Scientific illustration of Tetramorium impressum ant - showing key identification features including head, thorax, and gaster.

Tetramorium impressum

Non-Parasitic Queen No Gamergate
Sci. Name
Tetramorium impressum
Tribe
Crematogastrini
Subfamily
Myrmicinae
Author
Viehmeyer, 1925
Distribution
Found in 1 countries
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Introduction

Tetramorium impressum is a small ground-dwelling ant from southwestern Western Australia. Workers measure 2.9–4.1mm and range from yellow-brown to mid-brown, often with a lighter gaster than the rest of the body . It may actually be a group of closely related species – some workers have black foreparts and yellow gasters, while others are reddish with finer body sculpture . This ant is common in newly rehabilitated sand mines and other early successional habitats, where it collects seeds of grasses and herbs . It becomes much less abundant as the habitat matures and is considered an opportunist species .

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Status by country, from Kass et al. 2022 & Wong et al. 2023

Native Invasive Introduced (indoor) Intercepted Unknown
Data Sources
Year Range 2000 - 2026

Quick Summary

  • Difficulty: Easy
  • Origin & Habitat: Southwestern Western Australia, especially around Perth. Found in open, disturbed areas like freshly rehabilitated sand mines and early successional sites [1].
  • Colony Type: Unconfirmed – likely single-queen colonies based on typical Tetramorium patterns, but not documented for this species.
  • Size & Growth:
    • Queen: Size data unavailable – queens are known from a single headless specimen, so no reliable measurements exist [1].
    • Worker: 2.9–4.1mm (total length) [1]

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References

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This caresheet is licensed under CC BY-SA 4.0 .