Subfamily STILBONn^iATINAE Cliitwood, 1936 

 (Key to the genora from Chitwood, 195l) 



i. Cuticular pores present (on lateral lines). . . Lentonemella Cobb, 1920 

 Cuticnlar pores absent ~~. ', ', '. ', ~ .... 2 



2. Fiale with acorn-like supplements Stilbonema Cobb, 1920 



Male wibiiout acom-like supplements Laxonema Cobb, 1920 



Others : 



Catanema Cobb, 1920 



Subfamily RICHTERSIINAE Cobb, 1933 

 (Key to tribes after Chitwood, 1936) 



1. Dorsal tooth absent; cuticle bearing longitudinal rows of hooks 



Tribe RICHT^KSIACPA Kreis, 1929 



(Contain one genus Richtersia Kreis, 1929) 



Dorsal tooth present, very well developed; cuticle sometimes bearing 



rows of bristles Tribe M^TTACHROMADOKAC^ Chitwood, 1936 P. 99 



Dorsal tooth minute or absent; cuticle smooth or nearly so, without 



rows of bristles Tribe SPIRINACEA Chitwood, 1936 P. 99 



Subfamily CERAMON'^l-JlTINAE (Cobb, 1933) 

 (Key to the genera from Chitwood, 19^1) 



1. Cuticle with transverse plates 2 



Cuticle with deeply overlapping plates 3 



2. Cephalic setae thick Dasynemoides Chitwood, 1936 



Cephalic setae thin Dasynemella Cobb, 1933 



3. Annules 700-1000 Pristionema Cobb, 1933 



Annules 80-300 U 



U. Cephalic setae four Pselionema Cobb, 1933 



Cephalic setae ten Ceramonema Cobb, 1920 



Subfamily MONOPOSTHIINAE Filipjev, 193U 

 (Key to the genera after Wieser, 195) i) 



1. Ovary unpaired 2 



Ovary paired Hhinema Cobb, 1920 



2. Spicula reduced; accessory piece unpaired, narrowed proximally 



Monooosthia de Man, 1339 



Spicula present, paired, slender; accessory piece unpaired, lar'^e, 

 dilated distally Nudora Cobb, 1920 



