Genus Rhabdolaimus
de Man, 1880
Definition:  Rhabdolaiminae.  Cuticle with fine transverse striae.  Lateral fields absent.  Amphids small and rather inconspicuous.   Head flatly rounded, very lightly offset, without lips, papillae or setae.  Stoma simple, furnished with 3 minute denticles in the anterior part and followed by a long, tapering tube lined by 3 rod-like thickenings and surrounded by a forward extension of the oesophagus.  Latter almost cylindrical but narrowing to a short isthmus and swelling out  into a terminal, pyriform, muscular bulb containing a valve apparatus.  Tail in both sexes long and tapering, ending in a long terminal duct through which the caudal glands open.  Vulva nearly equatorial,  gonads paired and opposed.  Spicules stout and rather broad anteriorly. Gubenaculum absent or represented by 2 local thickenings in the floor of the cloaca.  No papillae in caudal region of either sex.  Males are rare.

Type speciesRhabdolaimus terrestris  de Man, 1880

Species found:      at:
R. terrestrisddd Long's Peak (by Thorne, 1925

Other species:
    R. aquaticus  de Man, 1880
    R. baltonicus  Daday, 1894
    R. brachuris  Meyl, 1954
    R. minor  Cobb, 1914

Bionomics:  Found in damp soil and sand, and in fresh water, feeding habits unknown.