Definition: Dorylaiminae. Small nematodes, about 1 mm.
or less long. Lips amalgamated, barely offset from body, anterior
end more of less truncate. Amphids stirrup-shaped, apertures no wider
than ampullae, and from 1/2 to 1/5 corresponding body-width. Oesophagus
said to widen abruptly at about its middle. Tails of both sexes cylindrical,
rounded or very short, hemispherical. Males have only the pair of
pre-anal supplements and none in the ventral series. Spicules not
dorylaimoid by more dagger-shaped, and almost straight, reminiscent of
those of Alaimus. Lateral guiding pieces absent. Female gonads
paired, opposed and reflexed.
Type species: Thornia steatopyga (Thorne & Swanger,
1936) Meyl, 1954
syn. Dorylaimus steatopygous Thorne & Swanger, 1936