Myrmica angulata

Quick Summary

• Difficulty: Medium
• Origin & Habitat: Southern China (Guangxi Province,500-1000m elevation) and northern Vietnam (mixed forests at 1700-2200m elevation). In China, nests are found in rotten wood in forests. In Vietnam, they nest in rotten wood, in soil under logs and bark, or under stones ^[4]. The altitude difference between populations reflects regional climate differences, higher latitudes or elevations are cooler, allowing the same species to thrive at different elevations.
• Colony Type: Colony structure is unconfirmed, no specific data on queen number for this species.
• Size & Growth:
  • Queen: ~6-8mm total length, inferred from Myrmica genus ^[4]
  • Worker: ~4-6mm total length, inferred from Myrmica genus ^[4]
  • Colony: Unknown for this specific species
  • Growth: Moderate
  • Development: Development time is unconfirmed for this species (No specific development data available for M. angulata)
• Antkeeping:
  • Temperature: Keep at 20-24°C. This species comes from cool high-altitude forests (500-2200m), so avoid overheating. Room temperature or slight heating on one side of the nest works well. Monitor colony activity, if they avoid heated areas, reduce temperature.
  • Humidity: High humidity required, they naturally live in damp forest environments. Keep nest substrate consistently moist but not waterlogged. Provide a water tube for drinking water. Mist the outworld occasionally but avoid constant dampness that promotes mold.
  • Diapause: Yes, Myrmica species require a winter dormancy period. Reduce temperature to 5-10°C for 3-4 months (roughly October-March in the Northern Hemisphere). Do not feed during diapause but ensure water is available.
  • Nesting: Prefers naturalistic setups that mimic their natural nesting in rotten wood, soil under logs, or under stones. Y-tong (AAC) nests with moist substrate work well. They also do well in test tube setups with damp cotton. Provide a gradient of humidity within the nest.
• Behavior: Workers are moderately active and forage for food both in the nest area and outworld. Like most Myrmica, they have a functional stinger but are not particularly aggressive toward keepers, they will sting if handled roughly or when defending the nest. Escape risk is moderate due to their small size, use standard barrier methods (Fluon on container edges). They are not known for being particularly timid or bold, typical Myrmica foraging behavior.
• Common Issues: high-altitude species is sensitive to overheating, keep below 25°C, colonies may struggle if humidity drops too low, monitor substrate moisture, diapause is essential for long-term colony health, skipping hibernation weakens colonies over time, small colony size means slow growth, beginners may lose patience and overfeed, wild-caught colonies may have parasites that cause problems in captivity

Housing and Nest Setup

Myrmica angulata does well in several nest types. A Y-tong (AAC) formicarium with moist substrate mimics their natural rotting wood habitat and allows you to observe the colony easily. Test tube setups work well for founding colonies and small colonies, simply keep the cotton damp and provide a separate feeding area. Because they come from high-altitude forests, they need protection from heat. Place the nest in a cool area of your room, away from direct sunlight and heating sources. A small water tube attached to the nest provides drinking water. For the outworld, a simple plastic container with Fluon on the upper edges prevents escapes. These ants are small but not extreme escape artists, standard barriers are sufficient. ^[4][3]

Feeding and Diet

Myrmica angulata is a typical omnivorous Myrmica, they accept both protein and sugar sources. Offer protein foods like small insects (fruit flies, small mealworms, crickets) and sugar sources like honey water or sugar water. In the wild, they likely forage for small invertebrates and tend aphids for honeydew. Feed protein 2-3 times per week for growing colonies, and keep a sugar source available at all times. Remove uneaten prey after 24-48 hours to prevent mold. For founding colonies, offer tiny food items, a single fruit fly or small cricket piece is enough. As the colony grows, increase food portions accordingly. ^[3]

Temperature and Seasonal Care

This species requires cool to moderate temperatures. Keep the nest area between 20-24°C, with room temperature typically being suitable. The key is avoiding overheating, temperatures above 25-27°C can stress or kill colonies. In winter, provide a diapause (hibernation) period of 3-4 months at 5-10°C. This can be done in a garage, basement, or refrigerator (not freezer). During diapause, the colony will be mostly inactive, do not feed them, but ensure water is available by using a moist substrate that won't freeze. Resume normal feeding and warming gradually in spring. Skipping diapause weakens colonies over time and can shorten the queen's lifespan. ^[3]

Growth and Development

Myrmica angulata colonies start small. A newly mated queen will lay eggs after sealing herself in a chamber. The first workers are typically smaller than normal workers and emerge after some weeks under warm conditions. There is no specific data on maximum colony size for this species. Growth rate is moderate, don't expect rapid expansion. Patience is key, especially in the first year. The queen can live for many years, with colonies potentially lasting a decade or more with proper care. ^[3]

Behavior and Handling

Myrmica angulata workers are moderately active and will explore their outworld in search of food. They are not particularly aggressive but will defend their nest if threatened. Like most Myrmica, they have a functional stinger, while small, it can penetrate human skin and causes mild pain. Handle them gently and avoid provoking defensive responses. When you open the nest for feeding or observation, tap gently first to warn them. They use chemical communication like all ants, you may notice workers antennating (touching each other with antennae) to communicate. They are not known for unusual behaviors like slave-making or tandem running, typical Myrmica all around. ^[3]

Frequently Asked Questions

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References