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Complex genitalia present consisting of a combination of hooks, vesicles, epiproct and internal organs (males) or a subgenital plate of various forms (females) | Without complex genitalia or subgenital plate. |
Spiracles present. | Absent. |
Wings present, full length or shortwinged (brachypterous) or wingless (apterous). | Wings absent, developing wing tissue contained within wingpads for macropterous and brachypterous species/sexes. |