Crematogaster

Updated 2026-07-30

Taxonomy

Common name

Often referred to as “acrobat ants” because of their ability to raise their abdomen over the thorax when disturbed.

Morphology

Workers are typically small to medium‑sized ants (2–6 mm).
The gaster (abdomen) is characteristically heart‑shaped and hinged, allowing it to be lifted and pointed upward.
Antennae are 12‑segmented with a distinct club.
Coloration varies among species, ranging from reddish‑brown to black.

Distribution

The genus has a cosmopolitan tropical and subtropical distribution, occurring throughout the Americas, Africa, Asia, Australia, and many Pacific islands.
Species richness is highest in rainforest habitats, but members are also found in savannas, dry woodlands, and urban environments.

Ecology and Behavior

Crematogaster ants are predominantly omnivorous; they tend aphids and other hemipterans for honeydew, scavenge dead insects, and harvest plant material.
Many species construct nests in soil, leaf litter, dead wood, or within the hollow stems of plants.
Some species form mutualistic relationships with plants, inhabiting domatia (specialized cavities) in myrmecophytic trees such as Myrmecodia and Hydnophytum.
Colonies can be monogynous (single queen) or polygynous (multiple queens), depending on species.

Reproductive biology

Nuptial flights are typically synchronized with seasonal rain patterns in tropical regions.
Alate (winged) males and females emerge, mate in flight, and the fertilized queens establish new colonies after shedding their wings.

Notable species

Crematogaster scutellaris – widespread in the Mediterranean region; commonly encountered in human‑modified habitats.
Crematogaster levior – known for its large and aggressive colonies in Southeast Asian rainforests.
Crematogaster lineolata – a North American species frequent in forests and suburban areas.

Economic and environmental relevance

As predators of pest insects and participants in mutualisms with aphids, Crematogaster ants influence arthropod community dynamics.
Species that inhabit plant domatia can provide defensive benefits to their host plants, reducing herbivory.
In some regions, their nesting behavior can cause minor structural damage to wooden structures, but they are not considered major pest ants.

Research significance

The genus is frequently used in studies of ant social organization, mutualism, and biomechanics due to its distinctive gaster articulation.
Molecular phylogenetic analyses have helped clarify evolutionary relationships within Myrmicinae, often using Crematogaster as a representative taxon.

References

Bolton, B. (1995). A New General Catalogue of the Ants of the World. Harvard University Press.
Ward, P. S., et al. (2015). “The evolution of ants: phylogeny, macroevolution and behavior.” Annual Review of Entomology, 60, 525–546.
Hölldobler, B., & Wilson, E. O. (1990). The Ants. Harvard University Press.

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