Carebara panhai

The type series was collected from a cave at twilight zone about 3m from the entrance.

Identification
New species is most similar to Carebara pygmaea. Both species share the following characteristics of major workers:
 * frons with longitudinal striation, while vertex with transverse striation
 * frontal carinae with 3 pairs of erect hairs
 * masticatory margin with 5 teeth (including large apical tooth)
 * antenna 11-segmented with 2-segmented club
 * promesonotum in profile view distinctly convex to form a dome
 * promesonotal suture indistinct
 * propodeal spine short, usually shorter than its base.

However, C. panhai can be easily distinguished from C. pygmaea by the following characteristics:
 * in major workers, frons, vertex dorsa of petiole and post-petiole and first gastral tergite with dense erect hairs (without erect hairs in C. pygmaea)
 * lateral face of pronotum largely smooth and shiny (punctate and reticulate in C. pygmaea)
 * propodeum in minor workers largely smooth and shiny (entirely punctate in C. pygmaea).

Distribution based on Regional Taxon Lists
Oriental Region: Thailand.

Nomenclature

 * . Carebara panhai Jaitrong, Pitaktunsakul & Jantarit, 2021: 9, figs. 1, 2 (s.w.) THAILAND.
 * Type-material: holotype major worker, 4 paratype major workers, 60 paratype minor workers..
 * Type-locality: holotype Thailand: Kanchanaburi Prov., Thong Pha Phum Dist., Sahakhom Nikhom Community Forest, 14.76255556°N, 98.80966667°E, 3 m. from cave entrance, 27.xi.2019 (W. Jaitrong); paratypes with same data.
 * Type-depositories: TNHM (holotype); SKYC, TNHM (paratypes).
 * Distribution: Thailand.