Saileriolidae is a family of true bugs and is considered a

basal Basal or basilar is a term meaning ''base'', ''bottom'', or ''minimum''. Science * Basal (anatomy), an anatomical term of location for features associated with the base of an organism or structure * Basal (medicine), a minimal level that is nec ...

or "primitive" family within the stink-bug lineage. They are found only in Asia. Originally included within the family

Urostylididae Urostylididae is a family of true bugs and is considered a basal or "primitive" family within the stink-bug lineage. They are found only in Asia. Older works used the spelling Urostylidae but this clashes with the name used for a protozoan family ...

,China, W.E., Slater, J.A. (1956) A new subfamily of Urostylidae from Borneo (Hemiptera: Heteroptera). Pacific science, 10(4): 410–414. the group has recently been recognized as a separate family-rank lineage.

References

Shield bugs Heteroptera families {{Pentatomoidea-stub