Crematogaster inflata

Specimens from Sabah were collected from secondary wet forest, in carton on a tree trunk, and from rainforest, on low vegetation.

Identification
A member of the Crematogaster inflata species-group. Hosoishi and Ogata (2009) - The bicolored pattern of yellow and red-brown is distinctive and unique to this species. This coloration is possibly a model in Batesian mimicry with other arthropods (Maruyama et al. 2003; Ito et al., 2004).

Distribution based on Regional Taxon Lists
Indo-Australian Region: Borneo, Indonesia, Malaysia, Philippines, Singapore. Oriental Region: India, Thailand.

Nomenclature

 * . Crematogaster inflatus Smith, F. 1857a: 76, pl. 2, fig. 2 (w.) SINGAPORE, BORNEO (East Malaysia: Sarawak).
 * Type-material: lectotype worker (by designation of Hosoishi & Ogata, 2009b: 23), 4 paralectotype workers.
 * Type-locality: lectotype Singapore: “Sing. 27” (A.R. Wallace); paralectotypes: with same data, and paralectotypes Malaysia: Sarawak, “Sar.”, “Sar. 9” (A.R. Wallace).
 * [Note: Hosoishi & Ogata, 2009b: 23, record only lectotype + 4 paralectotypes; but original syntypes are 8 in number: 5 in OXUM, and 3 in BMNH.]
 * Type-depositories: BMNH, OXUM.
 * Santschi, 1928h: 128 (q.).
 * Combination in C. (Physocrema): Forel, 1912f: 220.
 * Status as species: Smith, F. 1858b: 136; Mayr, 1862: 767; Mayr, 1863: 404; Roger, 1863b: 37; Mayr, 1867a: 106 (redescription); Smith, F. 1871a: 329; Mayr, 1872: 153; Mayr, 1879: 680 (in key); Emery, 1887b: 466; Dalla Torre, 1893: 82; Emery, 1900d: 691; Forel, 1903a: 682; Bingham, 1903: 145; Wheeler, W.M. 1908d: 390; Forel, 1915a: 28; Viehmeyer, 1916a: 126; Wheeler, W.M. 1919e: 75; Emery, 1922e: 140; Santschi, 1928h: 128; Donisthorpe, 1932c: 450; Menozzi, 1932d: 6; Donisthorpe, 1941l: 226 (in key); Chapman & Capco, 1951: 103; Bolton, 1995b: 154; Jaitrong & Nabhitabhata, 2005: 19; Hosoishi & Ogata, 2009a: 5 (redescription); Hosoishi & Ogata, 2009b: 23 (redescription); Pfeiffer, et al. 2011: 45; Bharti, Guénard, et al. 2016: 36.
 * Senior synonym of moorei: Hosoishi & Ogata, 2009b: 23.
 * Distribution: India, Indonesia (Java, Kalimantan), Malaysia (Peninsula, Sabah, Sarawak), Myanmar, Philippines (Luzon), Singapore, Thailand.
 * moorei. Crematogaster (Physocrema) moorei Donisthorpe, 1941l: 225 (w.) PHILIPPINES (Luzon I.).
 * Type-material: holotype worker.
 * Type-locality: Philippines: Luzon, Bagnio, 25.ii.1920, BM1922.101 (A. Moore).
 * Type-depository: BMNH.
 * Status as species: Chapman & Capco, 1951: 98; Baltazar, 1966: 251; Bolton, 1995b: 158.
 * Junior synonym of inflata: Hosoishi & Ogata, 2009b: 23.

Worker
Hosoishi and Ogata (2009) - 0.86–1.08; HL 0.85–1.05; CI 101–103; SL 0.85–0.96; SI 89–98; EL 0.20–0.22; PW 0.61–0.66; WL 1.18–1.34; PSL 0; PtL 0.32–0.38; PtW 0.23–0.27; PtH 0.16–0.19; PpL 0.18–0.20; PpW 0.24–0.30; PtHI 46–50; PtWI 67–71; PpWI 139–147; WI 106–110 (Three workers measured).

Workers polymorphic in size.

Scape exceeding posterior corner of head even for large workers.

In lateral view, pronotum convex; mesonotum and propodeum forming a single convexity. Anterior margin of pronotal collar distinctly concave in dorsal view. Metanotal groove slightly convex in dorsal median portion, not so deep and situated almost in the same line with the posterior ridge of pronotum in lateral view; thorax not strongly constricted in middle in dorsal view. In dorsal view, no longitudinal rugulae connecting between mesonotum and propodeum; the boundary distinct except for median portion. Propodeal spiracle situated near the metapleural gland orifice, the distance between them about the same as the propodeal spiracle diameter. Propodeal spines absent.

Clypeus smooth and shining without longitudinal rugulae. Integument smooth and shining.

Standing pilosity sparse, some pairs on dorsal face of head and dorsal portion of mesonotum. Dorsal face of head with appressed setae. Clypeus with abundant short and long setae. Fourth abdominal tergite with abundant appressed setae.

Body bicolored with head, promesonotum, petiole, postpetiole, gaster and legs red-brown and with metanotal and propodeal area yellow.

Type Material
Hosoishi and Ogata (2009) - LECTOTYPE worker from SINGAPORE (left worker of TYPE HYM: 1016 3-4 / 5) (by present designation) and four paralectotype workers: one paralectotype worker from SINGAPORE  and three paralectotype workers from MALAYSIA: Sarawak, Borneo  [examined].

Crematogaster inflatus

Five worker syntypes in, 3 worker syntypes in. Labelled “Sar.” “Sar. 9.” and “Sing. 27.” Sarawak and Singapore are both recorded by Smith.

References based on Global Ant Biodiversity Informatics

 * Blaimer B. B. 2012. Acrobat ants go global  Origin, evolution and systematics of the genus Crematogaster (Hymenoptera: Formicidae). Molecular Phylogenetics and Evolution 65: 421-436.
 * 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
 * Chung A.Y.C., and M. Mohamed. 1996. A comparative study of the ant fauna in a primary and secondary forest in Sabah, Malaysia. In Edwards, D.S. Booth, W.E. and S.C. Choy (eds). Tropical Rainforest Research. Kluwer Academic Publishers. Pp 357-366.
 * Donisthorpe H. 1941. Description of a new species of Crematogaster Lund, subgenus Physocrema Forel, with a list of, and a key to, the known species of the subgenus. Entomologist 74: 225-227.
 * Eguchi K., and S. Yamane. 2003. Species diversity of ants (Hymenoptera, Formicidae) in a lowland rainforest, northwestern Borneo. New Entomol. 52(1,2): 49-59.
 * Emery C. 1887. Catalogo delle formiche esistenti nelle collezioni del Museo Civico di Genova. Parte terza. Formiche della regione Indo-Malese e dell'Australia (continuazione e fine). [concl.]. Ann. Mus. Civ. Stor. Nat. 25(5): 427-473.
 * Emery, C.. "Catalogo delle formiche esistenti nelle collezioni del Museo Civico di Genova. Parte terza. Formiche della regione Indo-Malese e dell'Australia (continuazione e fine)." Annali del Museo Civico di Storia Naturale Giacomo Doria (Genova) (2) 5, no. 25 (1887): 427-473.
 * 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.
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 * Forel A. 1915. Fauna Simalurensis. Hymenoptera Aculeata, Fam. Formicidae. Tijdschr. Entomol. 58: 22-43.
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 * Jaitrong W.; Nabhitabhata, J. 2005. A list of known ant species of Thailand. The Thailand Natural History Museum Journal 1(1): 9-54.
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 * Menozzi, C. 1932. Formiche dell'Isola di Nias. Misc. Zool. Sumatr. 65: 1-13
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 * Pfeiffer M., D. Mezger, and J. Dyckmans. 2013. Trophic ecology of tropical leaf litter ants (Hymenoptera: Formicidae) - a stable isotope study in four types of Bornean rain forest. Myrmecological News 19: 31-41.
 * Pfeiffer M.; Mezger, D.; Hosoishi, S.; Bakhtiar, E. Y.; Kohout, R. J. 2011. The Formicidae of Borneo (Insecta: Hymenoptera): a preliminary species list. Asian Myrmecology 4:9-58
 * Robson Simon Ant Collection, 05-Sept-2014
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 * Smith, F.. "Catalogue of the hymenopterous insects collected at Sarawak, Borneo; Mount Ophir, Malacca; and at Singapore, by A. R. Wallace." Journal of the Proceedings of the Linnean Society of London, Zoology 2 (1857): 42-88.
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