U7. 



Subfamily HOPLOLAIMINAF. Filipjev, 193U 

 (Key to the genera) 



1. Phasmids extremely large, scutellum-like 2 



Phasmids normal, small, pore-like 3 



2. Transverse striae continuing across lateral fields; spear knobs 



anteriorly furcate and pointed Hoplolaimus Daday, 1905 ^'hl 



Central field of lateral field smooth, without transverse striae; 



spear knobs rounded Scutellonema Andrassy, 19^8 P'^8 



3. Esophageal glands forming a distinct bulb 



Tylenchorhynchus Cobb, 1913 ^'h9 



Esophageal glands free in body cavity, overlapping intestine ... I4 



il. Tail length approximately equal to anal body diameter $ 



Tail length at least twice as long as anal body diameter. 7 



5» Dorsal gland orifice usually less than 1/3 or more of stylet length 



froi/i base of stylet 6 



Dorsal gland orifice 1/3 or more of stylet length from base of stylet 

 length from base of stylet Helicotylenchus Steiner, 19U5 P»?2 



6. Lip region longitudinally striated; gubemaculum bear titillae 



Rotylenchus Filipjev, 1936 ^•^^ 



Lip region with transverse annules only; gubernacultim without 



titillae Gottholdsteineria Andrassy, 1958 P'53 



7. Esophageal glands extending far back over intestine 



Radopholus Thome, 19U9 ^'53 



Esophageal glands only slightly overlapping intestine 

 Pratylenchoides Winslow, 1958 



(Contains a single species P. crenicauda Winslow, 1958) 



Genus Hoplolaimus Daday, 1905 

 (Key to the species) 



No lateral field except at each end of body where annules are slight- 

 ly interrupted in lateral line proporicus J. Goodey, 1957 



Lateral fields present tylenchiformis Daday, 1905 



sjn: Hoplolaimus coronatus Cobb, 1923 



Genus Rotylenchus Filipjev, 1936 

 (Key to the species) 



Phasmid located slightly anterior to anus 

 robustus (de Man, I876) Filipjev, 1936 



syn: Tylenchus robustus de Man, 1876 



Tylenchorhynchus robustus (de Man, I876) Micoletzky, 1929 partim 



Hoplolaimus uniformis Thome, 19U9 

 Phasmid located 2 anal body diaraeters anterior to anus 

 ,gracilidens (Sauer, 1958) Sauer, 1958 



