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Male genitalia of the Thereus oppia species group. Lateral view of capsule and penis (top) with penis tip enlarged and ventral view (bottom). Posterior of insect to the right 15 Thereus orasus (arrow points to ventral brush organ) 16 Thereus lomalarga (arrow points to position of small teeth) 17 Thereus oppia 18 Thereus brocki. Scale bars: 0.5 mm.
