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

Proceratium cavinodus

Non-Parasitic Queen No Gamergate
Sci. Name
Proceratium cavinodus
Tribe
Proceratiini
Subfamily
Proceratiinae
Author
de Andrade, 2003
Distribution
Found in 1 countries

Introduction

Proceratium cavinodus is a tiny ant species native to the Northern Territory of Australia. Workers measure 3.29 mm in total length, making it the smallest species in the stictum clade . The species is light brown in color and has a distinctive concave postpetiole, which gives it the name 'cavinodus' meaning 'concave node' . It has reduced eyes with only a single convex facet, suggesting adaptation to dark microhabitats . Nothing is known about the biology of this species in the wild. Based on related Proceratium species, it may be predatory on small invertebrates, but this is unconfirmed. Colonies are likely small and slow-growing, best suited for experienced antkeepers.

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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: Northern Territory, Australia, specifically near Tor Rock in an outcrop area [1]. The exact habitat type is unconfirmed, but Proceratium species typically inhabit cryptic microhabitats like soil or rotting wood.
  • Colony Type: Colony structure is unconfirmed. No data on queen number or social structure.
  • Size & Growth:
    • Queen: Unknown, no queen has been described
    • Worker: 3.29 mm total length [1]
    • Colony: Unknown, no data on colony size
    • Growth: Unknown, likely slow based on genus patterns
    • Development: Unknown, no direct observations. Based on genus patterns, estimated 3-6 months at optimal temperature. (Development is likely very slow compared to common ant species.)
  • Antkeeping:
    • Temperature: Unknown, based on tropical origin, aim for warm temperatures around 24-28°C with a gentle gradient.
    • Humidity: Unknown, keep substrate moderately moist but not waterlogged, based on genus patterns.
    • Diapause: Unknown, northern Australia has mild winters, so diapause may not be required. If kept in temperate climates, a cool period may be beneficial.
    • Nesting: Unknown, based on genus patterns, prefer dark, humid microhabitats with small chambers. Use moist substrate or tight chambers in a nest.
  • Behavior: Unknown, based on genus patterns, likely secretive, slow-moving, and non-aggressive. Escape prevention is critical due to tiny size.
  • Common Issues: no biological data exists, all care recommendations are estimates based on genus patterns, slow growth may require patience, tiny size makes escape prevention challenging, wild-caught colonies may have health issues, they may refuse food if conditions are not optimal

Appearance and Identification

Proceratium cavinodus workers are tiny at 3.29 mm total length, the smallest in the stictum clade [1]. They are light brown [1]. The postpetiole is concave in the center but slightly raised on the sides, a key diagnostic feature [1]. Eyes have a single convex facet below the head midline [1]. The head is longer than broad with subparallel sides, and mandibles have 3-4 denticles before the apical tooth [1].

Distribution and Habitat

This species is known only from the Northern Territory of Australia, collected near Tor Rock at 11.59°S,133.05°E [1]. The type specimen was from an outcrop area in June 1973 [1]. Natural habitat is unconfirmed, but Proceratium species typically nest in cryptic locations like soil or under stones.

Feeding and Diet

The diet of Proceratium cavinodus is unconfirmed. Based on genus patterns, it may prey on small invertebrates like springtails or mites. In captivity, offer small live prey such as springtails or fruit flies. Sugar sources may be accepted occasionally but are not primary.

Temperature and Care

Temperature needs are unconfirmed. Based on tropical origin, aim for warm conditions around 24-28°C with a gentle gradient. Keep humidity moderate with moist substrate. Provide a water source and avoid drafts or direct sunlight.

Nesting Preferences

Nesting preferences are unconfirmed. Based on genus patterns, prefer dark, humid microhabitats with small chambers. Use moist substrate or a nest with tight chambers scaled to their tiny size. Minimize disturbance.

Behavior and Temperament

Behavior is unconfirmed. Based on genus patterns, workers are likely secretive, slow-moving, and non-aggressive, foraging individually. Escape prevention is critical due to tiny size, use fine mesh and secure barriers.

Frequently Asked Questions

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

Unknown, no colonies have been documented. Based on genus patterns, estimated 3-6 months from founding to first workers. Be patient with this slow-growing species.

What do Proceratium cavinodus ants eat?

Diet is unconfirmed. Based on genus patterns, offer small live prey like springtails or fruit flies. Sugar water may be accepted occasionally.

Are Proceratium cavinodus good for beginners?

No, this is an expert-level species due to lack of biological data. Care recommendations are estimates based on genus patterns. Beginners should choose species with well-established care protocols.

Do Proceratium cavinodus ants sting?

Proceratium species have stingers but are not aggressive. Given their tiny size, stings would be imperceptible to humans. They likely flee from threats.

What temperature should I keep Proceratium cavinodus at?

Unknown, aim for warm temperatures around 24-28°C based on tropical origin. Use a gentle heat gradient.

How big do Proceratium cavinodus colonies get?

Colony size is unknown, no data exists. Based on genus patterns, colonies are likely small.

Can I keep multiple queens together?

Unconfirmed, no data on social structure. Based on genus patterns, single-queen colonies are likely. Do not combine queens without evidence.

Do Proceratium cavinodus need hibernation?

Unknown, northern Australia has mild winters, so diapause may not be required. In temperate climates, a cool period may be beneficial but is not confirmed.

What size escape prevention do I need?

Critical, these ants are tiny at 3.29 mm [1]. Use fine mesh (0.5 mm or smaller) and secure all connections to prevent escapes.

When should I move them to a formicarium?

Wait until the colony has active foraging and stable growth. Proceratium species prefer stability, so avoid unnecessary moves. A test tube setup connected to a foraging area may work for small colonies.

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References

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This caresheet is licensed under CC BY-SA 4.0 .