Belongs within: Nematoda.
Contains: Aphanolaimidae.
The Plectida are a group of terrestrial and aquatic free-living nematodes with cephalic setae, a cylindrical stoma and unispiral amphids. Members of the superfamily Leptolaimoidea have somatic sensilla connected to prominent hypodermal glands, and the pharynx lacks pharyngeal tubes.
<==Plectida [Leptolaimina]
|--HaliplectoideaLB02
| |--HaliplectidaeLB02
| |--AulolaimidaeLB02
| `--Manunema Gerlach 1957L86 [PeresianidaeLB02]
| `--M. proboscidisL86
|--CeramonematoideaLB02
| |--TarvaiidaeLB02
| |--TubolaimoididaeLB02
| `--CeramonemaL02b [CeramonematidaeLB02]
| `--C. carinatumL02b
|--PlectoideaLB02
| | i. s.: AnaplectusFB90
| | WilsonemaFB90
| |--ChronogasterFB90 [ChronogasteridaeLB02]
| |--MetateratocephalidaeLB02
| `--PlectidaeLB02
| |--Oligoplectus Taylor 1935H62
| | `--*O. succini (Duisburg 1862) [=Anguillula succini]H62
| |--Vetus Taylor 1935H62
| | `--*V. duisburgi Taylor 1935H62
| `--Plectus Bastian 1865H62
| |--*P. parientinus Bastian 1865H62
| |--P. antarcticusW02
| |--P. aquatilisBG-M11
| |--P. palustrisL02a
| |--P. rhizophilusBG-M11
| `--P. tenuisBG-M11
`--Leptolaimoidea [Halaphanolaimidae]LB02
|--RhadinematidaeLB02
|--AegialoalaimidaeLB02
|--DiplopeltoididaeLB02
|--ParamicrolaimidaeLB02
|--OhridiidaeLB02
|--BastianiidaeLB02
|--OdontolaimidaeLB02
|--RhabdolaimusFB90 [RhabdolaimidaeLB02]
|--AphanolaimidaeHZ02
`--LeptolaimidaeHZ02
| i. s.: Anomonema Hopper 1963L86
| `--A. haplostomaL86
| Setostephanolaimus Tchesunov 1994HZ02
| Antomicron Cobb 1920HZ02
| Leptolaimoides Vitiello 1971HZ02
| Procamacolaimus Gerlach 1954HZ02
| `--*P. acer Gerlach 1954B02
| Stephanolaimus Ditlevsen 1919HZ02
|--Camacolaiminae [Camacolaimidae]HZ02
| |--Anguinoides Chitwood 1936HZ02
| |--Onchiolistia Blome 2002B02
| | |--*O. multipapillata Blome 2002B02
| | |--O. africana (Furstenberg & Vincx 1988) [=Procamacolaimus africanus]B02
| | `--O. tubifera (Gerlach 1953) [=Procamacolaimus tubifer]B02
| `--Listia Blome 1982 [incl. Eontolaimus Furstenberg & Vincx 1988]B02
`--LeptolaiminaeHZ02
|--Halaphanolaimus Southern 1914HZ02
| `--H. luridusHZ02
`--Leptolaimus de Man 1880HZ02
|--L. (Alveolaimus Alekseev & Rassadnikova 1977)HZ02
|--L. (Boveelaimus Alekseev & Rassadnikova 1977)HZ02
`--L. (Dermatolaimus Steiner 1916) [incl. Tubulaimus Alekseev & Rassadnikova 1977]HZ02
*Type species of generic name indicated
References
[B02] Blome, D. 2002. Five new genera of free-living marine nematodes from sandy beaches of eastern Australia. Memoirs of the Queensland Museum 48: 29–43.
[BG-M11] Borgonie, G., A. García-Moyano, D. Litthauer, W. Bert, A. Bester, E. van Heerden, C. Möller, M. Erasmus & T. C. Onstott. 2011. Nematoda from the terrestrial deep subsurface of South Africa. Nature 474: 79–82.
[FB90] Freckman, D. W., & J. G. Baldwin. 1990. Nematoda. In: Dindal, D. L. (ed.) Soil Biology Guide pp. 155–200. John Wiley & Sones: New York.
[HZ02] Holovachov, O., A. Zullini, P. A. A. Loof & T. Bongers. 2002. Morphology and systematics of the genus Anonchus Cobb, 1913 (Nematoda: Leptolaimina) and reappraisal of the family Aphanolaimidae Chitwood, 1936 n. rank. Nematology 4 (6): 725–757.
[H62] Howell, B. F. 1962. Worms. In: Moore, R. C. (ed.) Treatise on Invertebrate Paleontology pt W. Miscellanea: Conodonts, Conoidal Shells of Uncertain Affinities, Worms, Trace Fossils and Problematica pp. W144–W177. Geological Society of America, and University of Kansas Press.
[L02a] Lee, D. L. 2002a. Life cycles. In: Lee, D. L. (ed.) The Biology of Nematodes pp. 61–72. Taylor & Francis: Florence (Kentucky).
[L02b] Lee, D. L. 2002b. Cuticle, moulting and exsheathment. In: Lee, D. L. (ed.) The Biology of Nematodes pp. 171–209. Taylor & Francis: Florence (Kentucky).
[LB02] Ley, P. de, & M. Blaxter. 2002. Systematic position and phylogeny. In: Lee, D. L. (ed.) The Biology of Nematodes pp. 1–30. Taylor & Francis: Florence (Kentucky).
[L86] Lorenzen, S. 1986. Nematoda: Interstitial nematodes from marine brackish and hypersaline environments. In: Botosaneanu, L. (ed.) Stygofauna Mundi: A Faunistic, Distributional, and Ecological Synthesis of the World Fauna inhabiting Subterranean Waters (including the Marine Interstitial) pp. 133–142. E. J. Brill/Dr W. Backhuys: Leiden.
[W02] Wharton, D. A. 2002. Nematode survival strategies. In: Lee, D. L. (ed.) The Biology of Nematodes pp. 389–411. Taylor & Francis: Florence (Kentucky).