situated in a single ventro-median row.

Sensory papillae of Adenophoreas are in the cephalic region and along the body.

Generally, Adenophoreas have five esophageal glands.

Adenophorea are either marine, freshwater or terrestrial or three of them together or any two of them.

A number of these traits above are plesiomorphic, and thus unsuitable to discern relationships.