Obligate plant parasite with obese body, that of the female being spiral in form and practically immobile, while the male is straighter and more active.  Striae usually visible only on the neck region.  Lateral fields indistinct, consisting of narrow bands marked by numerous minute incisures which often are invisible on well-developed specimens.  Spear 8 to 10 u long, with small basal knobs.  Esophagus of gravid female frequently with abnormally developed glandular structures.  Between the nerve ring and the basal bulb is a secondary "storage" gland, set off from the bulb by a definite constriction.  In this the dorsal gland secretions apparently collect until it may become greatly distended; or the secretions may be used and the gland reduced to a small ovate swelling.  Cardia small, often obscure.  Ovary greatly developed, usually with two flexures, the oocytes arranged about a rachis.  In cross section the ovary appears as a pulpy cellular tissue surrounded by a relatively thin layer of developing oocytes.  A spherical spermatheca lies adjacent to the outlet of the ovary.  The posterior uterine branch also serves as a spermatheca.  Several eggs, each about as long as the vulva body width, may be present in the oviduct at one time.
     Testis with one or two flexures, the spermatocytes arranged about a rachis.  Spicula broad, short.  Gubernaculum thin, trough-like.  Bursa enveloping tail.
(Description- Thorne, 1961

DNA Sequences Obtained

Specimen:	Collected:
USDA 1975-30	Wheat galls- USDA Lab
USDA 1975-33	Wheat galls- USDA Lab