

IT'*. O 



Subfamily TTLENCHOLAIMJNii^ Filiojov, 19.3Jf . ' ^^; 

 (Key to the aienera) X*"' « ,. -^^^ 



lo Ovary one 2 



Ovaries two . 3 



2. Anterior portion of esooha'rus non-piuscular, distinct from basal en- 

 larged portion; spear with basal flanges. . . Discomyctus Thome, 1939 ^'-lE^? 

 Anterior portion of esophagus muscular, not distinct from enlarged 

 portion; spear with basal knobs ...... . Tylencholaimus de Man, I876 P.l?7 



3. Spear extensions with small basal knobs . . TylencholaijTius de Man, I876 P.l^? 

 Spear extensions rod-like or flan'^d. ..,...., k 



U. Cuticularized guidins; ring simple; lips with four cuticularized pieces 



about vestibule Heterodorus Altherr, 1952 



(Contains a single species) H. ma mi fens Altherr, 1952 



Cuticualrized guiding ring double; lips without cuticularized pieces 

 Enchodelus Thome, 1939 P. 158 



Genus Discomyctus Thome, 1939 

 (Key to the species from Thome, 1939) 



1. Vestibular disc set off by deep constriction. . cephalatus Thorne, 1939 

 Vestibular disc set off by depression only 

 longicaudatus (Imamura, 1931) Thorne, 1939 



Genus Tylencholaimus de Man, I876 

 (Key to the species modified from Thome, 1939) 



1. Lip region set off distinctly 2 



Lip region rounded, not set off in any manner .11 



2. Body length near 1.0 mm 3 



Body length near 0,5 mm 8 



3. Tail dorsally convex and subdigitate 



. . brevicaudatus (Tarjan, 1953) Tarjan, 1956 



Tail conoid to hemispherical , , k 



U. Female tail irregularly conoid 



....... mirabilis (Butschli, I873) de Man, I876 



Female tail uniformly conoid to hemispherical . 5 



5. Ovary single ,....•,... 6 



Ovaries two teres Thorne, 1939 



6. Ovary posterior to vulva zeolandicus de Man, 1876 



Ovary anterior to vulva ..... 7 



