Swangeriidae Jairajpuri, 1964
Differ from nematodes in the Belondiridae by the usually asymmetrical odontostyle and; tail long to filiform.
Differ from those in the Dorylaimellidae by the non-flanged odontophore, the lack of perioral sclerotized platelets and the absence of glandular pores in the lateral field.
In a study of the muscular sheath surrounding the enlarged basal portion of the esopahgus, Hechler (1969) emended the description of the superfamily Belondiroidea (Thorne, 1964) as follows: "Esophageal expansion surrounded by a sheath of muscle bands which may lie parallel to the esophagus, spiral completely around it in a dextral or sinistral direction, or spiral slightly without completely encircling the esophagus".
Three subfamilies recognized:
Falcihastinae Siddiqi, 1968
Body length small to medium (1.8mm)
Lip region continuous with body contour, truncate, asymmetrical
odontostyle with small dorsal thorn at posterior end of aperture
dorsla gland posetrior, often in middle of cylindrus
Tail filiform in both sexes
Roqueinae Thorne, 1964
Long slender body, 4-6.5mm
Lip region rounded
dorsal esophageal gland located in anterior position
Female tail long, male tail short
Swangeriinae Jairajpuri, 1964
Small to large, slender nematodes.
Lip region amalgamated, sometimes asymmetrical.
Males and females with elongate to filiform tail.
Odontostyle longer than width of the lip rcgion.
Spiral muscle sheath around bulb sinistral.
Cardia elongate-cylindrical, with intestine attached to its posterior end.
Andrassy, I. 2009. Free-living Nematodes of Hungary III. Hungarian Natural History Museum, Budapest. 608p.
Coomans, A., Kheiri, A. 1986. Observations on Lindseyus costatus Ferris & Ferris, 1973 with a discussion on its realtionships (Nematoda: Belondiridae). Rev. Nematol 9:357-367.
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