Genus Ditylenchus

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ORDER RHABDITIDA
INFRAORDER TYLENCHOMORPHA
            Family Anguinidae
                        Genus Ditylenchus

"Body length about 0.4-1.5 mm, all stages vermiform. Cephalic skeleton weak, stylet delicate. Median bulb muscular or non-muscular, with or without refractive thickenings. Basal glandular bulb offset from intestine or forming lobe of variable length overlapping the intestine. Overlap usually short and nuclei of glands anterior to pharyngeal-intestinal junction. Ovary outstretched, with one or two rows of oocytes. Columned uterus with four rows of four cells. Spermatheca axial, elongated, 16-celled. Post-vulval sac usually large.Bursa adanal to subterminal, never enclosing tail end. Tail usually elongate conoid, sometimes filiform." Bert and Borgonie, 2006

Genus Ditylenchus Filip’ev, 1936

“Median bulb with or without valve; isthmus not separated from glandular bulb by a constriction; glandular bulb short or long, when long may overlap the intestine for a short or long distance. Ovary short or long, sometimes reaching esophageal region and/or flexed; oocytes in one/two rows; columned uterus with four rows of four cells; post-uterine sac (PUS) present or absent. Testes usually without flexures; caudal alae leptoderan, short adanal or long, but never reaching tail end. Mature female not or slightly swollen. Mycetophagous or parasites of higher plants, found in soil or above ground.” From Powers and Mullin website http://nematode.unl.edu/

References:

Bert, W.and G. Borgonie. Order Rhabditida: Suborder Tylenchina.  2006.  In: Eyualem Abebe, Traunspurger W., and Andrassy I. (eds) Freshwater Nematodes: Ecology and Taxonomy. CABI Publishing, Cambridge, MA, pp. 681, 683

Powers T. and P. Mullin. Plant and Insect Parasitic Nematodes. University of Nebraska Nematology Website. http://nematode.unl.edu/