Camponotus monju

Identification
Terayama (1999) - Total length of workers around 7-11 mm. Head and gaster dark brown to blackish brown; mesosoma, petiole and legs brown to dark brown. Head slender; antennal scape long. Head and gaster with abundant erect or suberect hairs; dorsa of pronotum and mesonotum with 6-14 and 2-6 erect hairs, respectively; propodeal dorsum with more than 6 erect hairs; anterior surface of forecoxa with 4-6 erect hairs.

This species resembles Camponotus devestivus from Japan, Camponotus pseudoirritans from southern China, and Camponotus mitis from southern China, Sri Lanka, and India. However, it is distinguished from Camponotus devestivus by the much more abundant erect hairs on the head and dorsum of pro- and mesonotum, and from Camponotus pseudoirritans and Camponotus mitis by the rectangular head in major workers.

Distribution based on Regional Taxon Lists
Palaearctic Region: Japan.

Nomenclature

 * . Camponotus (Tanaemyrmex) monju Terayama, 1999b: 36, figs. 21-23 (s.w.) JAPAN.
 * Status as species: Imai, et al. 2003: 38; Lin & Wu, 2003: 61; Terayama, 2009: 216; Ran & Zhou, 2011: 69.

Worker
Holotype (Minor). HL 2.30 mm; HW 1.30 mm; 8L 3.35 mm; C1 177; 81 258; WL 3.80 mm; PW 1.20 mm; P8L 0.40 mm; PH 0.76 mm; DPW 0.48 mm; TL 8.8 mm. Head slender, 1.8 times as long as wide, widest at anterior end of head capsule in full face view; side of head behind eye convergent posteriorly. Mandible with 6 teeth. Clypeus with a median longitudinal carina; median projection of anterior clypeal margin rectangular, with straight anterior margin. Antenna remarkably long, scape 1.5 times head length and exceeding posterior margin of head by 3/5 its length; 2nd segment 4.5 times as long as wide; 3rd segment 4.7 times as long as wide. Eye moderately convex, 0.54 mm in maximum diameter. Mesosoma slender, with weakly convex pro- and mesonotal dorsum and almost straight propodeal dorsum in profile; posterodorsal margin of propodeum bluntly angulate. Petiole row and relatively thick, with weakly convex anterior and posterior margins; dorsal margin of scale in frontal view convex. Head and gaster with abundant erect or suberect hairs; dorsum of pronotum with 6, mesonotum with 4, and propodeum with 8 erect hairs; anterior surface of forecoxa with 5 long erect hairs and several short hairs. Head and gaster dark brown to blackish brown; mesosoma, petiole and legs brown. Major worker. HL 3.30 mm; HW 2.53 mm; SL 3.00 mm; CI 130; Sl 119; WL 4.10 mm; PW 1.70 mm; PSL 0.50 mm; PH 1.10 mm DPW 0.65 mm; TL 11.0 mm (A paratype from the same nest as holotype measured). Head long, with subparallel sides and even convex posterior margin in full face view. Mandible with 6 teeth. Antenna long; scape 0.9 times head length, exceeding posterior margin of head by 1/3 its length Mesosoma with convex dorsal margin. Petiolar node thick and row, with weakly convex anterior and posterior margins in profile; dorsum carinate; dorsal margin in frontal view strongly convex. Head with abundant suberect hairs; dorsa of pronotum and mesosotum each with more than 10 long erect hairs; dorsum of propodeum with several long erect hairs; gaster with abundant long erect or sub-erect hairs. Color as in minor worker.

Type Material
Holotype. Worker, Yonaha-dake, Okinawa-jima, Okinawa Pref., 25. VIII. 1991, M. Terayama leg. . Paratypes. 9 workers, 1 queen, same data as holotype; 6 workers, 1 queen, Kunigami-son, Okinawa-jima, Okinawa Pref., 21. VIII. 1991, M. Terayama leg.; 5 workers, Amami-oshima, Kagoshima Pref., 31. VIII. 1982, M. Terayama leg.; 16 workers, Omoto-dake, Ishigaki-jima, Okinawa Pref., 16. III. 1984, M. Terayama leg.; 2 workers, Banna-dake, Ishigaki-jima, Okinawa Pref., 30. IV. 1985, M. Nishimura leg.; 2 workers, Iriomote-jima, Okinawa Pref., 25. VII. 1985, M. Nishimura leg.

References based on Global Ant Biodiversity Informatics

 * Guénard B., and R. R. Dunn. 2012. A checklist of the ants of China. Zootaxa 3558: 1-77.
 * Lee T. L., and Y. S. Wei. 2005.. Study for the temporal and spatial variation of the ant assemblages as the biological indicator in national parks. Journal of Animal and Veterinary Advances 4(4): 491-496.
 * Ran H., and S. Y. Zhou. 2011. Checklist of Chinese Ants: the Formicomorph Subfamilies (Hymenoptera: Formicidae) (I). Journal of Guangxi Normal University: Natural Science Edition. 29(3): 65-73.
 * Terayama M. 2009. A synopsis of the family Formicidae of Taiwan (Insecta: Hymenoptera). Research Bulletin of Kanto Gakuen University. Liberal Arts 17:81-266.
 * Terayama M., S. Kubota, and K. Eguchi. 2014. Encyclopedia of Japanese ants. Asakura Shoten: Tokyo, 278 pp.
 * Terayama Mamoru. 2009. A synopsis of the family Formicidae of Taiwan (Insecta, Hymenoptera). The Research Bulletin of Kanto Gakuen University 17: 81-266.
 * Terayama, M. 1999. The ant genus Camponotus Mayr (Hymenoptera: Formicidae) in Japan. Memoirs of the Myrmecological Society of Japan 1:25-48.
 * Terayama, M. 2009. A synopsis of the family Formicidae of Taiwan (Insecta; Hymenoptera). The Research Bulletin of Kanto Gakuen University 17: 81-266.
 * 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. Fukumoto, Y. Maeda, and Y. Sato. 2017. Records of ants from Kakeroma-jima, the Amami Islands, Japan. Bull. Biogeogr. Soc. Japan 71, 131-137.
 * 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.; Ikudome, S.; Terayama, M. 1999. Identification guide to the Aculeata of the Nansei Islands, Japan. Sapporo: Hokkaido University Press, xii + 831 pp. pp138-317.