^xy:. 



Subfamily LKPl'DSOiATINAE Kicoletzky, 1922 

 (Key to the genera after WiesePj 1953) 



1. Cephalic capsule and stomodaeal capsule absent or weakly developed, 

 cephalic suture not or hardly visible. Buccal armature consisting at 

 most of one small tooth 2 



Cephalic and stom.odaeal capsule well developed, cephalic suture 

 always conspicuous. Buccal armature as above or consisting of 

 several teeth, plates, mandibles, or dentated ribs 11 



2. Cephalic setae 3 head diameters long 3 



Cephalic setae not more than 1 head diameter in length \x 



3. Buccal cavity absent Barbonema Filipjev, 1927 



Buccal cavity (and minute teeth?) present. . . Tubolaimella Cobb, 1933 



U. Lateral cervical setae present . 5 



Lateral cervical setae absent 8 



5. Cervical setae arranged in two to three transverse circles 



Platycomopsis Ditlevsen, 1926 



Cervical setae arranged in two short longitudinal rows 6 



6. Gubemaculum and supplementary organ in male well developed 



Anticoma Bastian, 1865 



Gubemaciilura present or absent, supplementary organ absent or 

 vestigial .............. ....7 



7« Gubemaculum present, supplement absent or vestigial. Excretory pore 

 situated on a cuticular projection 



. Paranticoma Micoletzky and Kreis, 1930 



Gubemaculum and supplement abseivET Secretory pore norm.al 



Anticomopsis Micoletzky and Kreis, 1930 



8. Two longitudinal rows of "pits" present Ant opus Cobb, 1933 



"Pits" absent , .9 



9. Tail clavate Leptosomella Filipjev, 1927 



Tail cylindrical or conical, rounded or acute at tip 10 



10. Ocelli present. Cephalic setae papillose 11 



Ocelli absent. Cephalic setae well developed 



• Leptosomatina Allgen, 1951 



11. Gubemaculum small, no supplements Leptosomatum Bastian, 1865 



Gubemaculum large, supplements present. Leptosomatides Filipjev, 1918 



12. Buccal armattire consisting of three mandibles each provided with an 

 acute tip .13 



Buccal armature never consisting of three mandibles 15 



13. Tail filiform with acute tip Triodontolaimus de Man, 1393 



Tail short, cylindrical, rounded at tip or clavate Ill 



