77. 



Superfamily MONHYSTEfiOTDSA Chit. & Chit.^ 1937 

 (Key to families from Chitwood, 19^1) 



1. Stoma styletifom .,.,., SIP0N0LAE4IDAE Chitv;ood, 1937 P. 77 



Stoma not styletiform 2 



2. Radial muscles of esophagus diffuse without cuticular attachment 



points MONHYSTERIDAE Oerley, 1880 P. 77 



Radial muscles of esophagus in .six bands with cuticular attachment 



points often present , . . . .LIMO^'OEIDAE Filipjev, 1929 P. 7 7 



Family SIPHONOLABilDAE Chitwood, 1937 

 (Key to genera after Wieser, 1956) 



1. Spear present .,.,..... . Siphonolaimus de Man, 1393 



Spear absent 2 



2. Pharyngeal portion of esophagus attenuated, esophagus very short 



(b= more than 50), isthmus extremely narrow . Solenolaimus Cobb, 1893 

 Pharyngeal portion of esophagus not attenuated; the latter of normal 

 length (b= about 10), isthmus not much narrower than corpus, or, if 

 so, bulb broken down and esophageal glands free 3 



3. Bulbar region of esophagus well developed . . Southernia Allgen, 1929 

 Bulbar region of esophagus broken down, esophageal glands free 

 Cyartonema Cobb, 1920 



Family MONHYSTERIDAE Oerley, 1880 

 (Key to subfamilies from Chitwood, 1951) 



Stoma non-sclerotized, usually conoid into esophagus. Lips three, 

 low, cuticle not ridged; internal circle of sensory organs papilloid. 



(Freshwater or marine) MONHYSTERINAE Micoletzky, 1922 P. 78 



Stoma sometimes sclerotized. Lips 3 or 6; cuticle striated 

 XIALINAE Chitwood, 1951 P. 79 



Family LINHOMOEIDAE Filipjev, 1929 

 (Key to subfamilies from Chitwood, 1951) 



Stoma small; esopha^o-intestinal valve elongate 



, LINHOMOEINAE Filipjev, 1929 P. 80 



Stoma massive, globoid; esophago-intestinal valve short * 

 ... SPHAEROLAIMINAE Filipjev, 1929 P-81 



