122. 



Family BELONDIPIDA'? Thorne, 1939 

 (Key to the genera modified from Thorne, 1939) 



1. Cuticularized pieces present about vestibule. Dorylaimellus Cobb, 1913 P. 123 

 Cuticularized pieces not present about vestibule 2 



2. Tails blimtly rounded or conical 3 



Tails filifoim . 6 



3. Pharynx armed with a mural tooth U 



Pharynx armed with an axial spear 5 



U. Ovary one Nygellus Thome, 1939 



(Contains a single species, N. clavatus Thome, 1939) 

 Ovaries two . . , Nygolaimellus Loss, 19U9 



5. Anterior portion of esophagus set off by constriction 



c .......... . Axonchium Cobb, 1920 P.12U 



Anterior portion of esophagus not set off by constriction 



Belondira Thorne, 1939 P. 125 



6. Basal portion of esophagus and cardia normal. . . Oxydirus Thome, 1939 P. 122 

 Basal portion of esophagus greatly reduced, cardia long, isthmus-like 

 .... o ...,.,...,., Swangeri Thome, 1939 



(Contains a single species S, fragilis Thorne, 1939) 



Genus Oxydirus Thome, 1939 

 (Key to the species from Thome, 1939) 



1, Ovaries two, supplements contiguous 



.... .... oxycephaloides (de Man, 1921) Thorne, 1939 



Ovary one, supplements spaced 



............... oxycephalus (de Man, 1885) Thome, 1939 



