Polyrhachis shattucki

Quick Summary

• Difficulty: Hard
• Origin & Habitat: Endemic to Queensland, Australia. Known only from savannah woodland habitats where workers are nocturnal ground-foragers ^[1][2].
• Colony Type: Colony structure is unconfirmed. Only stray workers have been collected, no colony samples exist.
• Size & Growth:
  • Queen: ~9.22 mm ^[1]
  • Worker: 7.66-9.07 mm ^[1]
  • Colony: Unknown, only two collections of stray workers exist.
  • Growth: Unknown
  • Development: Unknown, no species-specific data available. (Development timeline is unconfirmed for this species.)
• Antkeeping:
  • Temperature: Keep warm, roughly 24-28°C, based on Australian origin. Provide a temperature gradient for self-regulation.
  • Humidity: Keep nest substrate consistently moist but not waterlogged.
  • Diapause: Unknown, Queensland species may not require true hibernation.
  • Nesting: Based on Polyrhachis patterns, likely nest in soil or under objects. Use a naturalistic setup with soil substrate or a Y-tong nest.
• Behavior: Nocturnal ground-foragers ^[2]. Likely docile. Medium-sized ants capable of climbing smooth surfaces, use standard escape prevention.
• Common Issues: extreme rarity makes acquisition difficult and colonies are unlikely to be available., no captive breeding data exists, making establishment uncertain., wild-caught colonies may carry parasites or diseases., nocturnal habits may require feeding in evening for best results., escape prevention needed due to medium size and climbing ability.

Appearance and Identification

Polyrhachis shattucki workers are large ants measuring 7.66-9.07 mm in total length. They are predominantly black with reddish-brown coloration on the mandibles, antennae, and legs ^[1]. The petiole has a pair of slender, subparallel spines, and the body surface is finely reticulate-punctate with short, silvery pubescence. Queens are similar but slightly larger at about 9.22 mm and have three ocelli and full thoracic structure including wings ^[1].

Natural History and Rarity

This is one of the rarest Australian Polyrhachis species, known only from two collections in Queensland. The type series was collected as nocturnal stray workers on the ground in savannah woodland ^[2][1]. The species was formally described in 2013 by Rudolf Kohout and belongs to the micans species-group, which typically nests in soil or under ground-level objects ^[2].

Housing and Nesting

No specific nesting data exists for this species. Based on Polyrhachis patterns, they likely nest in soil or under objects. Use a naturalistic setup with a soil substrate that holds moisture but drains well. Provide hiding spots like flat stones or bark. Alternatively, a Y-tong nest with narrow chambers can work. Ensure the nest area is dark and humid, with a drier outworld for foraging.

Feeding and Diet

Like most Polyrhachis species, these ants are omnivorous. Offer sugar sources (honey water, sugar water) constantly and protein prey (small insects like fruit flies) 2-3 times per week. Remove uneaten prey after 24-48 hours to prevent mold. Given their nocturnal habits, feed in the evening.

Temperature and Seasonal Care

As an Australian species from Queensland, maintain temperatures between 24-28°C during active seasons. Provide a heating cable on one side of the nest to create a gradient, allowing ants to self-regulate. Avoid sudden temperature drops. During cooler months, room temperature may be sufficient, but true hibernation is likely not required.

Colony Establishment Challenges

The biggest challenge is the species' extreme rarity, with only two wild collections documented ^[2][1]. If a founding queen is obtained, the founding process is unconfirmed. Expect a wait of several months for first workers, and colonies will likely grow slowly due to limited biological data.

Frequently Asked Questions

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References