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

Temnothorax gallae

Monogynous Non-Parasitic Queen No Gamergate
Sci. Name
Temnothorax gallae
Tribe
Crematogastrini
Subfamily
Myrmicinae
Author
Smith, 1949
Distribution
Found in 1 countries
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Introduction

Temnothorax gallae is a tiny arboreal ant native to California, USA. Workers measure 3 mm and are dark brown, with a distinctly shaped petiole that appears 'pinched' from the sides when viewed from above. This species is part of the andrei-clade and the Nevadensis-group, closely related to other North American Temnothorax . What makes this ant unique is its nesting preference: it lives exclusively inside cynipid galls on canyon live oak trees (Quercus chrysolepis), including galls made by the wasps Heteroecus pacificus, H. sanctaeclarae, Disholcaspis truckeensis, and Andricus spectabilis . These galls are hollow plant growths, providing an enclosed space high above the ground.

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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: Medium
  • Origin & Habitat: California, USA, found in canyon live oak woodlands, nesting in cynipid galls on oak trees [3][4].
  • Colony Type: Likely single‑queen colonies (monogyne) based on typical Temnothorax biology, but this is unconfirmed. Queens have been collected but not formally described [5].
  • Size & Growth:
    • Queen: Undescribed, queens exist but lack detailed description [5].
    • Worker: 3 mm (total length) [5].
    • Colony: Unknown, specific data unavailable. Modest size based on related species.
    • Growth: Moderate, inferred from genus patterns, unconfirmed.
    • Development: Unknown, specific data unavailable. Temperatures around 22-24 °C are typical for similar species. (Development time likely depends on temperature, no confirmed figures.)
  • Antkeeping:
    • Temperature: Keep at 20-24 °C, matching California’s oak woodland climate [3].
    • Humidity: Provide a moderately damp substrate but avoid waterlogging. These ants naturally inhabit dry galls, so a gradient with drier and moister areas works best [4].
    • Diapause: Likely required. Reduce temperature to 10-15 °C for 2-3 months in winter to mimic natural seasonal changes [3].
    • Nesting: Arboreal setup is critical. Use a small Y‑tong (AAC) or plaster nest with tiny chambers scaled to 3 mm workers. Avoid large, open spaces.
  • Behavior: Docile, peaceful ants. Their defense relies on smearing venom (typical of tribe Crematogastrini). Tiny size makes them escape artists, use fine mesh and tight seals. They prefer fleeing over fighting.
  • Common Issues: escape prevention is critical, they can fit through tiny gaps., specific arboreal nesting requirements may be challenging for beginners., wild‑caught colonies may contain parasites or be hard to find., slow colony growth can test patience., prey must be very small, overfeeding is common.

Housing and Nest Setup

Temnothorax gallae requires an arboreal setup that mimics the hollow galls they live in naturally. In the wild, they nest in cynipid galls on oak trees, enclosed spaces elevated above ground [4]. For captivity, a small Y‑tong (AAC) or plaster nest with very small chambers works best. Scale chambers to the ants' 3 mm size, large open spaces cause stress. Plaster nests also let you control humidity. Escape prevention is essential, use tight‑fitting lids and fine mesh on air holes. A small outworld for foraging completes the setup. Provide twigs or bark pieces for climbing, as these ants are arboreal.

Feeding and Diet

These ants are omnivorous. Offer small protein sources like fruit flies, pinhead crickets, and other tiny insects. Provide sugar water or honey for carbohydrates. In the wild they likely forage for honeydew and small insects in the oak canopy. Feed small amounts every 2-3 days and remove uneaten prey to prevent mold. Because the ants are so small, even tiny prey can be a large meal, avoid overfeeding. [5]

Temperature and Seasonal Care

Keep the colony at room temperature,20-24 °C, which matches California’s oak woodland climate [3]. In winter, provide a diapause period: lower the temperature to 10-15 °C for 2-3 months. This rest period supports colony health and may trigger spring reproduction. Avoid sudden temperature swings or prolonged cold below 10 °C. If your home stays warm year‑round, you can still attempt diapause by moving the nest to a cooler room or fridge (with precautions against condensation).

Handling and Colony Maintenance

Due to their 3 mm size, handle Temnothorax gallae with care. They are not aggressive, their defense is smearing venom, not stinging, but they are fragile. When cleaning or moving the colony, work slowly and gently. Colony growth is moderate, don't expect rapid expansion. Queens may live several years. Monitor regularly for mold, escapes, and food freshness. Because they are arboreal, they prefer stable, quiet nest conditions, avoid frequent disturbance. [5]

Frequently Asked Questions

Can I keep Temnothorax gallae in a test tube?

Yes, test tubes work for the founding stage, but these ants are arboreal and prefer enclosed spaces. Once the colony reaches about 15-20 workers, transfer them to a small Y‑tong or plaster nest with appropriately sized chambers. The key is providing small, tight spaces that mimic galls.

How long until Temnothorax gallae produces first workers?

Specific development data isn't available. For similar Temnothorax species, workers appear roughly 6-10 weeks after eggs are laid at 22-24 °C. This is an estimate, actual timing may vary.

Do Temnothorax gallae ants sting?

They have a modified stinger used for smearing venom rather than piercing. Their tiny size means the effect on humans is negligible. They are peaceful and prefer to flee, so stinging incidents are rare.

Are Temnothorax gallae good for beginners?

This species is rated medium difficulty. Their tiny size and specific arboreal nesting needs make them better for keepers with some experience. Escape prevention and providing appropriate housing are the main challenges. Beginners may find larger, more forgiving species easier.

What do Temnothorax gallae eat?

They are omnivorous. Offer small protein sources like fruit flies, pinhead crickets, or tiny mealworms. Sugar water or honey provides carbohydrates. Feed small amounts every 2-3 days and remove leftovers to avoid mold.

Do Temnothorax gallae need hibernation?

Yes, a winter rest period is recommended based on their California climate. Reduce temperatures to 10-15 °C for 2-3 months. This diapause supports colony health and may stimulate spring reproduction [3].

Why are my Temnothorax gallae escaping?

Their 3 mm size makes them superb escape artists. They can squeeze through gaps you didn't notice. Use fine mesh on ventilation, ensure lids fit tightly, and apply Fluon or a similar barrier around the nest perimeter. Check daily for new gaps.

How big do Temnothorax gallae colonies get?

Colony size is unconfirmed. Related Temnothorax species often reach a few hundred workers. Expect modest growth over several years, not rapid expansion.

When should I move Temnothorax gallae to a formicarium?

Move them when the founding setup becomes too small (e.g., a test tube is crowded). With these ants, small is better, use a nest with chambers no larger than a few centimeters. Avoid oversized formicaria.

Can I keep multiple Temnothorax gallae queens together?

This species is thought to be monogyne, so keeping multiple queens together is not recommended, they likely fight. If you find a colony with several queens in the wild, it might be temporary pleometrosis (co‑founding), not permanent polygyny.

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References

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