27o 



Superfaraily TYLENCHOIDRA (Oerley, I88O) Chit. & Chit., 1937 



(Key to the families) 



1. Esophagus distinct 5 esophageal musculature present. = . « „ » . » . 2 

 Esophagus degenerate I esophageal musculature absent (animal para- 



2. Cuticle usually heavily annulated or squamous, often bearing 

 spines; spear greatly elongated. 



CFICGNmATIDAE Thome, 19l;3 (defined Thome, 19U9) P.2& 



Cuticle finely to moderately annulated, plain; spear short. .... 3 



3. Head with internal cephalic sclerotization 



HOPLOLAmiDAE (Filipj., I9UI) Wieser 1953 P. 37 



Head without internal cephalic sclerotization U 



U. Female swollen to saccate TYLEI-JCHULIDAE Raski, 1957 P.5U 



Female vermiform TYLENCHIDAE Oerley, 1830 ?.^^ 



5. Sucker-like vesicle at excretory pore .... MYENCHIDAE Pereira, 1932 

 Terminal excretory duct tubular . ALLANTONTiMATIDAE Chit. & Chit., 1937 

 syn. (?) CONTORT YLENCHIDAE (Ruhm, 19^6) Chitwood, 1958 



