Characteristics of Secernentea are:

 

• Excretory system is tubular

• Cuticle is striated in two to four layers; lateral field is present

• Three esophageal glands; esophageal structure varies

• Males generally have one testis

• Caudal alae are common

• Sensory papillae are cephalic only; may be caudal papillae in males

• Mostly terrestrial