Strumigenys amnesia Bolton, 2000

Strumigenys amnesia Bolton, 2000: 838 (w.) WEST MALAYSIA. Indomalaya.

Material examined

THAILAND – Trang Province • 2 workers; Khao Chong; 7.54401° N, 99.80087° E; 25 Dec. 2018; IBBL members leg.; Winkler, 4 corners; IBBL • 22 workers, 3 queens; Khao Chong; 7.54525° N, 99.79203° E; 26 Dec. 2018; IBBL members leg.; Winkler, 4 corners; IBBL • 24 workers, 1 queen; same collection data as for preceding.

Measurements

Workers

TL 2.3–2.5, HL 0.62–0.66, HW 0.54–0.59, MandL 0.28–0.31, SL 0.34–0.38, EL 0.046 –0.055, PW 0.24– 0.28, ML 0.56–0.61, PL 0.22–0.26, PH 0.10–0.13, DPW 0.10–0.11, PPL 0.11–0.15, GL 0.49–0.54, CI 86–89, MI 45–47, SI 61–65, OI 8–10, LPI 47–50, DPI 40–47 (n =6).

Queens

TL 2.7, HL 0.63–0.66, HW 0.59–0.61, MandL 0.29–0.30, SL 0.34–0.37, EL 0.097 –0.109, PW 0.31– 0.33, ML 0.68–0.70, PL 0.27–0.28, PH 0.12–0.13, DPW 0.15, PPL 0.13–0.14, GL 0.64–0.67, CI 92–95, MI 43–46, SI 57–60, OI 16–18, LPI 43–47, DPI 53–57 (n =3).

Geographic range

Indonesia (Sumatra), Malaysia (Peninsular), Thailand (Trang).

Ecology

Collected in primary and old secondary forests.

Comments

Bolton (2000) noted that workers from Thailand and Sumatra (HL 0.64–0.69, MandL 0.28–0.33, SL 0.35–0.39) were slightly smaller than the type specimens from Malaysia (HL 0.72–0.76, MandL 0.34– 0.36, SL 0.42–0.44). The workers from Thailand we measured (HL 0.63–0.66, MandL 0.29–0.30, SL 0.34–0.37) also had morphological measurements that fell within the typical range reported by Bolton.