• Aclistochara indica subsp. mittrei S.B.Bhatia & Mannikeri, 1977 †
• Aclistochara jaisalmerensis (S.B.Bhatia & Mannikeri) Molinari & Guiry, 2021 †
• Aclistochara jimusaerensis J.Liu & X.Wu, 1985 †
• Aclistochara jonesii R.E.Peck, 1937 †
• Aclistochara kimmeridgensis Mädler, 1952 † accepted as Porochara kimmeridgensis (Mädler) Mädler, 1955 †
• Aclistochara kraeuselii Rásky †
• Aclistochara laiae Shui Wang, 1965 † accepted as Aclistochara bransonii R.E.Peck, 1937 †
• Aclistochara lata R.E.Peck, 1937 † accepted as Aclistochara bransonii R.E.Peck, 1937 †
• Aclistochara latisulcata R.E.Peck, 1957 †
• Aclistochara latitruncata R.E.Peck, 1937 † accepted as Latochara latitruncata (R.E.Peck) K.Mädler
• Aclistochara lianmuxinensis J.Liu & X.Wu, 1985 †
• Aclistochara longiconica Y.C.Hao, 1983 †
• Aclistochara longiformis Shui Wang ex G.D.Yang, 1983 †
• Aclistochara lufengensis (Zhi Wang, R.J.Huang & Shui Wang) Zhenxin Wei, G.D.Yang & X.G.Zhou, 1983 † accepted as Porochara westerbeckensis (Mädler) Mädler, 1955
• Aclistochara maedleri Rásky †
• Aclistochara maxima P.Donze, 1955 † accepted as Musacchiella maxima (P.Donze) Feist-Castel & N.Grambast, 1985 †
• Aclistochara medicaginula (Lamarck) Grambast & N.Grambast † accepted as Gyrogonites medicaginulus Lamarck, 1801 †
• Aclistochara minima Mädler, 1952 † accepted as Porochara minima (Mädler) Shaikin, 1976 †
• Aclistochara minima f. brevis Mädler, 1952 † accepted as Porochara minima (Mädler) Shaikin, 1976 †
• Aclistochara mitella Peck & Reker †
• Aclistochara moreyi (Peck) Peck † (uncertain)
• Aclistochara mundula R.E.Peck, 1941 † accepted as Porochara mundula (R.E.Peck) Shaikin, 1976 †
• Aclistochara nana (Lu) Horn af Rantzien † (uncertain)
• Aclistochara noszkyi Rásky †
• Aclistochara nuguishanensis (Z.Wang et al.) Y.C.Hao et al., 1983 †
• Aclistochara nuguishanensis Molinari & Guiry, 2021 †
• Aclistochara obovata R.E.Peck, 1937 †
• Aclistochara oligospirata R.E.Peck, 1937 † accepted as Aclistochara bransonii R.E.Peck, 1937 †
• Aclistochara peckii Rásky †
• Aclistochara platyglobata Y.C.Hao, 1983 †
• Aclistochara poculiformis G.D.Yang, 1983 †
• Aclistochara polyspirata Mädler, 1952 † accepted as Aclistochara bransonii R.E.Peck, 1937 †
• Aclistochara polyspirata f. elegans Mädler, 1952 †
• Aclistochara polyspirata f. globosa Mädler, 1952 †
• Aclistochara praemaedleri S.B.Bhatia & Mannikeri, 1977 †
• Aclistochara raskyae Mädler, 1952 † accepted as Porochara raskyae (Mädler) Mädler, 1955 †
• Aclistochara rotunda R.E.Peck, 1957 † accepted as Porochara kimmeridgensis (Mädler) Mädler, 1955 †
• Aclistochara shanchengensis Zhenxin Wei, 1983 †
• Aclistochara shiwanensis X.G.Zhou, 1983 †
• Aclistochara sinkiangensis (Lu) Horn af Rantzien † (uncertain)
• Aclistochara staubii Rásky †
• Aclistochara stellerides Zhenxin Wei, 1983 †
• Aclistochara subquadrularia Zhenxin Wei, 1983 †
• Aclistochara supraplana Peck & Reker, 1947 † accepted as Nitellopsis supraplana (Peck & Reker) L.Grambast & Soulié-Märsche, 1973 †
• Aclistochara tasnadii Rásky †
• Aclistochara thoerenensis Mädler, 1952 †
• Aclistochara thoerenensis var. minor Mädler, 1952 †
• Aclistochara torulosa (Dollfus & Fritel) Grambast & Grambast † (uncertain)
• Aclistochara triassica Saidakovsky †
• Aclistochara truncata G.D.Yang, 1983 †
• Aclistochara umbonata Zhenxin Wei, 1983 †
• Aclistochara urniformis Zhenxin Wei, 1983 †
• Aclistochara usitata Zhenxin Wei, 1983 †
• Aclistochara vadaszii Rásky †
• Aclistochara wangii G.D.Yang, 1983 †
• Aclistochara westerbeckensis Mädler, 1952 † accepted as Porochara westerbeckensis (Mädler) Mädler, 1955
• Aclistochara wrightii Grambast & Grambast †
• Aclistochara xiangtangensis Zhenxin Wei, 1983 †
• Aclistochara yongpingensis Molinari & Guiry, 2021 †
• Aclistochara yunnanensis (Zhi Wang, R.J.Huang & Shui Wang) Zhenxin Wei, G.D.Yang & X.G.Zhou, 1983 † accepted as Aclistochara jaisalmerensis (S.B.Bhatia & Mannikeri) Molinari & Guiry, 2021 †
• Aclistochara zongyangensis Zhen Wang, 1981 †
• Actinodontum basituberculoides (Bourrelly & Couté) Alfinito & Coesel, 2013
• Actinodontum elgonense Alfinito & Coesel, 2013
• Actinodontum lomaense (Alfinito & Mazzoni) Alfinito & Coesel, 2013
• Actinotaenium adelochondrum (Elfving) Teiling, 1954
• Actinotaenium adelochondrum var. kriegeri (Messikommer) Teiling, 1954 accepted as Actinotaenium kriegeri (Messikommer) Kouwets, 1997
• Actinotaenium adelochondrum var. parvum E.A.Flint & D.B.Williamson, 1999