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

Proceratium relictum

Non-Parasitic Queen No Gamergate
Sci. Name
Proceratium relictum
Tribe
Proceratiini
Subfamily
Proceratiinae
Author
Mann, 1921
Distribution
Found in 2 countries
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Introduction

Proceratium relictum is a rare ant species endemic to the Fijian islands of Taveuni and Vanua Levu. Workers are around 5 mm in total length, with a dark reddish-brown body and lighter legs. Queens are larger, around 5.8 mm, with well-developed eyes. This species is found in rainforest, disturbed forest, and under stones . The most distinctive feature is the extremely modified petiolar node, which is scale-like and narrows dramatically from base to apex, making it easily distinguishable from other Proceratium species in Fiji .

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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: Expert
  • Origin & Habitat: Endemic to Fiji, found only on Taveuni and Vanua Levu islands in the northern Fiji archipelago. Inhabits rainforest, disturbed forest, and forest edge gardens, typically under stones [2][1].
  • Colony Type: Colony structure is unconfirmed. No specific data on queen number or social structure.
  • Size & Growth:
    • Queen: ~5.8 mm [1]
    • Worker: ~5 mm [1]
    • Colony: Unknown, no data on maximum colony size.
    • Growth: Unknown
    • Development: Unknown, no data available. (Development timeline has not been studied for this species.)
  • Antkeeping:
    • Temperature: Temperature needs are unclear, start around 22-26°C and observe, as this species is from tropical Fiji [1].
    • Humidity: Keep nest substrate consistently moist but not waterlogged, based on their natural forest habitat [1].
    • Diapause: No, as a tropical species, they do not require diapause [1].
    • Nesting: Natural nesting under stones. In captivity, use soil nests or Y-tong nests with narrow chambers [1].
  • Behavior: Proceratium relictum is cryptic and slow-moving, not aggressive towards keepers. Escape risk is moderate due to their size [1].
  • Common Issues: diet requirements are unconfirmed, making feeding challenging., slow colony growth requires patience., humidity control is critical to prevent desiccation., wild-caught colonies may have parasites or fail to adapt.

Housing and Nest Setup

Proceratium relictum requires a setup that mimics their natural forest floor habitat. Use a layer of moist soil or coconut fiber as substrate, add flat stones for cover, and maintain high humidity. Natural nesting is under stones [1]. In captivity, a Y-tong nest with narrow chambers works well. Keep the nest dark and quiet to reduce disturbances [1].

Feeding and Diet

Diet is unconfirmed for this species. Based on genus patterns, they may specialize in spider eggs, but this has not been documented for Proceratium relictum. Offer small live prey such as fruit fly larvae or pinhead crickets, and observe feeding behavior [1].

Temperature and Humidity

As a tropical species from Fiji, maintain warm and humid conditions. Start with temperatures around 22-26°C and adjust based on colony behavior [1]. Keep the nest substrate consistently moist but not waterlogged [1].

Behavior and Temperament

Proceratium relictum is cryptic and slow-moving, spending most time in the nest. Workers are not aggressive and pose no sting threat. Escape risk is moderate due to their size [1].

Acquisition and Availability

This species is rare in the hobby and endemic to Fiji. Wild-caught colonies may have parasites or fail to adapt. Only experienced keepers should attempt this species [2][1].

Growth and Development

Colony growth is slow and unconfirmed. No data on development timeline [1].

Seasonal Care

As a tropical species, no diapause is required. Maintain consistent conditions year-round [1].

Frequently Asked Questions

Is Proceratium relictum available for purchase?

No, this species is virtually unavailable in the antkeeping hobby due to its endemism to Fiji [2][1].

What do Proceratium relictum ants eat?

Diet is unconfirmed, but based on genus patterns, they may require spider eggs. Offer small live prey and observe [1].

How long does it take for Proceratium relictum to produce first workers?

Unknown, no data on development timeline [1].

Are Proceratium relictum ants aggressive?

No, they are cryptic and non-aggressive, avoiding confrontation [1].

What size colony does Proceratium relictum reach?

Unknown, no data on maximum colony size [1].

Do Proceratium relictum ants need hibernation?

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

What is the best nest type for Proceratium relictum?

Naturalistic setups with soil and stones, or Y-tong nests with narrow chambers [1].

Is Proceratium relictum suitable for beginners?

No, this is an expert-level species due to rarity and unconfirmed care needs [1].

Where is Proceratium relictum found in the wild?

Only on Taveuni and Vanua Levu islands in Fiji, in rainforest and under stones [2][1].

How do I set up a terrarium for Proceratium relictum?

Use moist soil substrate with stones for cover, maintain humidity, and keep the setup dark [1].

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References

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This caresheet is licensed under CC BY-SA 4.0 .