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

Nylanderia pubens

Polygynous Non-Parasitic Queen No Gamergate
Sci. Name
Nylanderia pubens
Tribe
Lasiini
Subfamily
Formicinae
Author
Forel, 1893
Distribution
Found in 1 countries

Introduction

Nylanderia pubens is a small ant with workers measuring up to 2.9 mm in total length . Workers are brown to light brown and covered in dense pubescence, giving them a dull, shaggy appearance . They belong to the N. fulva species complex, and workers are nearly impossible to distinguish from N. fulva without examining males . This species is native to the Caribbean and possibly South America, living in lowland disturbed areas . It has been introduced to Florida, but populations there may have been extirpated . A notable trait is that adult workers, queens, and alates contain a substance in their abdomen that degrades RNA, making genetic studies challenging . Despite being closely related to the invasive N. fulva, N. pubens appears to have limited invasive potential and has not spread aggressively like its sister 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: Expert
  • Origin & Habitat: Native to the Caribbean region and possibly South America, found in lowland disturbed areas below 400 m elevation [1][3]. Introduced populations in Florida from the 1950s-1970s appear to have been extirpated [2].
  • Colony Type: Polygyne (multiple queens per colony) and unicolonial, multiple nests can cooperate without aggression between them [5].
  • Size & Growth:
    • Queen: Size data unavailable, no total length measurements in research context.
    • Worker: Up to 2.9 mm total length [1].
    • Colony: Up to several thousand workers [6].
    • Growth: Moderate
    • Development: Estimated 6-10 weeks based on related Nylanderia species [6]. (Development time is inferred from genus patterns. Faster in warmer conditions (24-28°C), slower at cooler temperatures.)
  • Antkeeping:
    • Temperature: Keep warm at 24-28°C, as they are tropical ants [6]. Use a heating cable to create a gradient.
    • Humidity: Keep nest substrate consistently moist but not waterlogged, reflecting their lowland habitat [1].
    • Diapause: No, tropical species do not require winter dormancy [5].
    • Nesting: Use Y-tong, plaster, or soil nests, avoid acrylic nests. Provide a humidity gradient with a moist area.
  • Behavior: Active foragers with erratic 'crazy ant' movement patterns [7]. Omnivorous, feeding on honeydew, extrafloral nectar, and small insects [7]. Not aggressive toward humans but escape risk is high due to small size, use fine mesh barriers. Colonies are polygyne, which supports rapid growth [5].
  • Common Issues: escape prevention is critical due to small worker size, use fine mesh and tight barriers., temperature sensitivity, keep warm year-round to avoid colony decline., large colony size requires adequate space in the formicarium., warning: nylanderia pubens is an invasive species in the caribbean and has been introduced to florida. it is not recommended to keep this species in countries where it is not native. if kept, extreme precautions must be taken to prevent any escape.

Unique Biology: RNA Degradation

Adult workers, queens, and alates of N. pubens contain a substance in their terminal abdominal segments that rapidly degrades RNA [4]. This makes extracting intact genetic material from adults challenging, researchers must use head or thorax tissue for molecular studies [4]. This is a normal biochemical process and does not harm the ants. If you need to preserve specimens for genetic analysis, be aware of this trait.

Identification and Invasive Potential

Workers of N. pubens are indistinguishable from N. fulva without examining males [2][1]. Male genitalia differences are key for identification [8]. Despite being closely related to the invasive N. fulva, N. pubens has limited invasive capabilities and has not spread aggressively [2]. Populations attributed to N. pubens in the Caribbean and Florida may actually be N. fulva [2].

Frequently Asked Questions

How long does it take for Nylanderia pubens to produce first workers?

Expect first workers in approximately 6-10 weeks after founding, depending on temperature. This estimate is based on related Nylanderia species [6].

Can I keep multiple Nylanderia pubens queens together?

Yes, this is normal for the species. N. pubens is polygyne and unicolonial, meaning queens coexist peacefully [5]. You can keep multiple foundresses together or add queens to an existing colony.

What do Nylanderia pubens eat?

They are omnivorous. Feed sugar water, honey, or maple syrup for energy, and small insects like fruit flies for protein [7]. Remove uneaten food to prevent mold.

Are Nylanderia pubens good for beginners?

No, they are expert-level due to their invasive status, small size requiring escape prevention, and need for warm conditions. Not recommended for beginners.

What temperature do Nylanderia pubens need?

Keep them at 24-28°C, as they are tropical ants [6]. Use a heating cable if room temperature is below 24°C.

Why are my Nylanderia pubens dying?

Common causes include cool temperatures (below 20°C), dry conditions, escapes due to small size, or mold from overfeeding. Check temperature, humidity, and barrier integrity [9].

Do Nylanderia pubens need hibernation?

No, they do not require hibernation as a tropical species [5]. Maintain warm temperatures year-round.

When should I move Nylanderia pubens to a formicarium?

Move them when the test tube is crowded or the colony has around 50-100 workers. Ensure the formicarium has fine mesh barriers for their small size [9].

How big do Nylanderia pubens colonies get?

Colonies can reach several thousand workers [6]. Provide expanding space as the colony grows.

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References

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This caresheet is licensed under CC BY-SA 4.0 .