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If Anisopodidae, body segments light - 2 species.
-Anal area large, ventrally occupies 1,2 and 3 rings, it is situated on ventral, lateral and partly dorsal surface on the second ring - S. cincta
- anal area small, ventrally occupying second ring, a small part of 1 ring and a little more than a half of 3 ring. Anal area on the 2 ring is situated on ventral and lateral surfaces only - S. fenestralis
:)