PAPENFUSS: CLASSIFICATION OF THE ALGAE 127 



Family Phacotaceae (Biitschli) Oltmanns (1904, p. 147) 

 Suborder Tetrasporineae West (1916, p. 182) 



Family Palmellaceae (Endlicher) Kiitzing orth. mut. Nageli (1847, p. 

 123) 



Family Coccomyxaceae (Cliodat) G. M. Smith (1933, pp. 350, 366) 

 Family Tetrasporaceae (Nageli) Klebs orth. mut. Wille, in Warming 

 (1884, p. 23) 

 Syn.: Gloeochaetaceae Bohlin (1901, p. 25), nomen nudum; Chaeto- 

 peltidaceae (Borzi) West ortli. mut. Wille (1909b, p. 98) 

 Family Chaetopediaceae Skuja (1948, p. 121) 

 Suborder Chlorodendrineae Fritsch (1935, p. 130) 



Family Chlorodendraceae Oltmanns (1904, p. 136) 

 Family Clilorangiaceae Lemmermann (1915, p. 25) 

 Order ZYGNEMATALES Borge et Pascher (1913, p. 1, as Zygnemales) 



Syn.: Conjugales (De Bary) Rabenhorst orth. mut. G. M. Smith (1920, p. 183); 

 Mesotaeniales Fritsch, in West (1927, p. 225); Desmidiales Krieger (1933, p. 

 173), nomen nudum 



Suborder Zygnematineae Papenfuss, nom. nov. 



Syn.: Euconjugatae (Fritsch) Fritsch (1935, p. 311) 

 Family Mesotaeniaceae Oltmanns (1904, pp. 52, 53) 



(According to the current Code, the nomenclature of this family starts 

 with Ralfs, 1848.) 

 Family Zygnemataceae (Meneghini) Kiitzing orth. mut. Engler (1898, 



p. 11) 



Syn.: Spirogyraceae Palla (1894, pp. 234, 235, as Spirogyraceen) 

 Family Mougeotiaceae Palla (1894, pp. 234, 235, as Mougeotiaceen) 

 Syn.: Mesocarpaceae (De Bary) Wittrock orth. mut. Wille, in Warm- 

 ing (1884, p. 29) ; Temnogametaceae West et West (1897, p. 37) 

 Family Gonatozygaceae (West et West) Fritsch, in West (1927, pp. 

 239, 240) 



Syn.: Archidesmidiaceae Blackman et Tansley (1902, p. 189) 

 Suborder Desmidineae (Fritsch) Fritsch orth. mut. Papenfuss 



(According to the current Code, the nomenclature of this suborder starts 

 with Ralfs, 1848.) 



Family Desmidiaceae Kiitzing (1833b, p. 591) ex Ralfs orth. mut. Stizen- 

 berger (1860, p. 27) 



Syn.: Eudesmidiaceae Blackman et Tansley (1902, p. 189, p.p.) 

 Order ULOTRICHALES Borzi (1895, p. 348, as Ulothrichiales) 



Syn.: Chaetophorales Wille (1901, p. 13); Protococcales (Meneghini) Kirchner 

 orth. mut. Engler (1892, p. 9, p.p.); Pleurococcales Chodat (1909, p. 149); 

 Chroolepoidales Chodat (1909, p. 155) ; Microsporales Bohlin (1901, pp. 19, 25); 

 Cylindrocapsales Prescott (1951, pp. 66, 109); Ulvales Blackman et Tansley 

 (1902, p. 136) 



Family Ulotrichaceae Kiitzing orth. mut. Rabenhorst (1868, pp. 298, 360) 



Syn.: Stichococcaceae Bohlin (1901, p. 19) 

 Family Microsporaceae Bohlin (1901, pp. 19, 25) 

 Family Cylindrocapsaceae Wille, in Warming (1884, p. 30) 

 Family Chaetophoraceae Harvey orth. mut. Stizenberger (1860, p. 34) 

 Syn.: Aphanochaetaceae Oltmanns (1904, pp. 197, 240); Herposteira- 

 ceae (Hasen) West (1904, p. 70); Protodermaceae Kiitzing (1849, p. 

 471) 

 Family Pleurococcaceae Klebs (1883, p. 342) 

 Family Chlorosphaeraceae Klebs (1883, p. 343) 



Family Coleochaetaceae (Nageli) Pringsheim (1860, p. 32, as Coleochae- 

 teen) 



Family Chaetosphaeridiaceae Blackman et Tansley (1902, p. 143) 

 Family Chaetosiphonaceae (Huber) Blackman et Tansley (1902, p. 142) 

 (To judge from the classical account of Huber, 1892, it is not improb- 



