lUi. 



Order ENOPLIDA Chitwood, 1933 

 (Key to the superfaii'ilies from Chit. & Chit., 19^0) 



Cuticle of head duplicate; subventral esophageal gland orifices 

 near anterior end of esophagus or through teeth; male supplementary- 

 organs 0, 1, or 2 fflOPLOIDKA Stekh. & de Coninck, 1933 P. 101 



Cuticle of head not duplicate; subventral esophageal gland orifices 

 anterior or posterior to nerve ring; esophago-intestinal valve usually- 

 large and thick; male supplementary- organs usually 3 or more. (Fresh 

 or brackish water and moist soil) TRIPYLOIDEA Chitwood, 1937?. Ill 



Superfamily ENOPLOIDFA Stekhoven & de Coninck, 1933 

 (Key to families from Chitwood, 1951) 



1. Stomatorhabdions poorly sclerotized; without distinct stomatal cap- 

 sule; stoma surrounded by esophageal tissue . . .ENOPLIDAE Baird, 1853 P. 101 

 Stomatorhabdions heavily sclerotized; stoma somewhat capsulifonn, only 

 the posterior part surroimded by esophageal tissue 

 ... ONCHOLAIWIDAE Baylis & Daubney, 1926 P. 101 



Family ENOPLIDAE Baird, 1853 

 (Key to subfamilies) 



1. Stoma provided with three bifurcate mandibles 



, , . ENOPLINAE Micoletzky, 1922 P. 102 



Stoma without mandibles 2 



2. Cephalic setae in one circle of 10 3 



Cephalic setae in two circles of 6 plus U 



, OXYSTQviININAE (Micoletzky, 192U) P. 103 



3. Posterior portion of esophagus cellular in appearance 



PHANODEliMATINAE Filipjev, 1927 P.IOU 



Posterior portion of esophagus not appearing to be cellular 

 ". .LEPTOSCMATINAE Micoletzky, 1922 P.105 



Family ONCHOLAMIDAE Baylis & Daubney, 1926 

 (Key to subfamilies) 



1. Esophagus cylindroid ONCHOLAIMINAE Micoletzky, 1922 P. 107 



Esophagus conoid, crenate or multibulbar 2. 



2. Sexual dimorphism present; teeth slender, spine-like with narrow base 



ENCHTCLIDIINAE (Micoletzky, 192U) Rilipjev, 193U P.llC 



Sexual dimorphism absent; dorsal tooth broad with large base 

 EURYSTCMINAE Filipjev, 193U P. 10° 



