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Scanning electron micrograph of the posterior end of a male adult S. digitata. A pair of lateral appendages near the posterior terminal end of the body is present (asterisk). The papillar arrangement; 3 pairs of precloacal papillae (white arrows), a pair of adcloacal papillae (white arrow heads) and 3 pairs of postcloacal papillae (black arrows), plus a central papilla just in front of the cloaca (black arrow head).
