Technomyrmex yamanei

Nothing is known about the biology of .

Identification
Bolton (2007) - A member of the T. modiglianii complex in the Technomyrmex albipes group. Closely related to Technomyrmex modiglianii but yamanei is easily separated by the distribution of setae on the head, the much deeper clypeal incision which is sharply angled where the inner margins of the incision meet the anterior clypeal margin, and by its extremely sparse, very short setae on the first gastral tergite.

Distribution based on Regional Taxon Lists
Oriental Region: Laos, Thailand, Vietnam.

Nomenclature

 *  yamanei. Technomyrmex yamanei Bolton, 2007a: 107, figs. 47, 67 (w.) THAILAND.

Worker
Holotype. TL 4.0, HL 1.08, HW 1.01, SL 0.87, PW 0.64, WL 1.16. Indices: CI 94, SI 86, OI 20, EPI 83, DTI 118.

Frontal carina with 2 setae: in profile the anterior at the torulus (the posterior at about the level of the anterior margin of the eye; without a seta at level of posterior margin of eye. Behind level of posterior margin of eye there is a single pair of dorsal setae, in profile located about half the distance to the posterior margin of the head. Posterior margin itself has two pairs of setae close to the midline and a much shorter seta on each side, closer to the corners, All these cephalic setae are shorter than the maximum diameter of the eye. With head in full-face view the anterior clypeal margin with a long, U-shaped median incision; inner margin of incision meets the anterior clypeal margin in an acute angle on each side. Posterior margin of head broadly and strongly emarginate. Eyes small and located in front of the midlength, the outer margins of the eyes are set well in from the outline of the sides in full-face view. With mesosoma in profile the mesonotal outline is evenly curved, without a distinct step or angle in the outline that defines conspicuous dorsal and declivitous faces. Propodeal dorsum short in profile and convex, the straight-line length of the dorsum less than the depth of the declivity to the spiracle; the dorsum rounds narrowly but bluntly into the declivity. Number of setal pairs on mesosoma: pronotum 4 - 5; mesonotum 1; propodeal dorsum 0; lateral margins of propodeal declivity 0. Gastral tergite 1 with very sparse, minute inconspicuous setae that are only about 0.30 x the maximum diameter of the eye. Setae on gastral tergites 2 - 3 more numerous and slightly longer. Setae on gastral tergite 4 conspicuous and twice as long as those on tergites 1 - 2, Head, mesosoma, petiole and gaster black; leg segments blackish brown to black except for the tarsi which are dull yellow.

Other worker. TL 3.4 - 3.9, HL 0.88 - 1.07, HW 0.83 - 1.02, SL 0.72 - 0.86, PW 0.50 - 0.63, WL l.00 - 1.20 (4 measured). Indices: CI 94 - 100, SI 84 - 87, OI 19 - 22, EPI 81 - 93, DTI 120 – 124. As holotype but one worker with a single short seta on the propodeal declivity. Colour varies from blackish brown to black.

Type Material
Holotype worker, Thailand: Doi Chiang Dao, nr Chiang Mal, 700-800 m. alt., 3.iv.2005 (Sk. Yamane). Paratypes. 2 workers with same data as holotype (KUIC, ).

References based on Global Ant Biodiversity Informatics

 * Bolton B. 2007. Taxonomy of the dolichoderine ant genus Technomyrmex Mayr (Hymenoptera: Formicidae) based on the worker caste. Contributions of the American Entomological Institute 35(1): 1-150.
 * Bolton, B. "Taxonomy of the dolichoderine ant genus Technomyrmex Mayr (Hymenoptera: Formicidae) based on the worker caste." Contributions of the American Entomological Institute 35, no. 1 (2007): 1-149.
 * Fontanilla A. M., A. Nakamura, Z. Xu, M. Cao, R. L. Kitching, Y. Tang, and C. J. Burwell. 2019. Taxonomic and functional ant diversity along tropical, subtropical, and subalpine elevational transects in southwest China. Insects 10, 128; doi:10.3390/insects10050128
 * Jaitrong W., B. Guenard, E. P. Economo, N. Buddhakala, and S. Yamane. 2016. A checklist of known ant species of Laos (Hymenoptera: Formicidae). Asian Myrmecology 8: 1-32. DOI: 10.20362/am.008019
 * Zryanin V. A. 2011. An eco-faunistic review of ants (Hymenoptera: Formicidae). In: Structure and functions of soil communities of a monsoon tropical forest (Cat Tien National Park, southern Vietnam) / A.V. Tiunov (Editor). – M.: KMK Scientific Press. 2011. 277 р.101-124.