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

Polyrhachis elegantula

Monogynous Non-Parasitic Queen No Gamergate
Sci. Name
Polyrhachis elegantula
Subgenus
Hagiomyrma
Tribe
Camponotini
Subfamily
Formicinae
Author
Kohout, 2013
Distribution
Found in 1 countries
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Introduction

Polyrhachis elegantula is an Australian ant species in the ammon species-group of the subgenus Hagiomyrma. Workers measure 7.51-8.72 mm in total length . They are entirely black with very dark reddish-brown mandibular teeth and a lightly diffused reddish patch on the gaster. This ground-nesting species inhabits lowland open eucalypt forests, Melaleuca-dominated coastal plains, and savannah woodlands in northern Queensland, from Cape York south to around Ingham . Unlike many Polyrhachis species that are arboreal nesters using larval silk, P. elegantula is a ground-nester, making it unusual within its genus . The species name means 'fine, graceful' in Latin, referring to its neat appearance.

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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: Northern Queensland, Australia, lowland open eucalypt forests, Melaleuca-dominated coastal plains, and savannah woodlands [1]
  • Colony Type: Unconfirmed, no specific data on queen number or social structure for this species.
  • Size & Growth:
    • Queen: Size data unavailable, no total length measurements for queens in the research context.
    • Worker: 7.51-8.72 mm [1]
    • Colony: Unknown, no published colony size data.
    • Growth: Unknown, no specific data on growth rate.
    • Development: Unknown, no development timeline data available for this species. (Development time may vary with temperature, but no species-specific information is provided.)
  • Antkeeping:
    • Temperature: Based on tropical origin, keep warm around 24-28°C. Provide a temperature gradient using a heating cable on one side of the nest.
    • Humidity: Provide a humidity gradient, mostly dry nest chamber with one small moist area, as they inhabit open forests.
    • Diapause: No, tropical species do not require hibernation.
    • Nesting: Ground-nesting species, prefer naturalistic setups with soil or sand substrate, or Y-tong/plaster nests [1].
  • Behavior: Generally calm and non-aggressive. As Formicinae, they lack a functional stinger but can spray formic acid as a defense mechanism. Escape risk is moderate due to their size of around 8 mm.
  • Common Issues: ground-nesting requires appropriate substrate depth and conditions to prevent colony stress., tropical species are sensitive to cold, keep above 20°C to avoid harm., standard escape prevention measures are needed despite moderate size., limited availability in the antkeeping hobby may make acquisition difficult.

Housing and Nest Setup

Polyrhachis elegantula is a ground-nesting species that does well in naturalistic setups with a soil or sand substrate. Use a Y-tong (AAC) nest or plaster formicarium with chambers sized for 8 mm ants. Provide a substrate depth of at least 2-3 cm to allow burrowing. The outworld should include a water source and feeding area. Apply Fluon or another barrier to prevent escapes, as workers are moderate climbers [1].

Feeding and Diet

Based on genus patterns, P. elegantula is likely omnivorous. Offer sugar water or honey for energy, and protein sources like small crickets or mealworms. Feed protein 2-3 times per week and keep sugar water available. Remove uneaten prey after 24-48 hours to prevent mold.

Temperature and Heating

As a tropical species from Queensland, keep temperatures around 24-28°C for optimal activity. Use a heating cable on one side of the nest to create a gradient. Avoid prolonged temperatures below 20°C.

Humidity and Water

Provide a humidity gradient with a mostly dry nest and one small moist area, reflecting their open forest habitat. Lightly mist the nest when the substrate appears dry. Good ventilation helps prevent mold.

Behavior and Temperament

Workers are active foragers with a calm temperament. They typically flee when disturbed. As Formicinae, they spray formic acid for defense, which is harmless to humans in normal circumstances. Escape risk is moderate due to their size.

Colony Development

Colony founding behavior is unconfirmed. Development time from egg to worker is unknown for this species. Growth rate is likely moderate based on genus patterns, but no specific data is available.

Frequently Asked Questions

How long does it take for Polyrhachis elegantula to raise first workers?

Development time is unknown for this species, as no specific data is available in the research context.

What temperature do Polyrhachis elegantula need?

Keep them at 24-28°C based on their tropical origin. Avoid temperatures below 20°C for extended periods.

Can I keep multiple queens together?

It is not recommended, as colony type is unconfirmed for this species. No data on multiple queens exists.

Are Polyrhachis elegantula good for beginners?

This is a medium-difficulty species due to tropical temperature requirements and limited availability. Experienced keepers may have more success.

Do they need hibernation or diapause?

No, tropical species like this do not require hibernation.

What do Polyrhachis elegantula eat?

They are likely omnivorous, based on genus patterns. Offer sugar sources and protein like insects.

How big do colonies get?

Colony size is unknown for this species, as no data is available.

When should I move them to a formicarium?

Move to a formicarium once the colony has outgrown the founding setup, but no specific worker count is documented. Prefer ground-nesting setups.

Where is Polyrhachis elegantula found in the wild?

They are native to northern Queensland, Australia, from Cape York Peninsula south to around Ingham, in lowland open eucalypt forests, Melaleuca-dominated coastal plains, and savannah woodlands [1].

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References

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This caresheet is licensed under CC BY-SA 4.0 .