0-) 

 /J • 



Subfamily hlCROLAII-INAE Micoletzky, 1922 

 (Key to the genera after Wiessr, ISSWj 



1. Peribuccal portion of the esophagus of a structure different from 

 that of the postbuccal part (cuticularizGd?), perhaps functioning 

 as a sort of grinding apparatus; one exceedingly sraall tooth 



present . « Crassolaimus Kreis, 1929 



No differentiation of the peribuccal tissues; buccal cavity and 

 armature better developed ... . 2 



2. First circle of cephalic setae very sraall; amphids circular 



Microlaiinus de Man, 1880 



First circle of cephalic setae as long as second circle; amphids oval 

 ....««...» ^ « . . . Paramicrolaimus Wieser^ 195U 



Subfamily TRIPYLOIDINAE Micoletzky, 192U 

 (Key to the genera after Wieser, 1956) 



1. Buccal cavity large and deep; lips deeply incised 

 . . Bathylaimus Cobb, 1893 



:synj Cothinolaimus , Macrolaimus Ditlevsen, 1919 



Parabathylaimus de Coninck & Stekhoven, 1933 

 Bathylaimoides Allgen, 19U7 

 Buccal cavity more narrow; lips not deeply incised 2 



2, Buccal cavity with teeth or cuticular projections 



o ,.,..,... Tripyloides de Man, 1886 



syn. Tripyla Bu-tschli nee Bastian 

 Nannonchus Cobb, 1913 

 Buccal cavity unarmed; more shallow and more narrow than in the fore- 

 going genus Paratripyloides Stekhoven, 19^0 



