Myopias tenuis

Myopias tenuis

Myopias tenuis is a tiny predatory ant species from the Ponerinae subfamily, found across Papua New Guinea and northern Queensland, Australia. Workers measure just 2.8-4.1mm, making them one of the smallest Myopias species. They have a distinctive median clypeal lobe that is as long as or slightly longer than wide, and their antennae just reach the back of the head when laid straight back. The body is smooth and shiny, typically reddish to yellowish brown. These ants are specialized predators that hunt Entomobryid springtails, carrying them beneath their body army-ant fashion. Colonies are small, typically containing around 15 workers, and may have either a single queen or multiple queens ^[1].

Quick Summary

• Difficulty: Hard
• Origin & Habitat: Papua New Guinea and northern Queensland, Australia, lowland and hill rainforest habitats, typically nesting in rotten wood, under bark, and in leaf litter.
• Colony Type: Small colonies of about 15 workers. Can be single-queen (monogyne) or multi-queen (polygyne) ^[1].
  • Colony: Optionally polygyne
• Size & Growth:
  • Queen: Unconfirmed measurements, estimated similar to other Myopias species at 5-7mm
  • Worker: 2.8-4.1mm depending on population, PNG samples smaller (2.8-3.7mm), Australian samples larger (up to 4.1mm)
  • Colony: Approximately 15 workers in wild colonies ^[1]
  • Growth: Slow, small colony size and specialized diet suggest gradual growth
  • Development: Unknown, likely 8-12 weeks based on typical Ponerinae development at tropical temperatures (No specific development data available for this species. Related Myopias species suggest slower development than many ants due to small colony size and specialized predatory lifestyle.)
• Antkeeping:
  • Temperature: Keep at 24-28°C, these are tropical rainforest ants requiring warm, stable conditions. A heating cable on one side of the nest creates a suitable gradient.
  • Humidity: High humidity required, aim for 70-85%. Keep the nest substrate consistently moist but not waterlogged. These ants live in rainforest leaf litter and rotting wood in the wild, so they need damp conditions.
  • Diapause: No, as a tropical species from Papua New Guinea and northern Queensland, they do not require hibernation. Keep them warm year-round.
  • Nesting: Use a naturalistic setup with moist substrate (soil/peat mix) or a Y-tong/plaster nest with high humidity. They naturally nest in rotten wood and under stones in leaf litter. Provide plenty of hiding spots and hunting areas.
• Behavior: These ants are specialized predators with a unique hunting strategy, they carry springtails beneath their body like army ants. Workers are active hunters and will chase down prey. They are not aggressive toward humans and likely cannot sting effectively due to their tiny size. Escape prevention is critical, they are very small and can squeeze through standard mesh. Use fine mesh barriers and tight-fitting lids.
• Common Issues: tiny size means escapes are likely without fine mesh barriers, specialized diet on live springtails makes feeding challenging, cultures may crash, small colony size means any losses have bigger impact, handle gently, high humidity needs can lead to mold if ventilation is poor, slow growth tests keeper patience, resist overfeeding

Housing and Nest Setup

Myopias tenuis requires a setup that mimics their natural rainforest floor habitat. A naturalistic terrarium-style setup works best, use a moist soil/peat mixture as substrate, add leaf litter, small pieces of rotting wood, and stones for hiding places. Alternatively, a Y-tong or plaster nest with high humidity chambers can work well. The key is maintaining consistently damp substrate without flooding. Provide a water source via a test tube with cotton, they will drink from the meniscus. Because they are tiny, even small gaps can lead to escapes. Use fine mesh (0.5mm or smaller) on any ventilation holes and ensure all edges are sealed. A small outworld for feeding is fine, but keep it simple as these ants don't travel far from their nest. ^[1]

Feeding and Diet

This is the most challenging aspect of keeping Myopias tenuis. They are specialized predators on Entomobryid springtails, tiny, primitive insects that live in soil and leaf litter^[2]. In captivity, you must maintain a live springtail culture to feed them. Other small live prey may be accepted experimentally, such as booklice (psocids), tiny mites, or fruit fly larvae, but springtails should be the primary food. Do not rely on sugar sources, these are strict predators. Feed small amounts of prey every few days, removing any uneaten prey after 24 hours to prevent mold. The hunting behavior is fascinating to watch, workers will chase down and subdue springtails, then carry them back to the nest.

Temperature and Humidity Control

As tropical rainforest ants from Papua New Guinea and northern Queensland, Myopias tenuis needs warm and humid conditions year-round. Maintain temperatures between 24-28°C, use a heating cable on one side of the nest to create a gentle gradient if your room temperature is below this range. Place the heating on top of the nest, not underneath, to avoid drying out the substrate. Humidity should be high, around 70-85%. The substrate should feel consistently moist but never waterlogged. Mist the setup occasionally, but rely on damp substrate rather than frequent misting to avoid sudden fluctuations. Good ventilation is essential to prevent mold, but avoid strong airflow that dries things out.

Colony Structure and Behavior

Myopias tenuis forms small colonies of approximately 15 workers, with either a single queen or multiple queens ^[1]. This is unusual among ants, many species are either strictly single-queen or multi-queen, but this species can do both. Workers are active hunters that search for springtails in the leaf litter layer. Their hunting method is distinctive, they carry captured springtails beneath their body, similar to army ants carrying prey. Workers are not aggressive and likely cannot sting effectively due to their tiny size. The small colony size means each worker is valuable, avoid disturbing the colony unnecessarily and handle gently during any nest maintenance.

Frequently Asked Questions

References