Female: Labial region rounded, striated, offset, roughly
quadrangular to prominently four lobed in en face view; labial disc
more often prominent; subdorsal and subventral lip sectors distinct; lateral
lip sectors reduced or absent. Amphid aperture small slit laterally directed.
Stylet long (50 to 160 um), strong. Lateral field with three lines, areolated.
Tail hemispherical-spiked, rarely conoid. Phasmids postanal.
Male: Spicules most generally with prominent flanges. Gubernaculum
Diagnosis.- Dolichodorinae. Body straight to slightly arcuate
when relaxed. Cuticle with fine but distinct annules formed by deep
striae. Lateral fields completely areolated, with three incisures
reducing to one and finally disappearing towards the extremities.
Lip region striated, prominently four-lobed, offset by a deep constriction,
anteriorly with four large smooth areas surrounding an offset circular
oral disc; lateral lips or areas absent, amphidial apertures longitudinally
elongate, situated between subdorsal and subventral lip areas (see Sher
and Bell, 1975). Sclerotization of basal plate massive. Spear
exceptionally elongated, with tubular conus markedly longer than the shaft.
Spear guide elongated, tubular. Precorpus often swollen with convoluted
lumen. Excretory pore well anterior to hemizonid. Vulva not
raised; vaginal sclerotization appearing symmetrical in lateral view.
Female tail convex-conoid anteriorly, spicate posteriorly; terminal portion
not annulated; phasmids a little behind anal level. Post-rectal intestinal
sac present. Juvenile tail similar to that of female. Male
tail short, conical, with a trilobed bursa whose lateral lobes are well
developed, striated and posteriorly tapering. Spicules robust, with
distal half appearing claw-like due to large flanges. Gubernaculum
also robust, protrusible.
Type-species: Dolichodorus heterocephalus Cobb, 1914.
Other species: D. minor Loof & Sharma, 1975;
nigeriensis Luc & Caveness, 1963; D. profundus Luc,
1960; D. pulvinus Khan, Seshadri, Weishcer & Mathen, 1971;
D. silvestris Gillespie & Adams, 1962; D. similis Golden,