Diagnosis

• Cuticle finely striated.
• Lip region truncated or offset,
• Inner labial sensilla papilliform.
• Outer labial and cephalic sensilla usually papilliform.
• Amphids with slit-like or oval aperture, stirrup-shaped fovea.
• Stoma tuibular or conoid with a single tooth.
• Pharynx anteriorly cylindrical with a distinct basal bulb that lacks valves.

Female:

• Didelphic, amphidelphic or mondelphic prodelphic.
• Ovaries reflexed or outstretched.

Male:

• Monorchic, testis outstretched.
• Spicules paired, symmetrical.
• Caudal glands and spinneret present or absent.

Ref: Holovachov, 2019.

References:

Holovachov, O., Bsotrom, S., Nadler, S.A., De Ley, P. 2009. Systematics and phylogenetic position of the genus Tricirronema Siddiqi, 1993 (Cephalobomorpha). J. Nematode Morphol. Syst., 12: 133-143.