m. 



Subfamily CYTJNDROLAIMINAE Micoletzky, 1922 

 (Key to the genera including material from Wieser, 1956) 



1. Habitat marine 2 



Habitat fresh water or soil 6 



2. Esophagus with distinct muscular bulbar region, glands not free. . 3 



Esophagus posteriorly broken down with glands in tanderi 



Pseudaro-eolaimus Chitvxood, 1951 



3. Amphids snepherd's crook, with circular loop, or completely circular 



in outline Li 



Amphids consisting of an oval loop 5 



U. Ocelli and bulbar swelling in mid-esopha.::^s present 



Araeolaimus de Man, 1838 



Ocelli and bulbar swelling in mid-esophagus absent 

 Parachromagasteriella Allgen, 1933 



5. Cervical region elongate, amphids about 10 head diameters behind 

 anterior end 



Metaraeolaimoides de Coninck, 1936 



Cervical region not elongate, amphids at short distance behind 



anterior end 



Araelaimoides de Kan, 1893 



6. Male with caudal pocket; female unknown Colpurella Cobb, 1920 



Male without caudal pocket; female known 7 



7. Head with cephalic setae; spinneret present 8 



Head without cephalic setae; spinneret absent 10 



8. Ovaries two 9 



Ovary one Cylindrolaimus de Man, 1880 



9. Cephalic setae h Domorganus Goodey, 19U7 



Cephalic setae 10 Greenia Hoepple & Chu, 1932 



10, Ovaries two 11 



Ovary one Gymnolaimus Cobb, I9I3 



11. Tail conoid, acute Aulolaimus de Man, I88O 



Tail short, rounded Isolaimiujn Cobb, 1920 



