IS. 



Class ADEMOPHOR^^A (v.Linytovx, 1905) Chitwood, l^b'B 

 (Key to the orders modified from Chitwood, 19?0) 



1. Amphids spiral, circular, vesiculate, or other forms derivable from 

 spiral; subventral esophageal glands never openinfi near anterior end 

 of esophagus; caudal glands nearly always present 



"" CHRCKACOPTDA Chitwood, 1933 ^•'''6 



Amphids pocket-like, elongated, tuboid or pore-like; subventral 

 esophageal glands opening in anterior end of esophagus posterior to 

 nerve ring, caudal glands present or absent 2 



2. Setae on head usually present (absent in Mononchidae, Alaim.idae, and 

 a few scattered genera of other families); typical stylet absent; 

 esophageal gland orifices comjronly in stomatal region, glands iininu- 

 cleate; muscular caudal sucker absent; caudal glands usually present; 



ventral excretory cell usually present ENOPLIDA Chitwood 1933 P.lOl 



Setae absent; stylet present or absent; esophageal gland orifices at 

 anterior end of esophagus or posterior to nerve ring; muscular caudal 

 sucker present or absent; caudal glands absent; excretory system 



absent or poorly developed DORYLAXKIDA Pearse, 19U2 P.1?0 



