Ectomomyrmex javanus

Distribution based on Regional Taxon Lists
Indo-Australian Region: Indonesia, Philippines. Oriental Region: Cambodia, India, Taiwan. Palaearctic Region: China, Japan, Republic of Korea.

Japan (Kyushu (southern part), Tsushima I., Nansei Is).

Biology
This species  nests  under  stones  at  forest margins. Workers may be found foraging individually on the ground; they do not form trails, and are able to sting painfully.

Nomenclature

 *  javana. Ectomomyrmex javanus Mayr, 1867a: 84, pl. 2, fig. 9 (w.q.) INDONESIA (Java). Ogata, 1987: 113 (m.). Combination in Pachycondyla (Ectomomyrmex): Emery, 1900d: 667; in Ectomomyrmex: Bingham, 1903: 86; Wheeler, W.M. 1921c: 530; in Pachycondyla: Brown, in Bolton, 1995b: 306; in Ectomomyrmex: Schmidt & Shattuck, 2014: 193. Senior synonym of cambodjana, denticeps, horni, japonica, maternus, sundaicus, tonkina: Yasumatsu, 1962: 94. See also: Bingham, 1903: 87.
 * sundaicus. Ectomomyrmex sundaicus Mayr, 1867a: 85 (q.) INDONESIA (Java). Junior synonym of astuta: Bingham, 1903: 86; of javana: Yasumatsu, 1962: 94.
 * maternus. Ectomomyrmex javanus r. maternus Forel, 1900d: 321 (diagnosis in key) (w.) INDIA. Forel, 1922: 90 (q.). Combination in Pachycondyla (Ectomomyrmex): Emery, 1901a: 46. Raised to species: Bingham, 1903: 87. Subspecies of javana: Emery, 1911d: 79; Wheeler, W.M. 1913e: 233; Forel, 1922: 90. Junior synonym of javana: Yasumatsu, 1962: 94.
 * japonica. Pachycondyla (Ectomomyrmex) japonica Emery, 1902c: 31 (w.) JAPAN. Teranishi, 1940: 6 (m.). Combination in Ectomomyrmex: Santschi, 1925f: 82. Junior synonym of javana: Yasumatsu, 1962: 94.
 * cambodjana. Pachycondyla (Ectomomyrmex) astuta subsp. cambodjana Forel, 1911e: 253 (w.) CAMBODIA. Junior synonym of javana: Yasumatsu, 1962: 94.
 * horni. Pachycondyla (Ectomomyrmex) horni Forel, 1913f: 185 (w.q.) TAIWAN. Combination in Ectomomyrmex: Santschi, 1925f: 82. Junior synonym of javana: Yasumatsu, 1962: 94.
 * denticeps. Ectomomyrmex denticeps Wheeler, W.M. 1929g: 32, fig. 2 (w.) TAIWAN. Junior synonym of javana: Yasumatsu, 1962: 94.