81. 



Suoerfamily PLnCTOIDFA Chit. & Chit., 1937 

 (Key to the families after Chitwood, 1951) 



1. Posterior region of esophaj'^s muscular j stoma cylindrical or conoid .2 

 Posterior region of esophagus glandularj stoma minute or absent 

 CMA COLA m IDA E Stekhoven & de Coninck, 1933 -^.^'2 



2. Esophagus terminated by a distinct "gamma" valved biilb 



PLECTIDAE Oerley, 1580 P. 82 



Bulbar region of esophagus with or without a "chromadoroid" valved 



bulb LEPTOLAIMIDAE Oerley, 1880 P. '2 



Appendix to PLECTOIDEA (after Chit. & Chit., 1950) : 



BASTIANIIDAE Stekhoven & Teuinissen, 1938. Stoma very long and 

 narrow, surrounded by esophageal tissue, or stoma rudimentary; esoph- 

 agus cylindrical, greatly elongate; amphids circular to unispiral; 

 ovaries reflexed. Contains one genus, Bastiania de Man, 1876. 



Family CAFlACOLAIMIDAE Stekhoven & de Coninck, 1933 

 (Key to the subfamilies after Chitwood, 1951) 



Amphids anterior to cephalic setae (Marine) 



CA>ULCOLAIMINAE Micoletzky, 192U P. 83 



Amphids posterior to cephalic setae (Marine or fresh water) 

 APHANOLAMINAE Chitwood, 1935 P-83 



Family PLECTIDAE Oerley, lu80 

 (Key to the sulafamilies after Chitwood, 1951) 



Labial region with web-like or other modifications 



WILSONMATINAE Chitwood, 1951 P-^U 



Labial region without specialized modifications 

 PLT5CTINAE Micoletzky, 1922 P.8U 



Family LEPTOLAIMIDAE Oerley, 1880 

 (Key to the subfamilies after Chitwood, 1951 & 1956) 



1. Amphids large, circular to unispiral 2 



Amphids minute, pore-like RHABDOLAIXINAE Chitwood, 1951 ^'85 



2. Esophagus with non- valved bulb LEPTOLAIMINAR Chitwood, 1951 



Esophagus with a "chromadoroid" valved bulb 

 HALIPLECTINAE Chitwood, 1951 P-55 



