PAPENFUSS: CLASSIFICATION OF THE ALGAE 173 



Order SPOROCHNALES Sauvageau (1926, p. 364) 



Family Sporochnaceae Greville orth. mut. Harvey (1849, p. 10) 

 Order DESMARESTIALES Setchell et Gardner (1925, p. 554) 

 Syn.: Arthrocladiales Sauvageau (1931, p. 117) 



Family Arthrocladiaceae Chauvin orth. mut. Hauck (1883, p. 317) 

 Family Desmarestiaceae (Thuret) Kjellman (1880, p. 10) 

 Order DICTYOSIPHONALES Setchell et Gardner (1925, p. 586) 

 Syn.: Punctariales Kylin (1933, p. 93) ; Scytosiphonales Feldmann (1949, p. 112) 

 Family Striariaceae Kjellman (1890, p. 53) 



Syn.: Stictyosiphonaceae (Kjellman) Kuckuck (1929, p. 80) 

 Family Giraudyaceae (Kjellman) Hygen (1934, p. 210) 

 Family Myriotrichiaceae Kjellman (1890, p. 46) 

 Family Punctariaceae (Thuret) Kjellman (1880, p. 9) 



Syn.: Encoeliaceae (Bory) Kiitzing orth. mut. Kjellman (1890, p. 55); 

 Asperococcaceae (Zanardini) De Toni et Levi orth. mut. Foslie (1890, 

 p. 88); Litosiphonaceae Kuckuck (1929, p. 80), nomen nudum; Soran- 

 theraceae Kuckuck (1929, p. 80), nomen nudum 

 Family Scytosiphonaceae (Thuret) Hauck (1883, p. 317) 



Syn.: Phaeosaccionaceae Feldmann (1949, p. 112) 

 Family Chnoosporaceae Setchell et Gardner (1925, p. 552) 

 Family Dictyosiphonaceae Kiitzing orth. mut. Kjellman (1890, p. 49) 

 Syn.: Coilodesmaceae (Kjellman) Setchell et Gardner (1925, p. 577) 

 Order LAMINARIALES Kylin (1917, p. 308) 



Family Chordaceae Dumortier (1822, pp. 72, 102) 



Family Laminariaceae (C. Agardh) Dumortier orth. mut. Dumortier 



(1829, p. 77) 



Syn.: Phyllariaceae (Kjellman) Hamel (1938, p. 304) 

 Family Lessoniaceae (Setchell) Setchell et Gardner (1925, p. 621) 

 Family Alariaceae (Kjellman) Setchell et Gardner (1925, p. 633) 

 ^Family Prototaxitaceae Pia (1927, p. 95) 

 Order FUCALES Kylin (1917, p. 309) 



Family Ascoseiraceae Skottsberg (1907, p. 148) 



Family Durvilleaceae (Oltmanns) De Toni (1891b, p. 173) 



Family Notheiaceae Kuckuck (1929, p. 12) ex 0. C. Schmidt (1938, p. 224) 



Syn.: Hormosiraceae (Gruber) Fritsch (1944, p. 257) 

 Family Fucaceae Lamoroux orth. mut. Dumortier (1822, p. 72) 

 Family Himanthaliaceae (Kjellman) De Toni (1891b, p. 173) 

 Family Cystoseiraceae Kiitzing orth. mut. De Toni (1891b, p. 173) 

 Family Sargassaceae (Decaisne) Kiitzing orth. mut. De Toni (1891b. 

 p. 174) 



Phylum Schizopiiyta 



class schizophyceae 



Characterization: As a class the Schizophyceae (Cyanophyceae, Myxophyceae) or 

 bluegreen algae as they are commonly called are sharply distinguished from the other 

 large groups of algae. The low state of cell differentiation, the bluegreen color of the 

 thalli, the production of cyanophycean starch (Kylin, 1943a) and the absence of an 

 organized nucleus are characters that clearly set them apart. There is at present no good 

 evidence indicating that they evolved from flagellated ancestors or that they are the 

 direct ancestors of other algal groups, although a very distant relationship with the red 

 algae is not improbable. 



The simplest Schizophyceae are unicellular. In many instances, however, the indi- 

 vidual cells remain attached to one another to form colonies of various shapes and sizes. 

 The more advanced types are filamentous. The filaments are simple or branched and may 

 be aggregated. The branched forms exhibit false or true branching or both types of 

 branching. The individual cells of the unicellular forms and the filaments of the fila- 



