For the varieties and modifications of the trophi we simply refer to Hudson's figure above.
The relative size of the crop to the trophi varies greatly; it is small where the trophi are well developed and complex, as well as in Bdelloidea; but in Flosculariaceae it is large, and so it is in Asplanchnaceae.
Asplanchnaceae; trochus circular; foot absent or minute; trophi incudate; stomach blind; males frequent, not very dissimilar to females.
Oral funnel produced into a fine tube hanging freely into a pharyngeal cup, containing the uncinate trophi.
Trophi virgate exsertile; germary paired; genito-urinary cloaca opening above the neck in the male, subapically in the female.
