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

Polyrhachis exotica

Non-Parasitic Queen No Gamergate
Sci. Name
Polyrhachis exotica
Subgenus
Myrmhopla
Tribe
Camponotini
Subfamily
Formicinae
Author
Kohout, 1987
Distribution
Found in 1 countries
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Introduction

Polyrhachis exotica is a large ant native to the Philippines. Workers measure 13.31-14.66 mm in total length, and queens measure 16.08-16.63 mm . It has a domed pronotum, long curved spines, and a smooth, shiny gaster. The body is black to dark reddish brown with reddish-brown legs and mandibles . This species is endemic to the Philippines . Nothing is known about its biology in the scientific literature, so care recommendations are based on inference from related Polyrhachis 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: Medium
  • Origin & Habitat: Philippines, endemic to this region [2].
  • Colony Type: Colony structure is unconfirmed due to lack of data.
  • Size & Growth:
    • Queen: ~16.08-16.63 mm [1]
    • Worker: ~13.31-14.66 mm [1]
    • Colony: Unknown, no colony size data exists
    • Growth: Moderate, inferred from genus patterns
    • Development: Estimated 6-10 weeks based on typical Polyrhachis development at tropical temperatures [1] (Direct development data unavailable, estimate based on related species)
  • Antkeeping:
    • Temperature: Keep warm, roughly 24-28°C, with a temperature gradient. Based on tropical species patterns [1].
    • Humidity: Keep nest substrate consistently moist but not waterlogged. Based on tropical habitat [1].
    • Diapause: Unknown, no data on hibernation for this species.
    • Nesting: Inferred from genus: prefer rotting wood or soil nests. Use Y-tong, plaster, or naturalistic setups [1].
  • Behavior: As Formicinae, they defend by biting and spraying formic acid. Workers are moderately active. Escape risk is low due to large size.
  • Common Issues: humidity control is critical, tropical ants easily die in dry conditions, temperature must remain warm, cool conditions will slow or stop brood development, wild-caught colonies may carry parasites that are difficult to treat, slow growth can frustrate beginners, patience is required

Appearance and Identification

Polyrhachis exotica workers measure 13.31-14.66 mm in total length, and queens measure 16.08-16.63 mm [1]. The species has a domed pronotum, long curved spines on the pronotum and propodeum, and a smooth, shiny gaster, which is unique among related species [1]. Body color is black to dark reddish brown with reddish-brown appendages [1].

Natural History

Polyrhachis exotica is endemic to the Philippines [2]. Beyond distribution, nothing is known about its biology in the scientific literature [1]. Care must be inferred from related Polyrhachis species, which typically nest in rotting wood or soil and feed on honeydew and insects [1].

Temperature and Care

As a tropical species, Polyrhachis exotica requires warm temperatures. Keep the nest area at 24-28°C with a gradient [1]. Temperature stability is important for brood development [1].

Humidity and Nesting

High humidity is essential for this tropical species. Keep the nest substrate consistently moist but not waterlogged [1]. Use Y-tong, plaster, or naturalistic nests with damp soil [1].

Feeding and Diet

Based on genus patterns, Polyrhachis species are omnivorous, feeding on honeydew, nectar, and small insects [1]. In captivity, offer sugar sources and protein like small insects [1].

Colony Development

Founding behavior is unconfirmed. Based on genus patterns, queens may seal themselves in a chamber [1]. Development from egg to worker is estimated at 6-10 weeks at optimal temperatures [1].

Frequently Asked Questions

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

The exact timeline is unknown, but based on typical Polyrhachis development, expect 6-10 weeks from egg to first worker at optimal tropical temperatures [1].

What temperature do Polyrhachis exotica ants need?

Keep them at 24-28°C with a gradient, as they are a tropical species [1].

Can I keep Polyrhachis exotica in a test tube?

A test tube can work for a founding queen, but transfer to a larger nest as the colony grows [1].

How big do Polyrhachis exotica colonies get?

The maximum colony size is unknown, no wild colony data exists [1].

Do Polyrhachis exotica need hibernation?

Unknown, no data on hibernation for this species.

What do Polyrhachis exotica eat?

Based on genus patterns, they likely accept sugar sources and protein [1].

Is Polyrhachis exotica good for beginners?

This species is rated Medium difficulty due to lack of documented biology [1].

Can I keep multiple Polyrhachis exotica queens together?

Colony structure is unconfirmed, so keeping one queen per colony is recommended [1].

Why is my Polyrhachis exotica colony dying?

Common causes include too low temperature, too dry conditions, or parasites from wild-caught colonies. Review temperature and humidity first.

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References

Creative Commons License

This caresheet is licensed under CC BY-SA 4.0 .