Microdorylaimus angleus
Andrassy, 1986
Synonym: Eudorylaimus angleus Thorne, 1974
Measurements (from Thorne, 1974)
L = 0.5 mm; a = 25; b = 3.0; c = 16; V = 56
Description (from Thorne, 1974)
Body forming an open "C" when relaxed, tapering
both ways from near middle. Lateral field 1/3 body width. Lip
region very angular, set off by deep constriction, with prominent papillae.
Spear about 11 um long with aperture occupying about 1/4 its length.
Guiding ring very narrow, about 1/2 head width. Spear extensions
joining esophageal lumen near middle of a conspicuous muscular bulb.
Esophagus a clear, slender tube, then expanded in basal 2/5. Cardia
discoid, then elongate conoid. Intestinal cells filled with unusually
large, dark brown, refractive granules. Vulva longitudinal, without
sclerotized labia. Ovaries reflexed about 1/2 distance back to vulva.
An egg was 18x60 um. Prerectum about 1 1/2 times body width.
Tail arcuate to subacute terminus. No sperms present in gravid females
and males probably are absent.
Microdorylaimus angleus is distinctive because
of its small size, very angular lip region, conspicuous bulb surrounding
junction of spear extensions and esophageal lumen, and elongate-conoid,
sub-acute tail.
Habitat: Hillside thicket west of Wilmot,
South Dakota.
DNA Sequences Obtained
