to Nagelus Menu
& Malek, 1968
Many diagnostic features for species separation cannot be observede by
Cephalic framework moderately sclerotized.
SEM face view broadly oval, and laterally
elongated, with labial disc partially or completely fused with first
Lip annule sectors also partially or completely fused
between the first annule and labial disc. The remaining lip
annules without longitudinal grooves or indentations.
present in the lateral field
at a level where the field has six lines.
Tail irregularly conoid, with a distal hyaline part.
not protruding from
[Ref: Fortuner & Luc (1987), Powers et al., (1983).]
Fortuner & Luc, Rev. Nematol. 10(2):183-202 (1987)
Powers, T.O., Baldwin, J.G., Bell, A.H. 1983. Taxonomic limits of the
genus Nagelus (Thorne and Malek, 1968, Siddiqi, 1979 with a description of
Nagelus borealis n.sp. from Alaska. J. Nematology 15:582-593.