Rhabditida is an order of free-living, zooparasitic and phytoparasitic microbivorous nematodes (roundworms).

Order include 8 superfamilies.
Diagnosis:

Oral aperture with 2, 3 or 6 lips. Stoma has five departments ( cheilostoma, prostoma, mesostoma, metastoma and telostoma). Pharynx divided on corpus, isthmus and bulbus. Midgut is oligocytosis. Nematodes have three rectal glands. Muscular system is meromyaric, with platymyaric cells. Сervical gland H-form, but some species have supliment excretory glands on the posterior part of body.
Males sometimes have bursa with rib- like papillies or another supliments.