Euponera pilosior

A rarely collected species that is known from leaf litter samples.

Identification
Total body length of workers about 4.5 - 5 mm. Color dark reddish brown to blackish brown; antennae, mandibles and legs reddish brown. Head almost square in frontal view, slightly longer than wide. Mandibles each with a basal pit. Eyes small, each with about 10 facets. Subpetiolar process trapezoidal, with sub-angulate antero-ventral and posteroventral corners.

Distribution based on Regional Taxon Lists
Palaearctic Region: China, Democratic Peoples Republic of Korea, Japan, Republic of Korea.

Japan (Honshu, Shikoku, Kyushu, Tsushima I., Nansei Is (Okinawa I. and northwards)); Korean Peninsula.

Nomenclature

 *  pilosior. Euponera (Trachymesopus) sharpi subsp. pilosior Wheeler, W.M. 1928d: 98 (w.) JAPAN. Ogata, 1987: 114 (q.m.). Combination in Trachymesopus: Brown, 1963: 8; in Pachycondyla: Brown, in Bolton, 1995b: 308; in Euponera: Schmidt & Shattuck, 2014: 87. Raised to species: Brown, 1963: 8. Senior synonym of chosonensis: Brown, 1963: 8.
 * chosonensis. Euponera (Trachymesopus) chosonensis Teranishi, 1940: 8 (w.) KOREA. Junior synonym of pilosior: Brown, 1963: 8.

References based on Global Ant Biodiversity Informatics

 * Abe T. 1977. A preliminary study on the ant fauna of the Tokara Islands and Amami-Oshima. Ecol. Stud. Nat. Cons. Ryukyu Isl. 3: 93-102.
 * Azuma, S. and M. Kinjo. 1987. Family Formicidae, In Checklist of the insects of Okinawa. The Biological Society of Okinawa, Nishihara. Pages 310-312.
 * Chapman, J. W., and Capco, S. R. 1951. Check list of the ants (Hymenoptera: Formicidae) of Asia. Monogr. Inst. Sci. Technol. Manila 1: 1-327
 * Choi B.M., K. Ogata, and M. Terayama. 1993. Comparative studies of ant faunas of Korea and Japan. 1. Faunal comparison  among islands of Southern Korean and northern Kyushu, Japan. Bull. Biogeogr. Soc. Japan 48(1): 37-49.
 * Choi B.M., Kim, C.H., Bang, J.R. 1993. Studies on the distribution of ants (Formicidae) in Korea (13). A checklist of ants from each province (Do), with taxonomic notes. Cheongju Sabom Taehakkyo Nonmunjip (Journal of Cheongju National University of Education) 30: 331-380.
 * Collingwood C. A. 1976. Ants (Hymenoptera: Formicidae) from North Korea. Annales Historico-Naturales Musei Nationalis Hungarici 68:
 * Fontanilla A. M., A. Nakamura, Z. Xu, M. Cao, R. L. Kitching, Y. Tang, and C. J. Burwell. 2019. Taxonomic and functional ant diversity along tropical, subtropical, and subalpine elevational transects in southwest China. Insects 10, 128; doi:10.3390/insects10050128
 * Fukumoto S., Jaitrong W. and Yamane S.K. 2013. Ant Fauna of Kuro-shima, Iwo-jima and Take-shima islands, Kagoshima Prefecture, southwestern Japan. Nature of Kagoshima 39: 119-125
 * Fukumoto S., R. Satria, T. Maeda, and S. Yamane. 2014. Ant fauna of Gaja-jima, Tokara Islands, southwestern Japan. Nature of Kagoshima 40: 127131.
 * Fukumoto S., W. Jaitrong, and S. Yamane. 2013. Ant fauna of Take-shima, Iwo-jima and Kuro-shima islands, Kagoshima Prefecture, southwestern Japan. Nature of Kagoshima 39: 99-105.
 * Guo X., Q. Lin, J. Cui, D. Gao, S. Xu, and Z. Sheng. 2014. Biodiversity and spatial distribution patterns of ant species in tea gardens of Chongqing. Chinese Journal of Eco-Agriculture DOI: 10.3724/SP.J.1011.2014.31052
 * Guénard B., and R. R. Dunn. 2012. A checklist of the ants of China. Zootaxa 3558: 1-77.
 * Harada Y., H. Yadori, M. Yoneda, R. Takinami, K. Nagahama, Y. Matsumoto, A. Oyama, S. Maeda, and S. Yamane. 2009. Ant fauna of Tanegashima (Hymenoptera, Formicidae). Nankiseibutu, the Nanki Biological Society 51(1): 15-21.
 * Harada Y., K. Nishikubo, K. Matsumoto, M. Matsuda, Y. Inazawa, Y. Ozono, S. Koto, N. Kawaguchi, and S. Yamane. 2011. Ant fauna of Japanese beech (Fagus crenata) forests in southwestern Japan. Bull. Biogeogr. Soc. Japan 66: 115-127.
 * Harada Y., K. Tashiro, K. Ebihara, H. Yadori, M. Yoneda, R. Takinami, K. Nagahama, and K. Hayashi. 2008. Ant fauna of the lavas of Sakurajima Volcano, Southern Japan. Bull. Biogeogr. Soc. Japan 63: 205-215.
 * Harada Y., M. Enomoto, K. Nishimuta, and H. Mizumata. 2015. Ants of the Amami Islands, central Ryukyus, Japan. Nature of Kagoshima 41: 199–208.
 * Harada Y., M. Enomoto, N. Nishimata, and K. Nishimuta. 2014. Ants of the Tokara Islands, northern Ryukyus, Japan. Nature of Kagoshima 40: 111121.
 * Harada Y., Y. Matsumoto, S. Maeda, A. Oyama, and S. Yamane. 2009. Comparison of ant fauna among different habitats of Yaku-shima Island, southern Japan. Bull. Biogeogr. Soc. Japan 64: 125-134.
 * Hosoichi S., M. Yoshimura, Y. Kuboki, and K. Ogata. 2007. Ants from Yakushima Island, Kagoshima Prefecture. Ari 30: 47-54.
 * Hosoichi S., W. Tasen, S. H. Park. A. Le Ngoc, Y. Kuboki, and K. Ogata. 2015. Annual fire resilience of ground-dwelling ant communities in Hiraodai Karst Plateau grassland in Japan. Entomological Science 18: 254–261.
 * Hosoishi S., M. Yoshimura, Y. Kuboki, and K. Ogata. 2007. Ants from Yakushima Island, Kagoshima Prefecture. Ari 30: 47-54.
 * Iwata, Kouki, Eguchi, Katsuyuki and Yamane, Seiki. 2005. A Case Study on Urban Ant Fauna of Southern Kyusyu, Japan, with Notes on a New Monitoring Protocol (Insecta, Hymenoptera, Formicidae). Asia-Pacific Entomol. 8(3):263-272.
 * Kim B.J. 1996. Synonymic list and distribution of Formicidae (Hymenoptera) in Korea. Entomological Research Bulletin Supplement 169-196.
 * Kim B.J.; Kim, J.H.; Kim K 1998. Systematic study of Ponerinae (Hymenoptera: Formicidae) from Korea. Korean Journal of Entomology 28:145-154.
 * Kim B.J.; Kim, K.G.; Lim, K.H. 1993. Systematic study of ants from Chejudo province. Korean Journal of Entomology 23: 117-20
 * Kim et al. 1993. Systematic study of ants from Chejudo Province. Koran Journal of Entomology 23(3): 117-141.
 * Kobayashi S., R. Sakai, H. Kaji, S. Kizu, S. Tateishi, and H. Takasaki. 2014. Subterranean ant Pyramica hexamera (Hymenoptera, Formicidae) recorded from Okayama Prefecture: first specimens collected in Okayama City. Naturalistae 18: 39-42.
 * Leong C. M., S. F. Shiao, and B. Guenard. 2017. Ants in the city, a preliminary checklist of Formicidae (Hymenoptera) in Macau, one of the most heavily urbanized regions of the world. Asian Myrmecology 9: e009014.
 * Lyu D. 2008. Taxonomic study on the Poneromorph subfamilies group (Hymenoptera: Formicidae) in Korea. Korean J. Appl. Entomol. 47(4): 315-331.
 * Matsumura S. and Yamane Sk. 2012. Species composition and dominant species of ants in Jigenji Park, Kagoshima City, Japan. Nature of Kagoshima 38: 99107
 * Matsumura S., and S. Yamane. 2012. Species composition and dominant species of ants in Jigenji Park, Kagoshima City, Japan. Nature of Kagoshima 38: 99-107.
 * Natuhara Y. 1998. Ant faunae in Osaka City and three other sites in Osake Prefecture. Bulletin of Myrmecological Society of Japan 22: 1-5.
 * Onoyama K. 1976. A premilinary study on the ant fauna of Okinawa-ken, with taxonomic notes (Japan; Hymenoptera: Formicidae). Ecol. Stud. Nat. Cons. Ryukyu Isl. II: 121-141.
 * Paik W.H. 1984. A checklist of Formicidae (Hymenoptera) of Korea. Korean J. Plant Prot. 23(3): 193-195.
 * Park S.J., and B.J. Kim. 2002. Faunal comparison of ants among Cheongsando and other islands of South Sea in Korea. Korean Journal of Entomology 32(1): 7-12.
 * Park, Seong, Joon and Byung, and Kim, Jin. 2002. Faunal Comparison of Ants among Cheongsando and Other Islands of South Sea in Korea. Korean Jornal of Entomology. 32(1):7-12.
 * Shimana Y., and S. Yamane. 2009. Geogrpahical distribution of Technomyrmex brunneus Forel (Hymenoptera, Formicidae) in the western part of the mainland of Kagoshima, South Kyushu, Japan. Ari 32: 9-19.
 * Shimazaki, A. and Miyashita, T. 2005. Variable dependence on detrital and grazing food webs by generalist predators: aerial insects and web spiders. Ecography 28: 485-495.
 * Song Y., Z. Xu, C. Li, N. Zhang, L. Zhang, H. Jiang, and F. Mo. 2013. An Analysis on the Ant Fauna of the Nangun river Nature Reserve in Yunnan, China. Forest Research 26(6): 773-780.
 * Terayama M. 1981. Distribution of ants of the Nansei Archipelago. (I) Ants in the Amami Islands. Nature and Insects 16(8): 34-36.
 * Terayama M. 1992. Structure of ant communities in East Asia. A. Regional differences and species richness. Bulletin of the Bio-geographical Society of Japan 47: 1-31.
 * Terayama M. 2005. Ants from the Akasaka Imperial Gardens, Tokyo. Mem. Natn. Sci. Mus., Tokyo 39: 239-243.
 * Terayama M. and E. Hasegawa. 1991. Ant fauna of the Ogasawara islands. OgasawaraKenkyuNenpo 15: 4051.
 * Terayama M., K. Ogata, and B.M. Choi. 1994. Distribution records of ants in 47 prefectures of Japan. Ari (report of the Myrmecologists Society of Japan) 18: 5-17.
 * Terayama M., M. Kubota, H. Karube, and K. Matsumoto. 2011. Formicidae (Insecta: Hymenoptera) from the island of Minami-iwo-to, the Volcano Islands, with descriptions of two new species. Bull. Kanagawa prefect. Mus. (Nat. Sci.) 40: 75-80.
 * Terayama M., S. Kubota, and K. Eguchi. 2014. Encyclopedia of Japanese ants. Asakura Shoten: Tokyo, 278 pp.
 * Terayama M., and S. Kubota. 2002. Ants of Tokyo, Japan. ARI 26: 1-32.
 * Terayama. M. 2004. Geological and ecological distribution of Japanese ants communities. (translated from Japanese) Reports of the Saitama Prefecture Animal Research Association. 48:26
 * Wheeler W. M. 1928. Ants collected by Professor F. Silvestri in Japan and Korea. Bollettino del Laboratorio di Zoologia Generale e Agraria della Reale Scuola Superiore d'Agricoltura. Portici 22: 96-125.
 * Yamane S. 2016. How many species of Ants in Amami Islands? (in Japanese). Part 2, chapter 1 in How many species of Ants in Amami Islands? Pp. 92-132.
 * Yamane S., S. Ikudome, and M. Terayama. 1999. Identification guide to the Aculeata of the Nansei Islands, Japan. Sapporo: Hokkaido University Press, xii + 831 pp. pp, 138-317.
 * Yamane S., Y. Harada and M. Yano. 1985. Ant fauna of Tanega-shima Island, the northern Ryukyus (Hymenoptera, Formicidae). Mem. Kagoshima Univ. Res. Center S. Pac. 6(1): 166-173.
 * Yamane S., Y. Harada, and K. Eguchi. 2013. Classification and ecology of ants. Natural history of ants in Southern Kyushu. 200 pages
 * Yamane S.; Ikudome, S.; Terayama, M. 1999. Identification guide to the Aculeata of the Nansei Islands, Japan. Sapporo: Hokkaido University Press, xii + 831 pp. pp138-317.
 * Yamane, S.; Iwai, T.; Watanabe, H.; Yamanouchi, Y. 1994. Ant fauna of the Tokara Islands, northern Ryukyus, Japan (Hymenoptera, Formicidae). WWF (Worldwide Fund for Nature) Japan Science Report 2(2):311-327.
 * Yang Jun, Xu Zheng-hui, Mei Xiang-xin, Zhang Ji-ling, Zhao Yu-xiang. 2004. Taxonomy of Ants on the Eastern Slope of Xishan Mountains in Kunming. Journal of Southwest Forestry College 24(4): 26-37.
 * Zhang R., X. Zhou, Q. Tang, and S. Zhou. 2016. Morphometrics of thirteen species of the genus Pachycondyla (Hymenoptera: Formicidae) in China. Chinese Journal of Applied Entomology 53(5): 1130-1137.