Monomorium triviale

This species is found in open land and at woodland margins, and is quite rare in Japan (Japanese Ant Image Database). Idogawa and Dobata (2018) found colonies nesting in bamboo cavities in Kyoto Prefecture, Japan in a thicket dominated by deciduous broad-leaved trees.

Identification
Apart from coloration, this species is similar to Monomorium intrudens. In Japan, the general appearance of M. triviale (coloration, size, sculpturing) is also similar to Solenopsis japonica, although M. triviale has a 3- rather than 2-segmented antennal club.

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

Nomenclature

 * . Monomorium triviale Wheeler, W.M. 1906c: 311 (w.) JAPAN.
 * Type-material: 7 syntype workers.
 * Type-locality: Japan: Kanagawa (H. Sauter).
 * Type-depository: MCZC (perhaps also in DEIB).
 * Status as species: Emery, 1908h: 683; Yano, 1910: 419; Emery, 1922e: 173; Azuma, 1950: 35; Azuma, 1951: 87; Chapman & Capco, 1951: 165; Azuma, 1953: 2; Ettershank, 1966: 92; Azuma, 1977: 114; Onoyama, 1980: 198; Ogata, 1991b: 107; Morisita, et al. 1992: 40; Bolton, 1995b: 268; Imai, et al. 2003: 133; Guénard & Dunn, 2012: 46.
 * Distribution: China, Japan, Korea.

References based on Global Ant Biodiversity Informatics

 * Azuma M. 1977. On the myrmecological-fauna of Mt. Rokko, Hyogo, with description of a new species (Formicidae, Hymenoptera). Hyogo Biology 7:112-118.
 * 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. 1987. Taxonomic study on ants (Formicidae) in Korea (1). On the genus Monomorium. Journal of the Institute of Science Education (Cheongju National Teachers' College) 11:17-30.
 * Choi B.M. 1996. Distribution of ants (Formicidae) in Korea (16) - Ant fauna from Chollabukdo. Korean J. Soil. Zoology 1(1): 5-23.
 * Choi B.M. 1996. Distribution of ants (Formicidae) in Korea (16): Ant fauna from Chollabukdo. Korean Journal of Soil Zoology 1(1): 5-23.
 * Choi B.M. and C.H. Kim, 1987, Studies on the distribution of ants (Formicidae) in Korea (4). Ant fauna in Is. Hongdo and Is. Taehukusando. Journal of Chongju National Teacher College 24: 357-370.
 * 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.
 * Emery, C. "Beiträge zur Monographie der Formiciden des paläarktischen Faunengebietes. (Hym.) Teil V. Monomorium." Deutsche Entomologische Zeitschrift 1908 (1908): 663-686.
 * Guénard B., and R. R. Dunn. 2012. A checklist of the ants of China. Zootaxa 3558: 1-77.
 * Ha S.J, S.J. Park, and B.J. Kim. 2002. Comparative ant faunas between Seonyudo and seven other islands of West Sea in Korea. Korean Journal of Entomology 32(2): 75-79.
 * Huang Jian-hua, Zhou Shan-yi. 2007. A checklist of family Formicidae of China - Myrmicinae (Part II) (Insecta: Hymenoptera). Journal of Guangxi Normal University : Natural Science Edition 25(1): 91-99.
 * Kim B.J. 1996. Synonymic list and distribution of Formicidae (Hymenoptera) in Korea. Entomological Research Bulletin Supplement 169-196.
 * Kubota. S., and M. Terayama. 1988. Ant fauna of Tokyo. (1) A list of ants collected at the parks. ARI Reports of the Myrmecologists Society (Japan) 16: 14-16
 * Miyama D., S. Yamane, T. Hishida, T. Kyono, T. Saito, T. Kuwahara, and N. Inoue. 2007. Ant Fauna in a Coppice Area around Shishitsuka-Ohike in Tsuchiura, Central Japan (Hymenoptera, Formicidae). Bulletin of Ibaraki Nature Museum 10: 1-10.
 * Ogata. K., Touyama, Y. and Choi, B. M. 1994. Ant fauna of Hiroshima Prefecture, Japan. ARI Reports of the Myrmecologists Society (Japan) 18: 18-25
 * Sato T., N. Tsurusaki, K. Hamaguchi, and K. Kinomura. 2010. Ant fauna of Tottori prefecture, Honshu, Japan. Bulletin of the Tottori Prefectural Museum 47: 27-44.
 * So, Ha, Seong, Jin, Park, Joon and Byung, and Kim, Jin. 2002. Comparitive Ant Faunas between Seonyudo and Seven other Islands of West Sea in Korea. Korean Journal of Entomology. 32:75-79.
 * Tanaka B., N. Kanie, T. Mano, R. Arita, and A. Shiragane. 1999. The insect fauna between Takabashi bridge and Nomi-kouen Park, margins of the Yahagigawa river. ????? 3: 35-79.
 * 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. 2001. Ants of the Institute for Nature study in Minato-ku, Tokyo: species composition, relative nest abundance, and nest density. Rept. Inst. Nat. Stu. 33: 289-300.
 * 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.
 * Teruyama. M. 1988. Ant fauna of Saitama Prefecture, Japan. ARI Reports of the Myrmecologists Society (Japan) 16: 4-13