obsolete nematode adult lumenal stage true nematode adult lumenal phase OBSOLETE. An adult life-stage of a soil-transmitted nematode such as Trichuris sp. in which the anterior portion (whip-like end) is threaded into the tissue mucosa and the posterior of the male and female worms emerges free into the intestinal lumen to facilitate feeding, mating, and subsequent egg deposition. 2016-04-27T17:13:57Z This term was made obsolete because this is an anotomical part and not a life-stage. WBls:0000722 jl16 worm_development