Tetramorium cardiocarenum

Nothing is known about the biology of .

Identification
Xu and Zheng (1994) - The closest relative of T. cardiocarenum appears to be Tetramorium fergusoni, but the former with the anterior margin of clypeus convex, metanotal groove concave, petiole with ventral convex, dorsal surfaces of head and thorax with sparse blunt short hairs.

Distribution
Yunnan Province, China.

Distribution based on Regional Taxon Lists
Palaearctic Region: China.

Nomenclature

 *  cardiocarenum. Tetramorium cardiocarenum Xu & Zheng, 1994: 286, figs. 2, 9 (w.) CHINA.

Worker
Holotype, TL 2.7, HL 0.71, HW 0.63, CI 88, SL 0.50, SI 80, PW 0.13, AL 0.75, MDE 0.14.

Head cardioforrn, occipital margin strongly concave, in full face view the head narrowing anteriorly. Mandibles striate. The anterior margin of clypeus roundly convex. Frontal carinae short, end in front of the level of the eyes. Pronotal corners rounded in dorsal view. Metanotal groove conspicuous, concave in profile view. Propodeal spines long and acute, straight. Metapleural lobes small, rounded. Petiole with ventral convex; the node rectangular, the anterior and posterior faces parallel, the dorsal surface straight; in dorsal view the node broader than long. Median portion of clypeus and dorsum of head with numerous parallel and fine longitudinal rugae. Spaces between the rugae with fine punctulations. Scrobearea densely reticulate-rugulose, lateral surfaces of head puncto-striatus. Alitrunk and pedicel segments finely and densely reticulate-rugulose. Dorsum of alitrunk with fine longitudinal rugae. Gaster smooth and shining. Dorsal surface of head and body with sparse, short and blunt suberect hairs. Dorsal surface of the antennal scapes with very short curved subdecumbent hairs. Decumbent hairs are present on the dorsal surfaces of the hind tibiae. Body in color light yellowish brown; with the dorsal surfaces of head and alitrunk, and the gaster blackish yellowish brown.

Paratypes, TL 2.4-2.7, HL 0.70-0.75, HW 0.61-0.68, CI 88-91; SL 0.49-0.55, SI 76-84, PW 0.40-0.46, AL 0.70-0.79; MDE 0.14-0.15 (10 measured). As holotype but in some specimens hairs are completely absent from dorsal surfaces of head and alitrunk.

Type Material
Holotype: worker; Dali (25.45'N, 100.9'E), Yunnan Prov;, 2000m; 11-X-1991, No. A91-963 (Xu Zhenghui). Paratypes: 5 workers, with the same data as holotype; 5 workers, Anning Co., Yunnan Prov., 1820m, 19-VII-1991 (Xu Zhenghui); 5 workers, Mengla Co., Yunnan Prov., 650rn, 13-VII-1991 (Xu Zhenghui); 5 workers, Duyun, Guizhou Prov., 780m, 10-IX-1991 (Xu Zhenghui); 5 workers, Sanjiang Co., Guangxi Prov,, 350m, 18-VIII-1992 (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.
 * 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.