80, 



Subfariiy l/Ii'lHO! OhIINAK 

 (Key to tlie -'ericra Tpodified from U'if^-sor, 19^5'-) 



1. Cephalic ssbae absent K'etalair.ius Kreis, 1926 



Cepnalic setae present 2 



2. Cephalic setae U 3 



Cephalic setae 8, in tvjo circles, h setae in each 



Ele utherolaimus Filipjev, 1922 

 Cephalic setae 10-12, in 1-2 circles 13 



3. Buccal cavity absent, or, if small vestibulijin present, the latter not 



cuticularized, cup-shaped, small h 



Buccal cavity present 5 



U. Ksopha:3us markedly differentiated into corpus, isthmus and bulb 



Par at ^rschf^llin^-'ia Kreis, 192U 



Esophagus not markedly differentiated . ~. ^ Terschellingia de Man, 1388 



5. Buccal cavity armed with one to several teeth 6 



Buccal Cavity unarmed 9 



6. Buccal cavity long and narrow, regularly cylindrical 



Southemiella Allgen, 1932 



Buccal cavity cup-shaped, irregular, never regularly cylindrical . . 7 



7. Esophagus strongly dilated but no true bulb. Tail with flagellum 



. o ProsphaerolaJjnus Filipjev, I9I8 



Esopha'7us with true bulb. Tail conical, without fla^ellvm 8 



8. Buccal cavity with cutici'lar rings. Supplements slight elevations of 



preanal cuticle Synonema Cobb, 1920 



Buccal cavity without cuticular rings. Supplements big, cup-shaped 

 Aponchium Cobb, 1920 



9. Buccal cavity conical to cup-shaped, never longer than wide. . . . ;10 

 Buccal cavity long and wide, cylindrical without constriction. . . .12 



10. Esophageal bulb present 11 



Esophageal bulb absent flhadinema Cobb, 1920 



11. Buccal cavity with transverse cutictilar bands 



Desmolaimus de Man, 1880 



Buccal cavity without transverse cuticular bands 

 Metalinhopioeus de han, 1907 



12. Amphids opposite posterior portion of buccal cavity 



Tubolaimua Allgen, 1929 



Amphids opposite anterior portion of buccal cavity 

 Latilaimus Allgen, 1933 



13. Tail with sublateral rows of conoid appendages. . . Halinema Cobb, 1920 

 Tail without conoid appendages Ih 



