Crematogaster ampla

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Crematogaster ampla
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Crematogastrini
Genus: Crematogaster
Species: C. ampla
Binomial name
Crematogaster ampla
Forel, 1912

Crematogaster ampla casent0173929 profile 1.jpg

Crematogaster ampla casent0173929 dorsal 1.jpg

Specimen labels

In somes areas of Brazil C. ampla is parasitized by the xenobiont Cephalotes specularis, which is able to find and exploit foraging trails of C. ampla.

Photo Gallery

  • The stereotyped, raised body posture of a foraging Crematogaster ampla worker; B. the same raised body posture seen in a foraging worker of the turtle ant Cephalotes specularis when running in C. ampla foraging trails. Photo by Scott Powell in Powell et al. 2018. Figure 1. A).


Longino (2003) - A Crematogaster crinosa-complex species. Crematogaster ampla has a distinctive character that distinguishes it from all other Crematogaster. The fourth abdominal tergite has a subtriangular impression posterior to the postpetiolar insertion. This impression is completely smooth and shining, contrasting with the surrounding granular microsculpture. On some small workers the fourth abdominal tergite is completely smooth and shining, but the triangular impression is still distinct. In all other Crematogaster there may be an impression anterior to the postpetiole, but not posterior to it. Other characters are similar to crinosa, including a long, acute, anteroventral petiolar tooth, abundant setae on the fourth abdominal tergite, dorsal and posterior faces of propodeum meeting at an angle, and a strongly arched promesonotum. Unlike other crinosa complex species, the scapes and tibiae sometimes have one or two erect setae, especially on large workers.


Distribution based on Regional Taxon Lists

Neotropical Region: Bolivia, Brazil, Colombia (type locality), Mexico, Panama, Paraguay.

Distribution based on AntMaps


Distribution based on AntWeb specimens

Check data from AntWeb


Koch et al. (2018) sampled this species in Caryocar barsiliense trees, in southeastern Brazil cerrado, as part of a study examining species interactions in ant-plants.



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

  • ampla. Crematogaster brevispinosa var. ampla Forel, 1912f: 211 (w.) COLOMBIA. Combination in C. (Orthocrema): Emery, 1922e: 134. Raised to species: Longino, 2003a: 128.

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


Type Material

Longino (2003) - Syntype workers: Colombia, Magdalena, Santa Cruz near Santa Marta (Forel) Musee d'Histoire Naturelle Genève (examined, worker here designated LECTOTYPE).

The syntypes at MHNG were a combination of Crematogaster ampla and Crematogaster crinosa, necessitating designation of a lectotype.


  • Emery, C. 1922c. Hymenoptera. Fam. Formicidae. Subfam. Myrmicinae. [part]. Genera Insectorum 174B: 95-206 (page 134, Combination in C. (Orthocrema))
  • Forel, A. 1912g. Formicides néotropiques. Part III. 3me sous-famille Myrmicinae (suite). Genres Cremastogaster et Pheidole. Mém. Soc. Entomol. Belg. 19: 211-237 (page 211, worker described)
  • Koch, E. B. A., W. Dattilo, F. Camarota, and H. L. Vasconcelos. 2018. From species to individuals: does the variation in ant-plant networks scale result in structural and functional changes? Population Ecology. 60:309-318. doi:10.1007/s10144-018-0634-5
  • Longino, J.T. 2003a. The Crematogaster of Costa Rica. Zootaxa 151: 1-150. (page 128, Raised to species: new status)
  • Powell, S., Del-Claro, K., Feitosa, R.M. & Brandao, C.R.F. 2014. Mimicry and eavesdropping enable a new form of social parasitism in ants. American Naturalist 184, 500-509. doi:10.1086/677927