Plecoptera Species File (Version 5.0/5.0)
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Characters to separate taxa in Plecoptera

        An artificial key to adults of Plecoptera of the World
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.

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