Simopone nonnihil

Quick Summary

• Difficulty: Expert
• Origin & Habitat: Madagascar, Toamasina region (Ambohidena), in littoral rainforest at about 20 m elevation. Collected from dead sticks above ground and low vegetation ^[1][2].
• Colony Type: Unconfirmed – no data exists on colony structure or number of queens for this species.
• Size & Growth:
  • Queen: Undescribed – queen caste has not been documented
  • Worker: Size data unavailable. Head length reported as 1.22–1.68 mm, but total body length has not been recorded ^[1].
  • Colony: Unknown – no colony size data available
  • Growth: Unknown
  • Development: Unknown – not documented (No direct measurements exist. Related Dorylinae species may take several months, but this is an estimate.)
• Antkeeping:
  • Temperature: Likely 22–26°C, based on tropical lowland rainforest habitat. Keep stable with a slight gradient.
  • Humidity: High – this species is documented as preferring humid conditions ^[3]. Keep the nest substrate consistently moist but avoid standing water.
  • Diapause: Unknown – Madagascar has a mild climate, so seasonal dormancy may not be required.
  • Nesting: Arboreal forager found in dead sticks and low vegetation. In captivity, use a plaster, Y‑tong, or natural cork bark setup with tight, narrow chambers scaled to their tiny size.
• Behavior: Cryptic, individual‑hunting predator. Not aggressive toward humans, but will defend the nest if disturbed. Escape risk is extreme because of their tiny size – use fine mesh on all openings. They forage alone and likely spend long periods motionless, waiting for prey.
• Common Issues: tiny size makes escape prevention critical – use fine mesh barriers., obligate predatory diet requires live prey (springtails, fruit flies), they will not accept sugar or dead food., high humidity needs – dry conditions can kill the colony quickly., colony growth is likely slow, and virtually no captive husbandry information exists – expect experimental care., live prey cultures must be maintained continuously.

Housing and Nest Setup

Simopone nonnihil is an arboreal forager found in dead sticks and low vegetation in Madagascar rainforests ^[2]. Provide a setup that mimics this: a plaster, Y‑tong, or natural cork bark nest with tight, narrow chambers scaled to the tiny workers. The nest must hold high humidity – this species is documented as preferring humid conditions ^[3]. Keep the substrate consistently moist but avoid standing water. Because the ants are very small, escape prevention is critical: use fine mesh on all openings and make sure connections between nest and outworld are snug.

Feeding and Diet

As a predatory cerapachyine ant, S. nonnihil almost certainly requires live small invertebrates as its primary food. In the wild, Simopone species are ambush predators that hunt small arthropods ^[2]. Offer tiny live prey such as springtails, fruit flies, and pinhead crickets every few days, removing uneaten remains to prevent mold. Sugar sources (honey, sugar water) are unlikely to be accepted – these are obligate predators. Be prepared to maintain cultures of feeder insects.

Temperature and Humidity

Keep temperatures in the 22–26°C range, mimicking Madagascar's warm rainforest climate. Provide a slight gradient so the ants can thermoregulate. Heating cables or mats can be placed on top of the nest, never underneath (to avoid drying out the substrate). Humidity is critical – collection data flag this species as humid‑loving ^[3]. Use a water reservoir or a moisture gradient, and avoid letting the nest dry out. Good ventilation will prevent mold while maintaining high humidity.

Behavior and Temperament

Simopone nonnihil is a cryptic, secretive ant that forages alone rather than in groups. It is not aggressive and poses no threat to humans – when disturbed it will flee instead of fight. As an ambush predator, it likely spends long periods motionless, waiting for prey. Much of its behavior has not been observed in captivity. Dorylinae ants usually have a functional stinger, but whether S. nonnihil stings is undocumented. If it can, the sting is negligible due to its small size. ^[1][2]

Acquiring and Establishing a Colony

This species is not available in the antkeeping hobby. No captive colonies have been reported. If you obtain a colony from wild collection, expect an experimental phase with no established methods. Start with a small test‑tube setup that holds high humidity, offer tiny live prey, and observe. Be ready to adjust humidity, prey types, and enclosure based on the colony’s response. Success would add valuable knowledge for the community. ^[2]

Frequently Asked Questions

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References