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17. Clypeus (a1-a3) set off by distinct sutures, and shape strongly modified: semicircular in shape (a1), several times broader than long (a2), or strongly protruding (a3).
many Omphale Haliday, 1833
17'. Clypeus either not set off by sutures (aa1) or set off by faint sutures (aa2) but shape unmodified: length about equal to width, not strongly protruding or distinct from face in any other way (a different color from rest of face in a few species).
a3 | ||
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aa1 | aa2 |
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Image credits: a1-3: Hansson (1996a). aa1: Hansson (1987). aa2: Hansson (1994b).