Coslenchus costatus
(de Man, 1921) Siddiqi, 1978
Photo Gallery- Konza Prairie
Photo Gallery- Nine-mile Prairie
Photo Gallery- Forensic Nematology

Body marked by coarse striae 2u apart, and about 20 longitudinal striae which divide the cuticle into minute tile-like elements.   Lateral field with crenate borders and 2 incisures.  Lip region set off by slight narrowing of head contour, with 4 annules.  Amphid aperatures at apices of lateral lips, visible only from face view. Spear 10u-12u long with strong knobs.  Spear muscles attached to sclerotized wall of lip region.  Deirid and excretory pore about opposite anterior end of basal bulb.  Vulva with conspicuous lateral membranes.  Anterior sexual branch with an 8-celled quadricolumella followed by a large cellular body which may function as a spermatheca separated from ovary by a distinct valve.  Ovary composed of a cap cell and 7 oocytes in single file.  Vulva-anus distance 2/3 tail length.  Terminus cuticularized , acute. Tail straight, a distinguishing character even under the dissecting microscope.

DNA Sequences Obtained
Specimen: Collected:
KonzaIII CC-105 Konza Prairie, First survey
KonzaI AB-32 Konza Prairie, First survey
WA-4 Washington
WA-3 Washington