Tetramorium cyclolobium

Nothing is known about the biology of .

Identification
Xu and Zheng (1994) - The closest relative of T. cyclolobium is Tetramorium walshi, but in the former, the anterior face of the petiole node and the dorsum of the peduncle arc connected by an arched surface instead of a deep concave, the meta pleural lobes rounded apically.

Distribution
Guangxi Province, China.

Distribution based on Regional Taxon Lists
Palaearctic Region: China.

Nomenclature

 *  cyclolobium. Tetramorium cyclolobium Xu & Zheng, 1994: 287, figs. 4, 10 (w.) CHINA.

Worker
Holotype. TL 1.9, HL 0.56, HW 0.53, CI 93, SL 0.35, SI 67, PW 0.43, AL 0.58, MDE 0.14.

Mandibles weakly striate. Anterior margin of clypeus entire and straight, with a narrow flange. Frontal carinae: long and strong, extending back well beyond the eyes, and then curved down, forming the upper and posterior margins of the scrobes. Scrobes deeply depressed, with a fine longitudinal carina. Occipital margin evenly convex. Alitrunk in dorsal view short and broad, the pronotal corners angled. Propodeal spines short and acute, straight. Metapleural lobes broad, rounded apically. Petiole in profile view with the node anteroposteriorly compressed, the anterior face of the node and the dorsum of the peduncle are connected by an arched surface, in dorsal view the node transverse. Median portion of clypeus with several fine longitudinal rugae and a strong longitudinal carina. Head, alitrunk and pedicel segments densely reticulate-rugulose. Dorsum of head with conspicuous median longitudinal carina. Caster unsculptured, the first tergite with very fine basal striates. Dorsal surfaces of head and body uniformly clothed with a dense mat of pale trifid hairs, head also with a few elongate simple hairs which longer than the trifid ones. Lateral surfaces of alitrunk without hairs. Numerous short suberect hairs are present on the dorsal surfaces of scapes. Hind tibiae with dense trifid hairs on their dorsal surfaces. Body in colour yellowish brown, dorsum of head, and gaster blackish brown.

Paratypes. TL 1.9-2.1, HL 0.55·0.59, HW 0.53-0.56, CI 93-98, SL 0.34-0.38, SI 63-67, PW 0.40·0.44, AL 0.55-0.60, MDE 0.13-0.14 (8 measured). As hplotype, but in some specimens striates on mandibles arc conspicuous.

Type Material
Holotype: worker, Cuilin (25°l7’N, 110°6’E), Guangxi Prov. 260m, 16-VIII-1992. No. A92-301 (Xu Zhenghui). Paratypes: 4 workers, with the same data as holotype; 4 workers, Nanning, Cuangxi Prov., 210m, 3-IX-1991 (Xu Zhenghui).

The type specimens are deposited in the Insect Collection, Institute of Zoology, Shaanxi Normal University, Xi'an, China.

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.
 * Li Q., B. D. Hoffmann, Z. X. Lu, and Y. Q. Chen. 2017. Ants show that the conservation potential of afforestation efforts in Chinese valley-type savanna is dependent upon the afforestation method. Journal of Insect Conservation DOI 10.1007/s10841-017-0005-0
 * Li Qiao, Chen You-qing, Guo Xiao, Duan Yan, Chen Yan-lin, and Xu Zheng-hui. 2007. Diversity of ants in differents habitats in Yuanmou arid-hot valley, Yunnan. Journal of Fujian College of Forestry 27(3): 272-277.
 * Xu Z. and Zheng Z. 1994. New species and new record species of the genus Tetramorium Mayr (Hymenoptera: Formicidae) from southwestern China. Entomotaxonomia 16(4): 285-290.