Other Collections:
9 Females (California-a):  L = 0.61 mm (0.44-0.76); a = 15.0 (11-17);b = 3.9 (3.3-4.4); c = 36.1 (23-46); vulva = 95 (94-96); stylet = 94 um (83-108); prorhabdion = 69 um (64 - 79); total body annules = 136 (123-149).
1  Larva¹ (California-a):  L = 0.56 mm; a = 16; b = 3.8; stylet = 82 um; prorhabdion = 63 um; total body annules = 151.
3 Larvae² (California-a):  L = 0.34 mm (0.33-0.36); a = 10.9 (10-13); b = 2.7; stylet = 62 um (58-66).
1 Female (California-b): L = 0.58 mm; a = 16; b = 3.8; c = ?; vulva = 96; stylet = 92 um; prorhabdion = 71 um; total body annules = 142.
3 Females (California-c): L = 0.61 mm (0.53-0.67); a = 13; b = 3.7 (3.4-4.0); c = ?; vulva = 96 (95-96); stylet = 99 um (97-101); prorhabdion = 78 (76-81); total body annules = 144 (139-149).
2 Females (Idaho):  L = 0.85-0.89 mm; a = ?; b = 4.1; c = 24; vulva = 94; stylet = 90-96 um; prorhabdion = 68-73 um; total body annules = 129-130.
Female:  Body shape distinctive, almost cylindrical throughout, tapering only slightly anteriorly, imperceptibily or not at all posteriorly, with bluntly rounded hemispherical head and tail. First 2-3 annules more or less compressed and close together, varying perhaps due to fixation.  Sublateral lobes lacking; labial disc prominent, stands out to edge of outline of head.  Oral opening prominent, I-shaped, amphids large, ovate, at edge of labial disc.  First annule slender, about 13 um across, non-retrorse.  Second annule slightly larger, about 15-16 um across and also non-retrorse. Third annule about 19 um across may or may not be retrorse and begins to resemble succeeding body annules.  Head framework strong, extends to level of fourth annule.  Stylet robust, 96 um (83-107); basal portion of stylet and knobs somewhat longer than usual, 22 um (18-28); knobs 11-12 um across with forwardly directed processes.  Esophagus with long isthmus and spatulate posterior bulb.  An esophageal-intestinal valve seems to be present extending into the lumen of the intestine, composed of several small lobes.  Excretory pore on 34-43rd annule, 132-197 um from anterior end.  Gonad outstretched, single flexure posteriorly 46 um long noted in one specimen.  Spermatheca present but no spermatozoa observed.  Vulva with simple, rounded lips projecting only to contour of body; slender, oval in outline with slightly undulating edge of anterior lip.  Vulva located on 7th -10th annule from terminus difficult to count exactly because final 2-3 annules are not precisely defined or separated.  Anus on 4th -7th annule from terminus, usually 1-3 annules posterior to vulva. Annules prominent, 4.3 - 8.7 um , with very finely crenated edge more or less noticeable in different specimens and populations.  Anastomosis of annules occasional, no evidence of lateral field.
Larva¹ (fourth-stage?) closely resembles adult female.  Excretory pore on 43rd annule, 154 um from anterior end.  Crenations on posterior edge of annules irregular but nore noticeable than on adult.
Larva² (third stage?) with excretory pore on 44th annule, 120 um from anterior end.  Crenation on edge of annules even more prominent and with regular longitudinal markings into cuticle.
Hosts and localities:  Soil about the roots of: (c) manzanita, Arctostaphylos sp., and (b) mountain misery, Chaemobodium sp., Pyramid Ranger Station, elevation 5,500', El Dorado county, California; (a) manzanita, Arctostaphylos patula Greene, 10 miles east of Baxter on U.S. Highway 80, Placer County, California; host unknown, Nickel Plate Butte, Kanikso National Park, Idaho.
(Description- Raski & Golden, 1965)