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Diagnosis: Leptonchus Cobb, 1920
“Nematodes of small to medium size, 0.7-1.5 mm. long. Cuticle typical tylencholaimoid, with irregularly outlined inner layer and abundant radial refractive elements. Body pores arranged in two rows along margins of lateral chord. Lip region cap-like, offset by constriction. Cheilostom a truncate cone, often with developed circumoral thickenings. Odontophore usually arcuate. Pharyngeal expansion bulb-like, pyriform, occupying about one-fifth of total neck length. Female genital system didelphic. Vulva transverse. Pre-rectum very long, its junction with intestine anterior or posterior at level of vulva. Male with dorylaimid spicules and 5-7 spaced ventromedian supplements. Tail similar in sexes: short, rounded to conoid. Goseco et al. 1974 provided the most recent revision of the genus.” Peña Santiago, 2006.
Peña Santiago R. 2006. Dorylaimida Part I: Superfamilies Belondiroidea, Nygolaimoidea and Tylencholaimoidea. In: Eyualem Abebe, Traunspurger W., and Andrassy I. (eds) Freshwater Nematodes: Ecology and Taxonomy. CABI Publishing, Cambridge, MA, pp. 326-391
Powers T. and P. Mullin. Plant and Insect Parasitic Nematodes. University of Nebraska Nematology Website. http://nematode.unl.edu/