Leptonchus granulosus
Cobb, 1920
1.2 mm; a = 26; b = 4.6; c = 79; V = 60
Body slightly arcuate when relaxed. Subcuticle coarsely striated,
frequently separated from outer layer. Lateral cords 1/3 body width
with 2 rows of coarse pores. Lip region cap-like, set off by constriction.
Amphids beaker shaped, almost as wide as head. Spear very slender,
often slightly curved with indistinct aperture. Spear extensions
well developed. Esophagus a slender tube with fusiform to pyriform
basal bulb. Intestine a conspicuous feature because it is only 2
to 5 times longer than body width. Prerectum extending forward past
reproductive system, a most unusual feature of this species. Vulva
transverse with muscular labia. Ovaries reflexed half way to vulva.
Eggs about 3 times body width, forcing ovaries out of position when present.
Males not found in this area, and very infrequently in other regions where
associated females do not contain sperms.
Leptonchus granulosus is immediately recognized by the elongated
prerectum and very short, hemispheroid tail.
Habitat: A common inhabitant of virgin and cultivated soil from
Nebraska to eastern Montana, Minnesota, Iowa and the Dakotas.
DNA Sequences Obtained
