Genus Discocriconemella
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)

Type species
        Discocriconemella limitanea (Luc, 1959) De Grisse & Loof, 1965

Species List

Species found:                       at
Discocriconemella inarata Kalsow Prairie, Iowa
D. limitanea Costa Rica