De Grisse & Loof, 1965
|Neocriconema Diab & Jenkins, 1965
Neocriconema Diab, 1966
Acrozostron Orton Williams, 1981
Female: Morphologically diverse species having in common
an enlarged cephalic annule resembling a disc. Disc configuration
diagnostic, permitting placement of species in four groups. Body
180 - 490 um long, arcuate to C-shaped when relaxed. Annules
smooth or crenate, outline angular or rounded, R = 65 - 174.
Stylet of variable length, 33 - 113 um, rigid or flexible.
Amphid apertures small pore or slit-like. Submedian lobes weakly developed
when present. Rudimentary submedian lobes are reported for D.
degrissei, D. mineira, and D. morelensis. Vulva
usually closed, occasionally open. Postvulval part rounded
to elongate-conoid, sometimes curved dorsally.
Male. Known for six species. All have conoid
or rounded lip region surmounted by a distinct knob or disc, which seems
to be a rudimentary head disc. Lateral field with two or four lines.
Tail varies in shape from rounded to conical: the terminus is with or without
a short projection.
(Discription-emended Vovlas, 1992)
Macroposthoniinae. Female: Body 0.18
- 0.49 mm long, arcuate to C-shaped when relaxed. Annules 65-174,
with round or angular outline and smooth, rough or crenate margins, often
numerous, fine crenate and with anastomoses. Cephalic annule appearing
as a large, anteriorly flattened disc, being wider than and separated
by a collar from adjacent body annule; disc indented dorsally and ventrally
or rarely circular, with submedian pseudolip areas projecting beyond its
contour in some species; six pseudolips indistinct, being fused into this
disc. Submedian lobes absent. Amphid apertures small pore-
or slit-like or large oval. Stylet short (33-66 um or exceptionally
long (99-113 um) in D. baforti) rigid or flexible. Vulva
closed, lips not modified. Postvulval body part short rounded
or elongate narrow, sometimes curved dorsally. Male:
Lateral field narrow, with two, three or four incisures. Cephalic
region tapering, smooth, surmounted by a distinct disc or knob of thickened
cuticle. Bursa low, indistinct or absent. Juveniles:
Annules crenate, without scales or spines.
(Description- Siddiqi, 2000)
Discocriconemella limitanea (Luc, 1959) De Grisse & Loof, 1965