Carebara colobopsis

The type series of this species was collected from leaf litter in a lowland dry evergreen forest. It is only known from the type locality in Cambodia.

Identification
Carebara colobopsis can be distinguished from the other species in the genus by the following characters:

Major Worker
 * truncated head
 * posterolateral corner of head with a horn
 * 9-segmented antennae
 * distinct metanotum and deep metanotal groove
 * propodeal declivity with lamella laterally

Minor Worker
 * longer head
 * 9-segmented antennae
 * smooth surface of promesonotum
 * deep metanotal groove
 * propodeum armed with a long acute tooth
 * propodeal declivity with lamella and petiolar venter with lamella along its length

This species belongs to the C. acutispina group. In the major worker it is easily distinguished from the other Asian members of the genus by the combination of the following conditions:
 * the anteriorly truncated head
 * posterolateral corner of head with a horn
 * 9-segmented antennae
 * distinct metanotal disc
 * deep groove in front of the disc
 * developed propodeal spines
 * laterally lamellate propodeal declivity

Minor workers characteristically have lamellae on the venter of the petiole and on the lateral margins of the propodeal declivity (the lamella on the propodeal declivity involves propodeal spine and extends anteriad up to the anterior margin of the propodeal dorsum as a low carina), and sparse erect hairs on the body.

Distribution based on Regional Taxon Lists
Oriental Region: Cambodia.

Nomenclature

 * . Carebara colobopsis Hosoishi & Yamane, 2022: 361, figs. 1-3 (s.w.) CAMBODIA.

Type Material

 * Holotype (major worker); Cambodia: Siem Reap Province, Local Forest Administration plot, 13°43'47"N, 104°02'38"E, 13. XII. 2012, S. Hosoishi leg., SH12-Cam-135 (collection code KUECANT031). – KUEC.
 * Paratypes: 2 major workers (collection code KUECANT032, KUECANT033) (KUEC), 4 minor workers (collection code KUECANT034, KUECANT035, KUECANT036, KUE-CANT037) (KUEC), same data as holotype.