70 



PHYCOMYCETEAE 



Fig. 22. Hyphochytriales. (A-C) Family Anisolpidiaceae. Anisolpidium edocarpii 

 Karliiig. (A) Zoosporangium with unopened exit tube. (B) Zoosporangium discharg- 

 ing the anteriorly uniflagellate zoospores. (C) Portion of filament of Ectocarpus 

 containing one empty zoosporangium and one resting spore. (D) Family Rhizi- 

 diomycetaceae. Rhizidiomyces apophysatus Zopf. (E) Family Hyj^hochytriaceae. 

 Hyphochytriuni catenoides Karling. (A-C, courtesy, Karling: Am. J. Botany, 30(8) :637- 

 648. D-E, courtesy, Sparrow : Aquatic Phycomycetes, Exclusive of the Saprolegniaceae 

 and Pythium, Ann Arbor, Univ. Michigan Press.) 



single anterior flagellum into three families, emplo3ang the ordinal name 

 Anisochytridiales. They may be distinguished as follows: 



Anisolpidiaceae: holocarpic, intramatrical, monocentric, the thallus becoming 

 a sporangium or a resting spore. 

 Three genera: Anisolpidium., Reesia, and Cystochytrium. 

 Rhizidiomycetaceae : eucarpic, monocentric, sporangia and resting spores 

 extramatrical, rhizoidal system intramatrical. 

 Two genera : Rhizidiomyces and Latrostium. 



