840 AQUATIC PHYCOMYCETES 



LEPTOLEGNIELLA Huneycutt 



J. Elisha Mitchell Sci. Soc, 68: 109. 1952 



(Fig. 65 S-U, p. 836) 



"Mycelium developing mostly intramatrically, hyphae very irregular, 

 much branched, occasionally septate. Rhizoids slender and branching. 

 Zoosporangia branched, not differentiated from the vegetative myce- 

 lium. Zoospores emerging incompletely formed, as in Leptolegnia, di- 

 planetic. Resting bodies formed within the hyphae by rounding up of 

 portions of the protoplasm, asexually formed. 



"With chloro-iodide of zinc the old hyphal walls give a reddish- 

 purple reaction" (Huneycutt, he. cit.). 



Type species: Leptolegniella keratinophilum Huneycutt. 



TAXON NOT IN COKER (1923) OR COKER AND MATTHEWS (1937) 



Leptolegniella piligena Ookubo and Kobayasi 

 Nagaoa, 5:4, fig. 3. 1955 



PROTOACHLYA Coker 

 Saprolegniaceae, 90. 1923 

 (Fig. 66 A-B, p. 842) 



"Hyphae more delicate than in Achlya. Sporangia subcylindric to 

 clavate or flask-shaped, blunt and usually thickest beyond the middle, 

 proliferating like a cyme, as in Achlya, and also less frequently by 

 growth through the empty sporangia as in Saprolegnia. Spores dipla- 

 netic, on emerging ciliated and all or some showing sluggish or less often 

 active motion, some remaining attached in an irregular clump to the 

 tip of the sporangium. Gemmae spheric to pyriform or elongate. 

 Oogonia borne singly, the great majority on short lateral stalks 

 from the main hyphae and with or without a few pits; eggs usu- 

 ally few, centric. Antheridia androgynous or diclinous, typically 

 pyriform with their tips applied to the oogonia" (Coker and Matthews, 

 1937). 



Type species : Protoachlya paradoxa Coker. 



