Female: body forms a cyst; Prominent cephalic framework and stylet; Anterior neck-like region; swollen body shape - lemon, round, or pyroid shape (about 0.5-0.6 mm diam).
Weak cephalic framework; moderate stylet with small rounded knobs; Metacorpus enlarged and fills neck region; Diovarial, prodelphic; coiled or reflexed; Vulva subterminal; anus terminal.
Posterior region important taxonomically:
vulval cone
vulva position
presence or absence of bullae (blister-like internal projections of the body wall)
fenestra - thinner areas in cuticle - may break down to allow juvenile emergence - bifenestrate, circumfenestrate.
Male: Vermiform, 1-1.5mm length; Sclerotized cephalic framework, rounded head cap; Strong stylet; knobs project forward; Esophagus Tylenchid, overlaps ventro-laterally; Reproductive system monorchic.
Curved spicules; No bursa; Tail bluntly rounded.
Source:
See UC Davis weblink
