Mylonchulus incurvus
(Cobb, 1917) Andrassy, 1958
Photo Gallery- Konza Prairie

L = 1.3 mm; a = 45; b = 3.9; c = 40; V = 75
L = 1.23 mm; a = 44; b = 3.8; c = 37; T = 39

Female.  Body curls in  open "C" when relaxed by heat; with blunt anterior termini and arcuate-digitate posterior termini.  Buccal cavity finely striated with massive dorsal tooth in upper third of cavity opposed by numerous denticles arranged in seven transverse rows.  Also opposite dorsal tooth are two subventral teeth located just posterior to denticles.  Buccal cavity globular with thick walls slightly more than twice as long as wide.  Amphid apertures at level of dorsal tooth, narrow, about one fourth as wide as cavity. Esophagus typical with nontuberculate teminus.  Didelphic, often with two eggs in each uterus.  Eggs about one and a half times longer than wide.  Two pairs of pre- and post-vulval papillae usually visible.  Tail conoid-arcuate with smoothly curved dorsal surface and ending with digitate terminus.  Three caudal glands in tandem emptying into terminal spinneret.  Three pairs (two ventral and one dorsal) of caudal pores located on digitate portion of tail.

Male.  Similar to female in details of lip region, buccal cavitiy, and esophagus, except amphid aperture of male is wider and slightly more posterior than that of the female.  Ten supplements plus adanal pair, equally spaced and beginning within range of spicule.  Spicule arcuate and slender with bidentate termini; accessory pieces bifurcate.  Gubernaculum crescent-shaped with thickened keel-like area at center.  Other details of caudal region similar to those of female.

Habitat.  A common species about the roots of many kinds of plants in uncultivated areas of stream and ocean banks and also in cultivated areas, particularly nursery sites.
Oregon distribution.   Ash Valley, Cape Meares, Corvallis, Forest Grove, Hood River, Hoskins, Lewisburg, Netarts, Pacific City, Woods, and numerous sites along coastal stream banks.

(Description- Jensen and Mulvey, 1968)

DNA Sequences Obtained
Specimen: Collected:
KonzaIV BC-141 Konza Prairie, First survey