Belongs within: Rhabditina.
The Cylindrocorporidae are free-living nematodes with an elongate stoma (Poinar et al. 2002).
Characters (Poinar et al. 2002): Lips normally six, inconspicuous; corpus distinctly set off posteriorly; valve present in corpus; vulva equatorial (40–60%); oviparous; spicules straight or slightly curved; gubernaculum straight or hooked proximally; lateral alae absent; eight to ten pairs genital papillae.
Cylindrocorporidae [Cylindrocorporoidea, Cylindrogastridae]
|--Cylindrocorpus Goodey 1939 [=Cylindrogaster Goodey 1927 non Stål 1855]PJ03
| |--C. curzii Goodey 1935PJ03
| |--C. erectus Massey 1960PJ03
| |--C. inevectus Poinar, Jackson et al. 2003PJ03
| |--C. longistoma (Stefanski 1922) [incl. C. coprophaga Goodey 1927]PJ03
| `--C. macrolaimus (Schneider 1866)PJ03
|--Myctolaimus Cobb 1920PJ03
| |--M. pellucidus Cobb 1920PJ03
| `--M. rifflei (Massey & Hinds 1970)PJ03
|--Goodeyus Chitwood 1933PJ03
| `--G. ulmi (Goodey 1930)PJ03
|--Protocylindrocorpus Rühm 1959PJ03
| `--*P. goodeyi Rühm 1959 [=Cylindrocorpus goodeyi]PJ03
`--Myctolaimellus Andrássy 1984PJ03
|--*M. walkeri (Hunt 1980) [=Cylindrocorpus walkeri]PJ03
`--M. robiniae Harman et al. 2000PJ03
*Type species of generic name indicated
References
[PJ03] Poinar, G. O., T. A. Jackson, N. L. Bell & M. B. Wahid. 2003. Cylindrocorpus inevectus sp. n. associated with the oil palm weevil, Elaeidobius kamerunicus (Faust) (Coleoptera: Curculionidae), with a synopsis of the family Cylindrocorporidae and establishment of Longibuccidae n. fam. (Diplogastroidea: Nematoda). Nematology 5 (2): 183–190.