Key to Seira species from Madagascar with truncate unguiculus

1. Body pale with dark blue pigments on femur III distally (Fig. 12); Th II with series m and p with 2 (m1–2) and 0 mac, respectively (Fig. 14A); Abd IV with 7 central mac (B3 absent), and laterally with one group of about 14 mes beetween E–Fe series (Fig. 15B); manubrial plate with 4 blunt chaetae (Fig. 16H)................................ S. metafemurata sp. nov.

- Body with different pigments pattern (Figs 2, 7); Th II with series m and p with 4 (m1, m2– 2i, m4) and 3 (p1–3 present) mac, respectively (Figs 4A, 9A); Abd IV with 8 central mac (B3 present), and laterally lacking mes group (Figs 5B, 10B); manubrial plate with all chaetae pointed, without modifications (Fig. 6G)................................................. 2

2. Body with violet pigments on Th II anteriorly (Fig. 2); dorsal head with A5 and M1 mac, S3 as mic (Fig. 3E); Th III devoid of central mac (Fig. 4B).............................................................. S. lepidochaetosa sp. nov.

- Body with irregular dark pigments on Th III to Abd IV (Fig. 7); dorsal head with A5 and M1 mic, S3 as mac (Fig. 8B); Th III with 2 (p2 and p3) central mac (Fig. 9B)................................................ S. semicaerulea sp. nov.