Crematogaster yappi

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Crematogaster yappi
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Crematogastrini
Genus: Crematogaster
Species: C. yappi
Binomial name
Crematogaster yappi
Forel, 1901

Crematogaster yappi casent0908593 p 1 high.jpg

Crematogaster yappi casent0908593 d 1 high.jpg

Specimen Labels

This species is known only from the type locality in Malaysia (Peninsula).


Hosoishi and Ogata (2012) - This species can be easily distinguished from other species of the C. brevis complex found in Asia by its undeveloped propodeal spines.

Keys including this Species


Distribution based on Regional Taxon Lists

Indo-Australian Region: Malaysia (type locality).

Distribution based on AntMaps


Distribution based on AntWeb specimens

Check data from AntWeb




The following information is derived from Barry Bolton's New General Catalogue, a catalogue of the world's ants.

  • yappi. Crematogaster yappi Forel, 1901e: 374 (w.) WEST MALAYSIA. Combination in C. (Acrocoelia): Emery, 1922e: 152; in C. (Crematogaster): Bolton, 1995b: 166. See also: Hosoishi & Ogata, 2012: 28.

Unless otherwise noted the text for the remainder of this section is reported from the publication that includes the original description.



Hosoishi and Ogata (2012) - HW 0.65-0.74; HL 0.66-0.75; CI 94-105; SL 0.48-0.54; SI 70-77; EL 0.11-0.15; PW 0.34-0.4; WL 0.71-0.81; PSL 0; PtL 0.18-0.22; PtW 0.21-0.24; PtH 0.12-0.15; PpL 0.12-0.14; PpW 0.17-0.2; PtHI 67-74; PtWI 105-111; PpWI 129-167; WI 77-90 (Lectotype and five paralectotype workers measured).

Compound eyes slightly projecting from lateral margin of head. Scape reaching posterior corner of head, the scape with standing setae.

Anterior margin of pronotal collar almost straight in dorsal view. Metanotal groove concave in lateral view. Propodeal spines undeveloped. Anterior margin of metapleural gland bulla almost reaching anterior margin of propodeal spiracle.

Petiole in dorsal view broader anteriorly than posteriorly. Postpetiole weakly bilobed, but without a distinct longitudinal median sulcus. Subpetiolar and subpostpetiolar processes undeveloped.

Dorsal surface of head generally smooth and shining, but the lower portion near clypeal margin with longitudinal rugulae. Clypeus relatively smooth, 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. Mesopleuron relatively smooth, but with feeble rugulae on the higher portion.

Fourth abdominal tergite with sparse standing setae.

Type Material

Hosoishi and Ogata (2012) - LECTOTYPE worker (bottom specimen of three on one pin, Musee d'Histoire Naturelle Genève worker) (by present designation) and five paralectotype workers from MALAYSIA: Gunung Inas, Kedah (M. R. H. Yapp) (MHNG, Naturhistorisches Museum, Basel) [examined].


  • Emery, C. 1922c. Hymenoptera. Fam. Formicidae. Subfam. Myrmicinae. [part]. Genera Insectorum 174B: 95-206 (page 152, Combination in C. (Acrocoelia))
  • Forel, A. 1901j. Variétés myrmécologiques. Ann. Soc. Entomol. Belg. 45: 334-382 (page 374, worker described)
  • Hosoishi, S. & Ogata, K. 2012. Revision of the Crematogaster brevis complex in Asia (Hymenoptera: Formicidae). Zootaxa. 3349:18-30.