Body as open spiral when relaxed. Lateral fields marked by 4 incisures. Phasmids usually arranged with one anterior at near 30%, the other posterior at near 80%. Lip region set off by constriction, bearing five annules. Cephalic framework massively sclerotized. Spear 23u long with strong rounded knobs. Basal bulb slightly overlapping intestine dorsally. A thick walled spermagonium present. Intestine not extending into tail. Tail contour more curved dorsally, with 10 annules.
Aorolaimus torpidus is immediately recognized by the conoid, strongly annulated, well set off lip region, spermagonium in uterine tract and dorsally convex tail contour.