Chronoxenus wroughtonii

Distribution based on Regional Taxon Lists
Indo-Australian Region: Singapore. Oriental Region: India, Sri Lanka. Palaearctic Region: China, Republic of Korea.

Nomenclature

 *  wroughtonii. Bothriomyrmex wroughtonii Forel, 1895e: 470 (w.q.m.) INDIA. See also: Bingham, 1903: 307. Combination in Chronoxenus: Heterick & Shattuck, 2011: 166. Current subspecies: nominal plus formosensis, javanus, victoriae.

Description
Worker

Bingham (1903): Head and thorax brownish yellow; abdomen brown, sometimes with a yellowish tint, the whole insect covered with a fairly abundant pale pubescence, especially dense on the abdomen. Head without the mandibles square, as broad posteriorly as in front, very convex; mandibles comparatively broad, the masticatory margin oblique, armed with 4 blunt teeth; clypeus convex, broad, subtriangular, anteriorly lightly arched; antennae thick and rather long, the scape extending beyond the top of the head; the 2nd joint of the flagellum longer than broad. Thorax short and broad, thoracic sutures well-marked ; the pro-, meso- and meta- notum convex, the latter apically truncate and sloping; legs robust. Node of the pedicel comparatively erect and high ; abdomen broadly oval.

Length: 2.3 - 2.8 mm

Queen

Bingham (1903): Resembles the worker, but is dark brown; the mandibles, articulation of the joints of the legs, and the tarsi yellow; the antennae very pale whitish yellow. Head square, posteriorly slightly emarginate ; the mandibles and clypeus as in the worker, the antennae proportionately more slender and filiform, the basal two joints of the flagellum of the antenna; elongate. Thorax some- what flat above; the wings hyaline, nervures pale yellow ; the node of the pedicel and the abdomen as in B. myops.

Length: 3.5 mm

Male

Bingham (1903): Resembles the queen in colour. Head orbicular; eyes and ocelli very large; mandibles narrow and pointed; clypeus very convex, transverse ; antennae filiform, the 2nd joint of the flagellum elongate, longer than the 1st or 3rd. Thorax very massive; the mesonotum somewhat flat ; the scutellum slightly convex, elevated above the basal portion of the metanotum, which is horizontal and shorter than the apical truncate portion.

Length: 2 - 2.5 mm

References based on Global Ant Biodiversity Informatics

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 * Dias R. K. S. 2002. Current knowledge on ants of Sri Lanka. ANeT Newsletter 4: 17- 21.
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 * Rajan P. D., M. Zacharias, and T. M. Mustak Ali. 2006. Insecta: Hymenoptera: Formicidae. Fauna of Biligiri Rangaswamy Temple Wildlife Sanctuary (Karnataka). Conservation Area Series, Zool. Surv. India.i-iv,27: 153-188.
 * Shattuck S. O. 1994. Taxonomic catalog of the ant subfamilies Aneuretinae and Dolichoderinae (Hymenoptera: Formicidae). University of California Publications in Entomology 112: i-xix, 1-241.
 * Song Y., Z. Xu, C. Li, N. Zhang, L. Zhang, H. Jiang, and F. Mo. 2013. An Analysis on the Ant Fauna of the Nangun river Nature Reserve in Yunnan, China. Forest Research 26(6): 773-780.
 * Tang J., Li S., Huang E., Zhang B. and Chen Y.. 1995. Hymenoptera: Formicidae (1). Economic Insect Fauna of China 47: 1-133.
 * Xu Z., Zeng G., Liu T.-Y. and He Y.-F.. 1999. [A study on communities of Formicidae ants in different subtypes of vegetation in Xishuangbanna District of China.] Zoological Research 20: 118-125
 * Yamane S. 2013. A Review of the ant fauna of the Krakatau Islands, Indonesia. Bull. Kitakyushu Mus. Nat. Hist. Hum. Hist. Ser: A, 11: 1-66