2.0 mm; a = 34; b = 3.4; c = 80.0; V = 56
2.3 mm; a - 38; b = 3.7; c = 71; T = 56
of the genus. Cuticle marked by fine transverse striae. Lip
region 1/3 width of neck base.
Basal portion of esophagus with dense, muscular tissues, completely
obscuring all 4 submedian gland nuclei. Lateral field at first narrow
with 6 pores to a point opposite middle of esophagus, then expanding to
half body width. Row of indistinct pores along ventral side of lateral
field and a few scattered ones on dorsal side. Ventromedian series
of about 30 pores a prominent feature. Vulva
a transverse slit with muscular labia. Vagina 2/5 body width. Ovaries
reflexed almost to vulva. Sperms not observed in uteri but may have
been hidden by dense body tissues. Prerectum length 4-5 times body
width. Male slightly arcuate in posterior portion with well developed
testes containing masses of sperms.
Akrotonus is probably most closely
related to Makatinus Heyns, 1965 from which it differs in cuticle
type, transverse vulva, almost straight spicula and few supplements.
Habitat: Native pasture, Cottonwood
Experiment Station, South Dakota.