96. 



Subfamily CHOAMOLAIfilNAE Filipjev, 193ii 

 (Key to the genera after Wieser, 195U; 



1. No sclerotized structures or teeth between anterior and posterior 



portion of stoma Choanolaimus de Man, 1880 



Sclerotized structures or teeth between anterior and posterior 

 portion of stoma 2 



2. Male supplements big, chromadoroid • 3 



Male supplements absent, setose or papillose U 



3. Anterior end with flap-like appendages j posterior apophyses of buccal 



cavity weakly developed Latronema (Gerlach) VJieser, 195U 



Anterior end devoid of appendages; posterior aoophyses well developed 



Trogolaimus Cobb, 1920 



Uo Anterior end with flap-like appendages; supplements setose 



Gamnianema Cobb, 1920 



Anterior end devoid of appendages; supplements absent or papillose 

 5 



5» Cephalic satae in two circles, the anterior one consisting of four 

 setae (which is the reverse of the usual) ; pharyngeal bulb strongly 



developed . . Cobbionema Filipjev, 1922 



Cephalic setae if present in one circle; no pharyngeal bulb 



.• Hali choanolaimus de Man, 1886 



Wieser adds: 



" Bulbopharyngiella Allgen, 1929 and Demonema Cobb, 1893 a-'e 

 doubtful genera. By Chitwood, 195l> even Pteronium and Nunema Cobb 

 1933 were reckoned to this subfamily. Since, however, no figures are 

 know and Cobb referred the two genera to the Richtersiinae and 

 Chroma dorinae respectively, a decision should be postponed until 

 further data are known." 



f-ubfamily SELACHINPMA'I'INAE Cobb, 1915 

 (Key to the genera after Chitwood, 1951) 



1. Paired lateral mandibles 2 



With three mandibles , 3 



2. Mandibles non-retractible, each with h longitudinal rows of denticles 

 , , Selachinema Cobb, 1915 



Mandibles retractible, each claw-like with 7 terminal denticles 

 Cheironchus Cobb, 191? 



3. Mandibles with odd number of teeth ,,.,.. .Synonchiiim Cobb, 1920 

 Mandibles with even number of teeth Synonchiella Cobb, 1933 



