Scientific illustration of Nesomyrmex angulatus (Angulate Lonely ant) - showing key identification features including head, thorax, and gaster.

Angulate Lonely ant

Nesomyrmex angulatus

Non-Parasitic Queen No Gamergate
Sci. Name
Nesomyrmex angulatus
Tribe
Crematogastrini
Subfamily
Myrmicinae
Author
Mayr, 1862
Common Name
Angulate Lonely ant
Distribution
Found in 11 countries
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Introduction

Nesomyrmex angulatus is a small myrmicine ant native to arid regions across Africa, the Arabian Peninsula, and Madagascar. Workers measure 3.1-3.8 mm in total length with yellow to light brown coloration, often with a darker antennal club . Their most recognizable feature is the mesosoma, which forms a single uninterrupted flat surface without any metanotal groove . This species is primarily arboreal, found on tree trunks and lower vegetation, nesting in pre-existing cavities of dead wood . It is one of the most widespread Nesomyrmex species globally, occurring across most African countries, the Arabian Peninsula, and the Malagasy region .

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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: Native to arid regions across Africa, the Arabian Peninsula, and Madagascar. Inhabits tropical dry forests, coastal scrub, mangrove forests, savannah, and Acacia woodland [1]. Nests in pre-existing cavities of dead wood on tree trunks or lower vegetation, rarely on the ground [1][3].
  • Colony Type: Colony structure is unconfirmed. No specific research on queen number or social structure exists.
  • Size & Growth:
    • Queen: Size data unavailable, no measurements documented in research.
    • Worker: 3.1-3.8 mm total length [1].
    • Colony: Unknown, no colony size data available in research.
    • Growth: Unknown, development timeline has not been studied.
    • Development: Unknown, no direct data. Based on typical Myrmicinae patterns, estimate 6-10 weeks at warm temperatures. (Development likely temperature-dependent, no species-specific studies exist.)
  • Antkeeping:
    • Temperature: Based on arid origin, likely prefer warm conditions. Start around 24-28°C and observe colony activity. Provide a gentle temperature gradient.
    • Humidity: Arid-adapted species. Keep nesting area relatively dry with low-to-moderate humidity. Allow substrate to dry between water additions.
    • Diapause: Unknown, no research on overwintering requirements.
    • Nesting: Arboreal nester, use Y-tong or plaster nests with small chambers. Provide dead wood or cork bark sections. Nesting area should be elevated and dry.
  • Behavior: Relatively calm and non-aggressive. Workers climb vertical surfaces comfortably. Standard escape prevention is needed due to small size. Founding behavior is unstudied.
  • Common Issues: lack of documented care information requires starting with arid, warm conditions and adjusting based on colony response., colony structure unconfirmed, do not assume multi-queen capability., development timeline unknown means patience is needed during founding., no data on specific dietary preferences, offer varied diet and observe acceptance., hibernation requirements unknown, research does not confirm if diapause is needed.

Natural History and Distribution

Nesomyrmex angulatus is the most widespread species in its genus, found across most African countries, the Arabian Peninsula, and the Malagasy region [3]. It prefers arid environments like tropical dry forests, savannah, and Acacia woodland [1]. Colonies nest in pre-existing cavities of dead wood on tree trunks or lower vegetation, rarely on the ground [1][3]. In West Africa, they use cocoa pods on trees, and in Malawi, they occupy Swartzia pods [1].

Identification and Distinctive Features

Key identifying feature is the mesosomal dorsum forming a single flat surface without a metanotal groove [1][2]. Workers are 3.1-3.8 mm long, yellow to light brown, with propodeal spines that vary in length and curve upward [1]. The petiolar node is well-developed and variable in shape [1][3]. Distinguished from Nesomyrmex grisoni by lighter body color [1].

Housing and Nesting in Captivity

Use Y-tong or plaster nests with small chambers scaled to their size [1]. Add cork bark or dead wood to the outworld to mimic natural nesting. Keep the nesting area dry, as they are arid-adapted [1]. Provide climbing opportunities in the outworld. Standard test tube setups work for founding colonies, but move to formicarium as colony grows. Ensure tight-fitting lids to prevent escapes due to small size.

Feeding and Diet

No specific dietary studies exist. Offer sugar sources like honey water and protein from small insects like fruit flies or pinhead crickets [4]. Feed small amounts and adjust based on consumption. Remove uneaten prey to prevent mold.

Temperature and Seasonal Care

Prefer warm temperatures around 24-28°C, with a gentle gradient [1]. Diapause is unknown, if colony slows in winter, reduce feeding and slightly lower temperatures [1][5].

Colony Founding and Development

Founding behavior is unconfirmed. Based on typical Myrmicinae patterns, queens may seal themselves in (claustral) but this is not documented for this species. First workers likely emerge in 6-10 weeks at warm temperatures, but this is an estimate. Be patient and avoid disturbing the founding chamber.

Frequently Asked Questions

How long does it take for Nesomyrmex angulatus to raise their first workers?

No direct data exists. Based on typical Myrmicinae patterns, estimate 6-10 weeks from egg to worker at 24-28°C. Be patient during founding.

What size nest should I use for Nesomyrmex angulatus?

Use nests with small chambers for their 3-4 mm size. Y-tong or plaster nests work well. Add dead wood or cork bark to the outworld for natural behavior.

Do Nesomyrmex angulatus ants sting?

As Myrmicinae, they have a stinger, but their small size makes stings unlikely to penetrate human skin. They are not aggressive.

What do Nesomyrmex angulatus eat?

Specific preferences unstudied. Offer sugar water and small protein prey like fruit flies, adjusting based on acceptance.

Can I keep multiple queens together in one colony?

Colony structure is unconfirmed. No evidence of multi-queen colonies exists. Do not combine queens without documentation.

Do Nesomyrmex angulatus need hibernation or diapause?

Unknown. Their wide distribution suggests possible tolerance, but no specific guidance exists. Monitor colony activity and adjust conditions accordingly.

Are Nesomyrmex angulatus good for antkeeping beginners?

Rated Medium difficulty due to lack of detailed care information. Suitable for those comfortable with trial-and-error and small Myrmicinae species.

Where is Nesomyrmex angulatus found in the wild?

Across most Africa, the Arabian Peninsula, and Malagasy region. Inhabits arid environments like dry forests and savannah, nesting in dead wood on trees.

How big do Nesomyrmex angulatus colonies get?

Colony size is unknown, no research documents maximum size. Based on small worker size, colonies likely reach several hundred workers at most.

What makes Nesomyrmex angulatus different from other ants?

Distinctive flat mesosoma without a metanotal groove, arboreal nesting in dead wood, and wide geographic distribution across arid regions.

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References

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This caresheet is licensed under CC BY-SA 4.0 .