^h. 



Farpily TYI.^NCmiLIDAK Raski, 1957 

 (Key to subfamilies from Raski, 19 37) 



Excretory pore located posterior to normal position near nerve ring; 

 male stylet degenerate. . . Subfamily TYLENCHULINATi; Skarbilovich, 19U7 P. 51; 

 Excretory pore normal, near nerve rin'^; male stylet lacking 

 Subfamily SPHA'-'KUNHviatINAR Raski & Sher, 1952 P.5U 



Subfamily TYLMCKUlJiJAE Haski & Sher, 1952 

 (Key to genera) 



Lip region with circumoral elevation; excretory core not closely 

 approximated to vulva Trophotylenchulus Raski, 195? 



(Contains a single species, T. floridensis Raski, 195?) 

 Lip region without circumoral elev^ation; excretory pore closely 

 approximated to vulva Tylenchulus Cobb, 1913 



(Contains a single soecies, T. semipenetrans Cobb, 1913) 



Subfamily SPHAP^P^ONFWATINA^ Raski & Sher, 1952 

 (Key to genera) 



Female spiral, thickened Trophonema Raski, 195? 



(Contains a single species, T. arenari'.im (Raski, 1956) Raski, 



1957) 

 Female spherical Sphaeronema Raski & Sher, 1952 P.5U 



Genus Sphaeronema Raski S- Sher, 1952 

 (Key to species) 



Lip region with circumoral elevation. . minutissimum J.B. Goodey, 1958 

 Lip region without circumoral elevation 

 californicum Raski & Sher, 1952 



