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The genus Deficephalobus De Ley & Coomans, 1990 (Cephalobina: Osstellidae) from nature reserves in Costa Rica

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image of Nematology
For more content, see Nematologica.

Two species of the genus Deficephalobus, D. mirabilis sp. n. and D. desenderi, are described and illustrated on the basis of material collected in Costa Rica. The new species is characterised by 0.67-1.2 mm long body; bluntly rounded labial region; amphidial aperture one-third of labial region diam. wide; cheilostom barrel-shaped with sclerotised, bar-shaped, cheilorhabdia; gymnostom barrel-shaped with moderately sclerotised lining of gymnostom; stegostom funnel-shaped anteriorly, narrow tubular posteriorly and subdivided into four sets of rhabdia; basal bulb elongate ovoid with weakly developed valvular apparatus; excretory pore opening anterior to nerve ring; ovary tip almost reaching the level of rectum, large spermatheca, postvulval uterine sac shorter than vulval body diameter; female tail elongate conoid and straight, with filiform tail terminus; male tail short conoid with small, ragged, terminal mucro.


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