Median
bulb with valves.
Isthmus may be separated from glandular bulb by a constriction.
Esophageal glands
may or may not overlap the beginning of the intestine.
Females: Mature females swollen or not swollen.
Oocytes of Subanguina are in two rows, not as multiple rows
arranged around a rachis as in Anguina; columned uterus with four
long rows of cells (about eight/twelve cells per row).
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