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

Polyrhachis viehmeyeri

Non-Parasitic Queen No Gamergate
Sci. Name
Polyrhachis viehmeyeri
Subgenus
Myrmhopla
Tribe
Camponotini
Subfamily
Formicinae
Author
Emery, 1921
Distribution
Found in 1 countries
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Introduction

Polyrhachis viehmeyeri is a medium-sized ant species native to New Guinea and Papua New Guinea. Workers measure 7.5-8.5mm (TL 7.46-8.52mm) and queens measure 8.5-8.9mm (TL 8.47-8.87mm) . They have distinctive long, slender spines on the pronotum, propodeum, and petiole, and are mostly reddish-brown with abundant bristle-like hairs . This species is found in tropical rainforest environments at elevations around 1100 feet in northeastern New Guinea . As a tropical Polyrhachis species, they are likely arboreal or semi-arboreal based on genus patterns, nesting in elevated locations like vegetation or hollow twigs . They are active foragers with a moderate growth rate.

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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 Guinea and Papua New Guinea, tropical rainforest environments at low to mid elevations (around 1100 ft/335m) [1].
  • Colony Type: Colony structure is unconfirmed. Based on typical Polyrhachis patterns, likely single-queen colonies but further research needed.
  • Size & Growth:
    • Queen: ~8.5-8.9 mm [1]
    • Worker: ~7.5-8.5 mm [1]
    • Colony: Unknown, no colony size data available.
    • Growth: Moderate, estimated based on genus patterns [2].
    • Development: Estimated 6-10 weeks at optimal temperature [2]. (Development time is estimated as no direct study exists for this species.)
  • Antkeeping:
    • Temperature: Keep warm, roughly 24-28°C, based on tropical origin [2]. A heating cable can create a gradient.
    • Humidity: Keep nest substrate consistently moist but not waterlogged, based on tropical rainforest habitat [2].
    • Diapause: No diapause required, as a tropical species [2].
    • Nesting: Provide Y-tong or plaster nests with climbing structures, based on semi-arboreal preferences [2].
  • Behavior: Generally peaceful as Formicinae. They lack a stinger but may spray formic acid when threatened. Active foragers and good climbers. Use barriers for escape prevention.
  • Common Issues: high humidity maintenance is critical, dry conditions can cause colony decline [2], temperatures below 22°C can stress the colony [2], semi-arboreal nature requires climbing structures, avoid flat setups [2], wild-caught colonies may have parasites affecting survival, slow initial growth may lead to overfeeding problems

Housing and Nest Setup

Polyrhachis viehmeyeri is likely semi-arboreal, so provide a setup with climbing structures. Use Y-tong (AAC) or plaster nests, and add twigs, artificial plants, or cork bark vertically in the outworld [2]. The outworld should be escape-proof with barriers on the rim [2].

Feeding and Diet

These ants are omnivorous. Offer sugar water or honey constantly for energy, and protein sources like fruit flies or small insects 2-3 times per week [2]. Remove uneaten prey after 24-48 hours to prevent mold.

Temperature and Heating

Keep the nest area warm, roughly 24-28°C, based on their tropical origin [2]. Use a heating cable on one side to create a gradient if room temperature is insufficient.

Humidity and Water

Keep the nest substrate consistently moist but not waterlogged, as they come from humid environments [2]. Provide a water source in the outworld, like a test tube with cotton.

Colony Development

Queens are slightly larger than workers, with sizes as noted [1]. Founding behavior is unconfirmed. Expect slow initial growth, with first workers in 6-10 weeks at optimal temperature [2].

Frequently Asked Questions

How long does it take for Polyrhachis viehmeyeri to have first workers?

Expect 6-10 weeks from egg to first worker at optimal temperature, based on related species estimates [2]. The first workers will be smaller than mature workers.

What temperature do Polyrhachis viehmeyeri ants need?

Keep them warm, roughly 24-28°C, based on their tropical origin [2]. Avoid temperatures below 22°C.

Do Polyrhachis viehmeyeri ants need hibernation?

No, hibernation is not required as a tropical species [2]. They remain active year-round.

What do Polyrhachis viehmeyeri ants eat?

They are omnivorous. Offer sugar water or honey constantly, and protein sources like fruit flies or small insects 2-3 times per week [2].

Are Polyrhachis viehmeyeri good for beginners?

They are rated as medium difficulty. The main challenges are maintaining high humidity and warm temperatures year-round [2].

How big do Polyrhachis viehmeyeri colonies get?

Colony size is not well documented, but growth is moderate [2]. No specific data on maximum size.

Can I keep multiple Polyrhachis viehmeyeri queens together?

The colony structure is unconfirmed. It is not recommended to combine unrelated foundress queens, as fighting is likely [2].

What type of nest is best for Polyrhachis viehmeyeri?

Semi-arboreal species do well in Y-tong or plaster nests with climbing structures [2]. Avoid completely flat setups.

Why is my Polyrhachis viehmeyeri colony declining?

Common causes include temperatures below 22°C, low humidity, dry nest conditions, or overfeeding leading to mold [2]. Check environmental factors first.

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References

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This caresheet is licensed under CC BY-SA 4.0 .