Probolomyrmex greavesi

Quick Summary

• Difficulty: Expert
• Origin & Habitat: South-eastern Australia, including Australian Capital Territory and Queensland. Found in forested sites ranging from non-native pine plantations through dry sclerophyll to wet sclerophyll forest. Nests in soil under rocks ^[1][2].
• Colony Type: Unknown colony structure. No data on queen number or social structure.
• Size & Growth:
  • Queen: Size data unavailable, full body measurements not provided in research.
  • Worker: Size data unavailable, full body measurements not provided in research.
  • Colony: Unknown, only a handful of specimens have ever been collected ^[1].
  • Growth: Unknown, no captive breeding records available.
  • Development: Unknown, no development data exists for this species. (No captive colony development has been documented.)
• Antkeeping:
  • Temperature: No specific data. Based on their habitat in south-eastern Australia, moderate temperatures around 20-24°C might be suitable, but this is unconfirmed ^[1].
  • Humidity: No specific data. Nests in soil under rocks, so likely moderate moisture. Keep substrate moist but not waterlogged, with a gradient ^[1][2].
  • Diapause: Unknown, no seasonal data available for this species.
  • Nesting: Natural nesting is under rocks in soil. In captivity, a small test tube setup or miniature naturalistic setup with soil and cover would mimic conditions, but no specific protocols exist.
• Behavior: Completely blind and likely slow-moving, as typical for Proceratiinae. No aggression data exists. Escape risk is moderate due to small size, standard escape prevention is sufficient.
• Common Issues: extreme rarity makes obtaining a colony nearly impossible ^[1], no captive breeding records exist, all attempts are experimental, completely blind may struggle in artificial setups, founding behavior unconfirmed, making colony establishment uncertain, tiny size makes feeding appropriate prey items challenging

Discovery and Rarity

Probolomyrmex greavesi was first described by R.W. Taylor in 1965 based on specimens collected from Mt. Stromlo in the Australian Capital Territory and Greenmount in Queensland ^[1]. The species has been collected only a handful of times, making it one of the rarest Australian ant species ^[1][2]. The original collection at Mt. Stromlo was from under rocks in pine litter within a plantation of exotic Pinus radiata ^[2]. This extreme rarity means that virtually no captive husbandry information exists.

Morphology and Identification

Workers are eyeless and have a light ferruginous brown coloration ^[1]. The petiolar node is short and broad, and the subpetiolar process forms a rounded 90° angle anteriorly with a straight ventral margin ^[1]. These morphological details are important for identification but have no direct bearing on care.

Habitat and Nesting

In the wild, P. greavesi has been found in forested sites ranging from non-native pine plantations through dry sclerophyll to wet sclerophyll forest ^[1][2]. They nest in soil under rocks, which provides a stable microclimate ^[1]. This suggests they prefer moderate temperatures and consistent moisture.

Care Realities

There are no established care protocols for this species due to its rarity and lack of captive data. Any attempt to keep P. greavesi would be experimental, with no guidance on diet, development, or social structure ^[1]. Antkeepers should focus on species with documented husbandry instead.

Frequently Asked Questions

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References