IRMNG Taxon list
Penium acanthosporum Lagerheim, 1883 accepted as Cylindrocystis acanthospora (Lagerheim) Lütkemüller, 1913
Penium adelochondrum Elfving, 1881
Penium australe Raciborski, 1892
Penium borgeanum Skuja, 1928 accepted as Actinotaenium borgeanum (Skuja) Kouwets & Coesel, 1984
Penium brebissonii Ralfs, 1848 accepted as Cylindrocystis brebissonii (Ralfs) de Bary, 1858
Penium chrysoderma Borge, 1907 accepted as Penium rufescens Cleve, 1864
Penium clevei P. Lundell, 1871
Penium closterioides Ralfs, 1848 accepted as Closterium closteroides (Ralfs) A. Louis & Peeters, 1967
Penium crassiusculum De Bary, 1858
Penium crassum (West) Irénée-Marie, 1952 accepted as Haplotaenium minutum (Ralfs) T. Bando, 1988
Penium cruciferum (De Bary) Wittrock, 1882
Penium cucurbitinum Bisset, 1884 accepted as Actinotaenium cucurbitinum (Bisset) Teiling, 1954
Penium curtum (Brébisson ex Ralfs) Kützing, 1849 accepted as
Penium cuticulare W. West & G.S. West, 1896
Penium cylindrum (Ehrenberg) Bréb. ex Ralfs, 1848
Penium cylindrus Brébisson ex Ralfs, 1848
Penium didymocarpum P. Lundell, 1871
Penium digitus Brébisson ex Ralfs, 1848 accepted as Netrium digitus (Brébisson ex Ralfs) Itzigsohn & Rothe, 1856
Penium diplosporum Jakobs
Penium exiguum West, 1892
Penium fusiforme F. Gay, 1886 accepted as Closterium navicula (Brébisson) Lütkemüller, 1905
Penium gelidum Wittrock ex De Toni, 1889 accepted as Actinotaenium gelidum (Wittrock ex De Toni) Ruzicka, 1978
Penium gelidum Wittrock, 1883 accepted as Actinotaenium gelidum (Wittrock ex De Toni) Ruzicka, 1978
Penium globosum
Penium gracillimum Playfair accepted as Penium spirostriolatum J. Barker, 1869
Penium granulatum (Bennet) W. West & G.S. West, 1904 accepted as Tetmemorus granulatus Brébisson ex Ralfs, 1848
Penium hunanense C.C. Jao, 1940 accepted as Actinotaenium hunanense (C.C. Jao) Y. Wei, 2006
Penium inconspicuum W. West & G.S. West, 1894
Penium incrassatum Maskell, 1889
Penium interruptum Brébisson ex Ralfs, 1848 accepted as Netrium interruptum (Brébisson ex Ralfs) Lütkemüller, 1902
Penium jenneri Ralfs, 1848
Penium laeve (Ralfs) F. Gay accepted as Tetmemorus laevis Kützing ex Ralfs, 1848
Penium lagenarioides Roy, 1884 accepted as Actinotaenium lagenarioides (Roy) Teiling, 1954
Penium lamellosum Brébisson ex Kutzing, 1849 accepted as Netrium digitus (Brébisson ex Ralfs) Itzigsohn & Rothe, 1856
Penium lanceolatum W.B. Turner
Penium libellula (Focke ex Nordstedt) Nordstedt, 1888
Penium margaritaceum Brébisson, 1848
Penium minutissimum Nordstedt, 1873
Penium minutum (Ralfs) Cleve, 1864 accepted as Haplotaenium minutum (Ralfs) T. Bando, 1988
Penium mooreanum W. Archer, 1864
Penium naegelii Brébisson ex W. Archer, 1861 accepted as Netrium naegelii (Brébisson ex W. Archer) West, 1904
Penium navicula Brébisson, 1856 accepted as Closterium navicula (Brébisson) Lütkemüller, 1905
Penium oblongum De Bary, 1858 accepted as Netrium oblongum (De Bary) Lütkemüller, 1902
Penium pachydermum Playfair accepted as Penium cucurbitinum Bisset, 1884 accepted as Actinotaenium cucurbitinum (Bisset) Teiling, 1954
Penium palangula
Penium phymatospermum Nordstedt, 1876
Penium phymatosporum Nordstedt, 1876 accepted as Actinotaenium phymatosporum (Nordstedt) Kouwets & Coesel, 1984
Penium polymorphum (Perty) Perty, 1852
Penium rufescens Cleve, 1864
Penium rufo-pellitum J. Roy, 1877 accepted as Actinotaenium rufescens (Cleve) Teiling, 1954
Penium semistriolatum Bark.
Penium silvae-nigrae Rabanus, 1923 accepted as Actinotaenium silvae-nigrae (Rabanus) Kouwets & Coesel, 1984
Penium sinensis C.C. Jao, 1940 accepted as Actinotaenium sinense (C.C. Jao) Y. Wei, 2006
Penium spinospermum W. Joshua, 1883 accepted as Actinotaenium spinospermum (Joshua) Kouwets & Coesel, 1984
Penium spinulosum (Wolle) Gerrath
Penium spiriostriolatum
Penium spirostriolatiforme W. West & G.S. West
Penium spirostriolatum J. Barker, 1869
Penium suboctangulare W. West, 1892
Penium subtile W. West & G.S. West, 1897
Penium terrestre C.C. Jao, 1949
Penium trabecula
Penium truncatum Brébisson ex Ralfs, 1848