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

Polyrhachis contemta

Monogynous Non-Parasitic Queen No Gamergate
Sci. Name
Polyrhachis contemta
Subgenus
Chariomyrma
Tribe
Camponotini
Subfamily
Formicinae
Author
Mayr, 1876
Distribution
Found in 1 countries
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Introduction

Polyrhachis contemta is a small to medium-sized ant in the genus Polyrhachis, known for spiny projections on the thorax. Worker size is approximately 5-7 mm, but exact measurements are unavailable; this is inferred from Polyrhachis genus patterns . The species is native to New Caledonia , inhabiting forested areas. A key feature is their spiny morphology, which serves as a primary defense mechanism against predators .

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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: New Caledonia, forested habitats [2]
  • Colony Type: Unconfirmed
  • Size & Growth:
    • Queen: Size data unavailable, inferred from Polyrhachis genus [1]
    • Worker: Size data unavailable, inferred from Polyrhachis genus [1]
    • Colony: Colony size data unavailable, based on Polyrhachis genus patterns, may reach several hundred workers [1]
    • Growth: Moderate, inferred from tropical Formicinae patterns [1]
    • Development: 6-10 weeks at 25-28°C, inferred from tropical Formicinae patterns [1] (Development time is estimated, specific data for P. contemta is unavailable.)
  • Antkeeping:
    • Temperature: 24-28°C, inferred from tropical habitat [1]
    • Humidity: High humidity,70-85%, keep nest substrate consistently moist but not waterlogged [1]
    • Diapause: No, tropical species do not require diapause [1]
    • Nesting: Arboreal or semi-arboreal nesting preferred, inferred from genus patterns [1]
  • Behavior: Generally peaceful and not aggressive, inferred from Polyrhachis genus [1]. Escape risk is moderate due to size, ensure secure enclosures.
  • Common Issues: high humidity can lead to mold growth if ventilation is inadequate, balance is key, tropical species may struggle if room temperature drops below 22°C during winter, arboreal nesting preferences may require specialized housing like Y-tong or cork nests

Housing and Nest Preferences

Polyrhachis contemta is native to New Caledonia [2]. In the wild, Polyrhachis species often nest arboreally in hollow branches or under bark [1]. For captive care, provide Y-tong, cork, or naturalistic nests with wood structures. Test tube setups can work if humidity is maintained, but arboreal-style housing better matches their natural preferences [1]. Ensure the nest has multiple chambers and an outworld for foraging.

Feeding and Diet

Polyrhachis species are omnivorous, feeding on small insects and sugar sources [1]. Offer protein like fruit flies or pinhead crickets 2-3 times per week, and provide constant sugar water or honey. Remove uneaten prey after 24-48 hours to prevent mold in humid conditions [1].

Temperature and Seasonal Care

Maintain temperatures between 24-28°C year-round, as this species is tropical [1]. Use a heating cable to create a gentle gradient. Avoid temperatures below 22°C for extended periods. No diapause is required [1].

Humidity Management

High humidity is critical, aim for 70-85% [1]. Keep nest substrate consistently moist but not waterlogged. Balance humidity with ventilation to prevent mold growth, which can be deadly [1].

Behavior and Handling

Polyrhachis contemta is generally calm and not aggressive toward keepers [1]. Their spiny morphology is used for defense against predators [1]. Workers are moderate in size, so escape risk is manageable with secure lids [1].

Frequently Asked Questions

How long does it take for Polyrhachis contemta to produce first workers?

Based on tropical Formicinae patterns, expect first workers in 6-10 weeks at 25-28°C [1]. Specific data for this species is unavailable.

Can I keep Polyrhachis contemta in a test tube setup?

Yes, but maintain high humidity and consider transitioning to arboreal-style housing like Y-tong or cork nests once the colony grows [1].

What temperature range is best for Polyrhachis contemta?

Keep them at 24-28°C consistently, as they are tropical and do not tolerate cool temperatures well [1].

How often should I feed Polyrhachis contemta?

Offer protein 2-3 times per week and keep sugar sources available at all times [1].

Do Polyrhachis contemta need hibernation?

No, as a tropical species, they do not require diapause [1].

How big do Polyrhachis contemta colonies get?

Colony size data is unavailable, but based on Polyrhachis genus patterns, they may reach several hundred workers [1].

Is Polyrhachis contemta good for beginners?

This species is rated Medium difficulty due to humidity and housing needs [1].

Can I keep multiple Polyrhachis contemta queens together?

Colony type is unconfirmed, but combining unrelated queens is not recommended as they may fight [1].

Why is my Polyrhachis contemta colony declining?

Common causes include low temperature, improper humidity, or insufficient diet. Review conditions first [1].

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References

Creative Commons License

This caresheet is licensed under CC BY-SA 4.0 .