1.09. 



29. Stoma short, i.U times longer than bread, vjith thick vjalis; lar'T;e 



gland accumulations in head region Anoncholainius Cobb, 1920 



Stoma longer than 1.5 tirnes the breadth, not srcaller tlian .L/30 of the 

 esophagus Pela -^onema Cobb, 1093 



Additions : 



Wieser, 1953 includes the following: 



A. genera without buccal armature: 



Curvolaimus Wieser, 1953 differs from all other genera lacking buccal 

 armature by its deeply cut lips, the curved walls of the buccal cavity, 

 the large amphids, the asymmetrical ovary and the filiform tail. 



B. genera possessing buccal armature: 



Oncholaimoides Chitwood, 1937 differs from all other genera by its 

 striated cuticle bearing longitudinal ridges broken by striae. 



Metoncholaimoides Wieser, 19^3 is distinguished frcm Metoncholaimus 

 by its symmetrical ovaries and from Adoncholainus by the enormously 

 elongated spicula and the absence of the gubernaculum. 



Subfamily EURYSTWiINAE Filipjev, 193U 

 (Key to the genera after Wieser, 1953) 



1. Esophagus with a number of distinct bulbi Eolbella Cobb, 1920 



Esophagus without bulbi ^ 



2. Cervical setae extremely long Ledovitia Eilipjev, 1925 



Cervical setae not abnormally long 3 



3. Two well developed supoleraents in male; buccal cavity with 1 to 2 



small, acute, subventral teeth . . ^ 



Supplements absent or built as simple elevations of the cuticle; 

 buccal cavity oncholaimoid, i.e. the two subventral teeth strongly 

 developed and with a broad base 5 



k. Caudal glands present Eurystomina Filipjev, 1918 



Caudal glands absent Pareurystomina Micol. and Kreis, 1930 



5. Buccal cavity with transverse rovis of denticles; accessory piece v;ith- 



out caudal apophysis Thoonchus Cobb, l'^20 



No transverse rous of denticles in the buccal cavity; accossory pit re 

 with strong apophysis Ditlevsenella Filipjev, 192':. 



