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

Aenictus nyuyi

Non-Parasitic Queen No Gamergate
Sci. Name
Aenictus nyuyi
Subfamily
Dorylinae
Author
Gómez, 2022
Distribution
Found in 1 countries
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Introduction

Aenictus nyuyi is a tiny army ant from the forests of southeastern Senegal. Workers are light brown to brown with exceptionally long antennae that extend well beyond three-quarters of the head length . They are known only from the Afia Forest near Dindefelo, where they were collected in leaf litter samples from a gallery forest habitat . The species name "nyuyi" comes from the Fula word for "small ant, " reflecting their diminutive size . Only worker ants have ever been found, no queens or males are known, and the species was described scientifically in 2022 . This species cannot be kept in captivity. Only workers have been collected, meaning no queens are available to start a colony. Additionally, Aenictus army ants have biology that does not fit standard ant-keeping practices .

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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: Southeastern Senegal (Kedougou, Afia Forest), gallery forest leaf litter at 395m elevation [1][2]
  • Colony Type: Unknown, only worker caste found [1]
  • Size & Growth:
    • Queen: Unknown, no queens have ever been found [1]
    • Worker: Size data unavailable, Aenictus workers typically range 2-5mm [1]
    • Colony: Unknown [1]
    • Growth: Unknown
    • Development: Unknown (No data available on development timing [1])
  • Antkeeping:
    • Temperature: Unknown, tropical gallery forest suggests warm conditions [2]
    • Humidity: Unknown, forest floor habitat suggests moderate to high humidity [2]
    • Diapause: No, tropical species from Senegal [2]
    • Nesting: Unknown, collected in leaf litter, natural nesting substrate unobserved [1]
  • Behavior: Army ant biology, likely nomadic with predatory behavior. Extremely small size makes escape through standard barriers inevitable [1].
  • Common Issues: only workers are known, no queens have been found, making captive colony founding impossible., extremely small size allows escape through standard mesh and gaps., army ant biology typically requires massive colony sizes and specialized care not practical in captivity., known from single location, removing specimens may impact the wild population.

Why This Species Is Not Currently Keepable

This species was described in 2022 from only ten workers collected in Senegal [1]. No queens have ever been found, which means you cannot start a colony from a single queen as you would with most ants [1]. Army ants like Aenictus typically reproduce through colony fission rather than single queen founding, requiring an existing colony to split [2]. Their extremely small size means they would escape any standard ant farm setup [1].

Morphology and Size

Workers are among the smallest ants, with head widths of just 0.47-0.54mm [1]. Their most distinctive feature is their exceptionally long scapes (the first antenna segment), which extend well beyond three-quarters of the head length, this is unusual compared to other Aenictus species in the rotundatus complex [1]. The head is rectangular and longer than it is wide, and the body is light brown to brown with a smooth, glassy appearance [1].

Natural History and Habitat

Aenictus nyuyi lives in the leaf litter of gallery forests in southeastern Senegal [1]. The type series was collected at 395m elevation in the Afia Forest near Dindefelo using Winkler extraction, a method that samples soil and litter arthropods [1]. A second sampling of the same site in 2018 found more workers, confirming the population persists there [2]. The species appears restricted to this single location [1].

Army Ant Biology Considerations

While specific behavior is unstudied for this species, Aenictus species are army ants that typically form large nomadic colonies [2]. They are specialized predators that require massive amounts of food and space to maintain their raiding behavior. Unlike typical ant colonies that stay in one nest, army ants frequently relocate, making them unsuitable for standard formicaria [2].

Frequently Asked Questions

Can I keep Aenictus nyuyi in a test tube?

No. Only workers are known for this species, so you cannot start a colony. Even if you had a colony, army ants require specialized setups, not test tubes [1].

How long until Aenictus nyuyi gets its first workers?

Unknown. No queens have been found, so founding behavior and development time are unconfirmed [1].

What do Aenictus nyuyi eat?

Likely small arthropods and other ants based on typical Aenictus behavior, but specific diet is unstudied [2].

Where can I buy an Aenictus nyuyi colony?

You cannot. This species is known only from scientific collections in Senegal and is not available in the ant trade [1].

How big do Aenictus nyuyi colonies get?

Unknown. Only ten workers have ever been collected [1].

Are Aenictus nyuyi good for beginners?

No. This is not a species for keeping due to lack of knowledge about their biology and reproductive strategies [1].

Do Aenictus nyuyi need hibernation?

No. They come from tropical Senegal and do not require winter rest [2].

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References

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This caresheet is licensed under CC BY-SA 4.0 .