Key features of small shiny Monomorium species from Japan. A, B. Apical flageromeres of worker antenna, showing relative length of flagellomere 8 (antennomere 10): A. Monomorium hiten; B. M. floricola, f8: flagellomere 8. C–E. Pilosity on propodeum and waist (worker): C. Monomorium floricola; D. M. hiten; E. M. triviale. Abbreviations: prp: propodeum, pt: petiole, ppt: postpetiole; F, G. Sculpture on frontal lobe (worker): F. Monomorium chinense; G. M. floricola. Abbreviations: as: antennal socket, sc: antennal scape, cl: clypeus, frl: frontal lobe; H–J. Median disc of clypeus (worker), showing condition of ita anterolateral corner (arrow): H. Monomorium brachypterum sp. nov.; I. M. floricola; J. M. chinense; K, L. Pilosity on antennal scape (worker): K. Monomorium floricola; L. M. intrudens.

 
 
  Part of: Idogawa N, Dobata S, Okada Y, Yamane S (2025) A new species of Monomorium Mayr, 1855 (Hymenoptera, Formicidae) with a brachypterous queen from southern Japan, and phylogeny of Japanese Monomorium species with diverse reproductive strategies. ZooKeys 1250: 49-78. https://doi.org/10.3897/zookeys.1250.150776