Crematogaster daisyi

This species is known only from Malaysia (Borneo).

Identification
A member of the Crematogaster ranavalonae-group

Hosoishi (2015) - This species is similar to Crematogaster sikkimensis, but differs in having the spiracles on the petiole located on the lower position in lateral view.

Distribution based on Regional Taxon Lists
Indo-Australian Region: Borneo, Indonesia, Malaysia.

Nomenclature

 *  daisyi. Crematogaster (Oxygyne) daisyi Forel, 1901e: 376 (w.q.) BORNEO.

Worker
Hosoishi (2015) - (n = 6). HW 0.79-0.88; HL 0.74-0.83; CI 101-107; SL 0.68-0.76; SI 86-90; EL 0.17-0.18; PW 0.49-0.54; WL 0.91-0.97; PSL 0.11-0.15; PtL 0.22-0.24; PtW 0.22-0.26; PtH 0.13-0.15; PpL 0.15-0.17; PpW 0.27- 0.33; PtHI 59-68; PtWI 100-130; PpWI 169-200; WI 107-136.

Head appearing subquadratic in front view. Mandible weakly striate, with four teeth, apical and subapical teeth large, basal two teeth smaller. Scape exceeding posterior corner of head, with appressed setae, each of which is as long as width of scape. Compound eye large and slightly projecting beyond lateral margin of head in full face view.

Ventrolateral katepisternal ridge indistinct posteriorly. Propodeal spine long and stout; length greater than spiracle, directed upward, dorsum higher than anterior propodeum in lateral view. Propodeal spiracle large, touching to propodeal declivity in lateral view, directed laterally.

In dorsal view, shape of petiole scoop with convex side, longer than broad. Petiole with subparallel side on anterior half in dorsal view. Petiolar spiracle large, as large as half of propodeal spiracle, directed downward. Postpetiole bilobed with longitudinal median sulcus. Postpetiole wider than petiole in dorsal view.

Integument essentially smooth and shiny. Clypeus smooth and shiny without rugulae. Malar regions generally smooth. Dorsal surface of promesonotum smooth and shiny. Lateral surface of pronotum smooth and shiny. Mesopleuron and lateral propodeum generally shiny, but with feable rugulae. Dorsal surface of propodeum smooth and shiny.

Erect pilosity almost absent. Dorsum of head, clypeus and mesosoma with short and appressed setae sparsely. Clypeus with one pair of longer setae on anteriormost portion, directed medially. Anterior clypeal margin with two pairs of longer setae, mixed with some shorter setae on sides. No erect setae on pronotal shoulder. Posterolateral tubercle with some decumbent to appressed shorter setae. Ventral surface of petiole with appressed setae. Postpetiole with some shorter setae posteriorly. Fourth abdominal tergite with appressed setae.

Body color reddish brown.

References based on Global Ant Biodiversity Informatics

 * Blaimer B. B. 2012. Untangling complex morphological variation: taxonomic revision of the subgenus Crematogaster (Oxygyne) in Madagascar, with insight into the evolution and biogeography of this enigmatic ant clade (Hymenoptera: Formicidae). Systematic Entomology 37: 240-260
 * Blaimer, B.. "Untangling complex morphological variation: taxonomic revision of the subgenus Crematogaster (Oxygyne) in Madagascar, with insight into the evolution and biogeography of this enigmatic ant clade (Hymenoptera: Formicidae)." Systematic Entomology 37 (2012): 240-260.
 * 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
 * Forel A. 1901. Variétés myrmécologiques. Annales de la Société Entomologique de Belgique 45: 334-382.
 * Hosoishi S. 2015. Revision of the Crematogaster ranavalonae-group in Asia, with description of two new species (Hymenoptera, Formicidae). Journal of Hymenoptera Research 42: 63-92.
 * 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.
 * 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
 * Wheeler W. M. 1919. The ants of Borneo. Bulletin of the Museum of Comparative Zoology 63:43-147.