Crematogaster treubi

Nothing is known about the biology of .

Identification
A member of the Crematogaster irritabilis group. Hosoishi and Ogata (2012) - This species is similar to C. kojimai, but can be distinguished by the long and slender propodeal spines.

Slight morphological variations are found not only in the specimens collected from different localities, but also within nest series collections. Some specimens collected in Bali have shorter propodeal spines in contrast to the usual long and slender spines. The mesopleuron is relatively smooth and shining in most specimens, but especially shining in Sepilok specimens or somewhat shagreened in Pulau Sebeku specimens. These variants are treated as intraspecific variation within C. treubi until molecular data are available.

Distribution based on Regional Taxon Lists
Indo-Australian Region: Brunei Darussalam, Indonesia, Malaysia. Oriental Region: Cambodia, Laos, Myanmar, Thailand. Palaearctic Region: China.

Nomenclature

 *  treubi. Crematogaster treubi Emery, 1896f: 246 (w.) INDONESIA (Java). Combination in C. (Orthocrema): Emery, 1922e: 132; in C. (Mesocrema): Santschi, 1937e: 310. Senior synonym of sic: Emery, 1922e: 132; of millardi, vastatrix: Hosoishi & Ogata, 2012: 25. Current subspecies: nominal plus apilis.
 * sic. Crematogaster buddhae r. sic Forel, 1907a: 24 (w.) WEST MALAYSIA. Junior synonym of treubi: Emery, 1922e: 132.
 * millardi. Crematogaster millardi Forel, 1902c: 205 (w.) MYANMAR. Viehmeyer, 1916a: 125 (q.). Combination in C. (Orthocrema): Emery, 1922e: 132; in C. (Mesocrema): Santschi, 1928b: 33. Junior synonym of treubi: Hosoishi & Ogata, 2012: 25.
 * vastatrix. Crematogaster treubi var. vastatrix Forel, 1911a: 24 (w.q.) INDONESIA (Java). Combination in C. (Orthocrema): Emery, 1922e: 132. Junior synonym of treubi: Hosoishi & Ogata, 2012: 25.

Worker
Hosoishi and Ogata (2012) - HW 0.51-0.74; HL 0.52-0.71; CI 94-104; SL 0.34-0.51; SI 65-74; EL 0.1-0.15; PW 0.28-0.44; WL 0.57-0.81; PSL 0.04-0.1; PtL 0.15-0.22; PtW 0.16-0.22; PtH 0.1-0.14; PpL 0.1-0.15; PpW 0.15-0.19; PtHI 55-78; PtWI 91-111; PpWI 113-150; WI 81-100 (Seventeen workers measured).

Workers monomorphic.

Compound eyes not projecting from lateral margin of head, the outer margin of eye almost flush with head capsule in full face view. Scape not reaching posterior corner of head, the scape with standing setae.

Anterior margin of pronotal collar almost straight or slightly concave in dorsal view. Metanotal groove shallow. Propodeal spines long and slender, their length longer than the diameter of propodeal spiracles. Anterior margin of metapleural gland bulla reaching or exceeding anterior margin of propodeal spiracle. Petiole in dorsal view broader anteriorly than posteriorly. Postpetiole weakly bilobed, without distinct longitudinal median sulcus. Subpetiolar and subpostpetiolar processes undeveloped.

Clypeus relatively smooth and shining, but with feeble rugulae. Dorsal face of mesosoma almost smooth and shining. Dorsolateral face of pronotum smooth in dorsal view. Lateral surface of pronotum smooth and shining. Lateral surface of mesonotum with rugulae. Mesopleuron relatively smooth and shining, but the anterodorsal and lower portions weakly sculptured. Longitudinal rugulae developed anteriorly and posteriorly of the metanotal groove in lateral view.

Dorsal face of head, clypeus and mesosoma with abundant standing setae. Fourth abdominal tergite with sparse standing setae.

Type Material
Hosoishi and Ogata (2012) - LECTOTYPE worker ( worker) (by present designation) and two paralectotype workers from INDONESIA: Java (M. Massart) [examined].

Crematogaster treubi type material

Lectotype designated by Hosoishi & Ogata, 2012: 25.

Crematogaster millardi type material

Lectotype designated by Hosoishi & Ogata, 2012: 25.

Crematogaster treubi vastatrix type material

Lectotype designated by Hosoishi & Ogata, 2012: 25.

References based on Global Ant Biodiversity Informatics

 * Chapman, J. W., and Capco, S. R. 1951. Check list of the ants (Hymenoptera: Formicidae) of Asia. Monogr. Inst. Sci. Technol. Manila 1: 1-327
 * Dias R. K. S. 2002. Current knowledge on ants of Sri Lanka. ANeT Newsletter 4: 17- 21.
 * Emery C. 1901. Formiciden von Celebes. Zoologische Jahrbücher. Abteilung für Systematik, Geographie und Biologie der Tiere 14:565-580.
 * Emery, C.. "Formiche raccolte da Elio Modigliani in Sumatra, Engano e Mentawei." Annali del Museo Civico di Storia Naturale Giacomo Doria (Genova) (2) 20, no. 40 (1900): 661-722.
 * Emery, C.. "Formicides recoltes a Buitenzorg (Java), par M. Massart." Annales de la Société Entomologique de Belgique 40 (1896): 245-249.
 * 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
 * Forel A. 1902. Myrmicinae nouveaux de l'Inde et de Ceylan. Rev. Suisse Zool. 10: 165-249.
 * Forel A. 1903. Les Formicides de l'Empire des Indes et de Ceylan. Part X. J. Bombay Nat. Hist. Soc. 14: 679-715.
 * Forel A. 1911. Fourmis de Bornéo, Singapore, Ceylan, etc. récoltées par MM. Haviland, Green, Winkler, Will, Hose, Roepke et Waldo. Rev. Suisse Zool. 19: 23-62.
 * Forel A. 1912. Einige neue und interessante Ameisenformen aus Sumatra etc. Zool. Jahrb. Suppl. 15: 51-78.
 * Gay H., and R. Hensen. 1992. Ant specificity and behaviour in mutualisms with epiphytes: the case of Lecanopteris (Polypodiaceae). Biological Journal of the Linnean Society 47: 261-284.
 * Guénard B., and R. R. Dunn. 2012. A checklist of the ants of China. Zootaxa 3558: 1-77.
 * Hosoishi S. and K. Ogata. 2009. A check list of the ant genus Crematogaster in Asia (Hymenoptera: Formicidae). Bull. Inst. Trop. Agr. Kyushu Univ. 32: 43-83.
 * Hosoishi S., K. Ogata. 2012. Revision of the Crematogaster brevis complex in Asia (Hymenoptera: Formicidae). Zootaxa 3349: 18-30.
 * Hosoishi, S., and K. Ogata. "Revision of the Crematogaster brevis complex in Asia (Hymenoptera: Formicidae)." Zootaxa 3349 (2012): 18-30.
 * 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
 * Li F. 2007. A Taxonomy Study on Genera Crematogaster and Myrmica from China (Hymenoptera:Formicidae:Myrmicinae). Guangxi Normal University, Guangxi, China. 58 pages.
 * Li Q., Y. Chen, S. Wang, Y. Zheng, Y. Zhu, and S. Wang. 2009. Diversity of ants in subtropical evergreen broadleaved forest in Pu'er City, Yunnan. Biodiversity Science 17(3): 233-239.
 * Li Z.h. 2006. List of Chinese Insects. Volume 4. Sun Yat-sen University Press
 * Liu K. L., M. H. Peng, Y. C. Hung, and K. B. Neoh. 2019. Effects of park size, peri-urban forest spillover, and environmental filtering on diversity, structure, and morphology of ant assemblages in urban park. Urban Ecosystems https://doi.org/10.1007/s11252-019-00851-z)
 * Lu Z., B. D. Hoffmann, and Y. Chen. 2016. Can reforested and plantation habitats effectively conserve SW China’s ant biodiversity? Biodivers. Conserv. DOI 10.1007/s10531-016-1090-1
 * Menozzi C. 1935. Formiche indo-australiane del genere Crematogaster Lund raccolte da W. Karawaiew. Konowia. 14: 103-116.
 * 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 Jue, Li Shen, Huang Enyou, Zhang Benyue. 1985. Notes on ants from Zhoushan islands, Zhejiang (Hymenoptera, Formicidae). Acta Agriculturae Universitatis Chekianensis 11(3): 307-318.
 * Tang Jue, Li Shen, Huang Enyou, Zhang Benyue. 1985. Notes on ants from Zhoushan Islands Zhejiang (Hymenoptera: Formicidae).  Journal of Zhejiang University (Agric.& Life Sci.) 3.
 * Terayama Mamoru. 2009. A synopsis of the family Formicidae of Taiwan (Insecta, Hymenoptera). The Research Bulletin of Kanto Gakuen University 17: 81-266.
 * Xu Z. 1998. A report of fourty-one ant species newly recorded in China from Xishuangbanna District of Yunnan Province (Hymenoptera: Formicidae). Zhongguo Xue Shu Qi Kan Wen Zhai 4: 1119-1121.