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General Description

Males (length = 19.6 mm) are brachypterous, but females (length = 31.4 mm) are long-winged. Males have genital hooks darkly sclerotized at their tips and arising from lateral angles of Tergum 10. Males also have a raised knob or "hammer" on Sternum 9. The female subgenital plate is broadly rounded, usually with a shallow median recession and is little produced over Sternum 9. The subgenital plate has a row of spinules along its posterior margin. Nymphs have anal gills and an occipital ridge composed of spinules.

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© University of Alberta Museums

Source: University of Alberta Museums

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