Genus Ethmolaimus
de Man, 1880
Photo Gallery- Pemaquid Beach Park, Maine

Definition:  Cyatholaiminae.  Cuticle with transverse striae carrying small punctations of uniform size throughout.  Amphids spiral; at about level of stoma base but variable in position.  Head not offset, rounded anteriorly, with 6 indistinct lips each with a small papilla, 4 setae on head.  Stoma in 3 parts, the first short and widish with 12 longitudinal ribs, the second slightly narrower but no longer, the third long and narrower and consisting of 3 longitudinal ribs each ending anteriorly in a tooth.  The second and third sections are enclosed in a stomatal capsule which is clearly separated from the oesophagus.  Oesophagus anteriorly cylindrical and ending posteriorly in a pear-shaped, valvate bulb.  Oesophago-intestinal cells present.  Nerve ring is just beyond 1/2 oesophageal length.  Excretory pore just behind the nerve ring and leading to a cell lying ventral to the beginning of the intestine.  Tail in both sexes tapering, terminal duct and caudal glands present.  Vulva median; gonads paired, opposed and reflexed.  Testes and spicules paired.  Gubernaculum composed of 2 lateral pieces joined beneath the spicules by a U-shaped piece.  Male with 9-24 supplements.  Both sexes have various scattered bristles over the whole body.

Type species:  Ethmolaimus pratensis de Man, 1880
    Syn.:    E. tatricus Daday, 1896
               Chromadora revaliensis, G. Schneider, 1906
               E. revaliensis, (G. Schneider, 1906) Steiner, 1913
               E. lemani Hofmänner, 1913
               C. foreli Hofmänner, 1913
               E. foreli (Hofmänner, 1913) Hofmänner, 1915
               Triodontolaimus alpinus Micoletzky, 1913
               C. (Parachromadora) alpina (Micol., 1913) Micol., 1914
               E. americanus Cobb, 1914
               E. arcticus Steiner, 1916
               E. gracilicaudatus N.A. Cobb in M.V. Cobb, 1915
               E.Maduei Micoletzky, 1922