Crematogaster rothneyi

Crematogaster rothneyi is known from South Asia to Southeast Asia, making it one of the most widely distributed ant species in Asia. However, the species is rarely encountered in the field (Hosoishi & Ogata, 2019).

Identification
This species is very similar to Crematogaster yaharai, but can be distinguished by the broader than long antennal segments V to VI, sculptured mesopleuron, and reticulately or areolately sculptured propodeum. The Indian specimen examined does not have distinctly developed longitudinal rugulae on the higher half of the dorsal surface of the head. The Thai specimens have broader or as broad as long antennal segments V and VI and a sculptured propodeal dorsum (Hosoishi & Ogata, 2019).

Distribution based on Regional Taxon Lists
Indo-Australian Region: Indonesia, Philippines. Oriental Region: Bangladesh, Cambodia, India, Myanmar, Thailand, Vietnam. Palaearctic Region: China.

Nomenclature

 *  rothneyi. Crematogaster rothneyi Mayr, 1879: 685 (w.) INDIA.
 * [Crematogaster rothneyi Smith, F. 1873: viii. Nomen nudum, attributed to Mayr.]
 * Imai, et al. 1984: 6 (k.).
 * Combination in C. (Acrocoelia): Emery, 1922e: 151.
 * Combination in C. (Crematogaster): Bolton, 1995b: 166.
 * Senior synonym of civa: Hosoishi & Ogata, 2019: 6.
 * Current subspecies: nominal plus haputalensis.
 * civa. Crematogaster rothneyi var. civa Forel, 1902c: 203 (w.) INDIA.
 * Combination in C. (Acrocoelia): Emery, 1922e: 151.
 * Combination in C. (Crematogaster): Bolton, 1995b: 166.
 * Junior synonym of rothneyi: Hosoishi & Ogata, 2019: 6.

Taxonomic Notes
The syntype workers of C. rothneyi civa match well with syntype workers of C. rothneyi. We treated C. rothneyi civa as a junior synonym of C. rothneyi (Hosoishi & Ogata, 2019).