Genus Leptonchus

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ORDER DORYLAIMIDA
            Family Leptonchidae
                        Genus Leptonchus

 

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. 

References:

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/