Definition: Rhabditinae. Most species are large and relatively
fat. Lips are usually distinct and form an open cup. Metarhabdions
isoglottid and each bears 3 equal teeth, all strongly developed.
Oeophageal collar usually present. Vulva usually median, ovaries
usually paired, opposed and reflexed. Female tail bluntly conical
or dome-shaped with or without a short spine. Male tail surrounded
by bursa which is often closed but the papillae are never radially arranged.
2 or 3 pairs of pre-anal papillae.
(Description- Goodey, 1963)