According to the original description (Green1896) adult female grayish brown or rusty brown, marginal areas light brown. Body broadly oval to round, median area raised, convex, hemispherical in lateral view. Ventral surface concave, forming cavity for crawlers.
Taiwansaissetia formicarii is unique among the species treated here with 3 or usually 4 differentiated stigmatic setae, filamentous dorsal setae, tubular ducts restricted to areas between the legs, and a convex body form.
U.S. quarantine notes
Current concepts of this species most likely involve a complex of entities including diverse material intercepted at U. S. ports-of-entry. This species was intercepted 13 times at U.S. ports-of-entry between 2002 and 2012, with specimens originating from Cambodia, India, Malaysia, Thailand and Vietnam. We also have exaimed older quarantine specimens from Thailand on Mangifera. ScaleNet includes hosts in over 30 plant families from Afrotropical (Madagascar) and Oriental zoogeographic regions. Taiwansaissetia contains only 1 species.