Genus Helicotylenchi^s Stei.ncr, 19U5 

 (Key to species modified from Golden^ 1956) 



1. Tail conical, ending in a flagellum-like structure 

 africanus (liicoletzky, 1915) Andrassy, 1958 



syn: Tylenchus africanus Micoletzky, 1915 



Tylenchorhynchus africanus (Micoletzky, 1915) Stekh. Sc Teunissen, 

 I93B 



Rotylenchus africanus (Micoletzky, 1915) Filipj. & Stekh., I9UI 

 Tail not conical and without flagellum-like structure 2 



2. Opening of dorsal esophageal gland usually less than I/3 of stylet 

 length from base of stylet; tail with distinct ventral terminal 

 process melancholicus (Lordello, 1955) Andrassy, 1958 



syn: Rotylenchus melancholicus Lordello, 1955 

 Opening of dorsal esophageal gland 1/3 or more of stylet length from 

 base of stylet 3 



3. Tail generally rounded; stylet approximately 22u 

 multicinctus (Cobb, 1893) Golden, 1956 



syn: Tylenchus multicinctus Cobb, 1893 



Rotylenchus multicinctus (Cobb, 1393) Filipjev, 1936 



Anguillullna multicincta (Cobb, 1893) Goodey, I9U0 



Tail not rounded, with most of the curvature being on the dorsal side; 



stylet about 25-28u U 



U. Tail usually with long ventral terminal process; well developed 

 spherical spermatheca present 

 . erythrinae (Zimmermann, I90U) Golden, 1956 



syn: Tylenchus erythrinae Zimmermann, I90U 



Tylenchus psuedorobustus Steiner, I91U 



Aphelenchus dubius var. peruensis Steiner, 1920 



Tylenchus spiralis Cassidy, 1930 



Tylenchorhynchus robustus var. erythrinae (Zimmermann, I90U) 



Bally & Reydon, 1931 



Anguillulina multicincta in Goodey, 1932 nee Cobb, 1893 



Tylenchorhynchus multicinctus in Stekh. & Teunissen, 1938 nee 



Cobb, 1893 



Anguillulina erythrinae (Zimmermann, I90U) Goodey, I9U0 



Rotylenchus erythrinae (Zimmermann, I90U) Goodey, 1951 partim 

 Tail with or without short, blunt ventral terminal process; well de- 

 veloped spherical spermatheca absent 

 nanrrus (Steiner, 19U5) Andrassy, 1958 



Other species: 



H. iperoiguensis (Carvalho, 1956) Andrassy, 1958 - 

 syn: Rotylenchus iperoigiuensis Carvalho, 1956 



