Key to Lepisiota species from Thailand

Key to the Thai species of Lepisiota based on worker caste (modified from Jerernkong et al., 2023).

1

 * Dorsa of head and pronotum smooth and shiny or reticulate, with smooth and shiny interspaces (Figs 2B, 5A)
 * Dorsa of head and pronotum densely punctate (Figs 1B, 3B)

2

 * Propodeum without spines or denticles; petiole without spines (Fig. 5B); dorsum of mesosoma without standing hairs Lepisiota rothneyi


 * Propodeum with spines or denticles; petiole with a pair of sharp spines (Fig. 5C–D); dorsum of mesosoma with standing hairs

3

 * Masticatory margins of mandibles with five teeth, including largest apical tooth followed by 2 small teeth, medium-sized prebasal tooth, and small basal tooth; body entirely yellow; posterior margin of head broadly convex Lepisiota chutimae
 * Masticatory margins of mandibles with five teeth, including largest apical tooth, followed by medium-sized preapical tooth, a small tooth, medium-sized prebasal tooth, and small basal tooth; body entirely black or dark brown; posterior margin of head almost straight medially Lepisiota siamensis

4

 * Head, mesosoma, petiole, and gestral segment I yellow, remaining gastral segments dark brown; posterior clypeal margin straight medially (Fig. 1A) Lepisiota bicolor


 * Head and gaster dark brown; mesosoma and petiole reddish brown; posterior clypeal margin feebly concave medially (Fig. 3A) Lepisiota thepthepae