Myrmica ritae

Myrmica ritae

Myrmica ritae is a small to medium-sized Myrmica ant species native to Central and Southeast Asia, including Myanmar, Thailand, Nepal, India (Sikkim), and southern China. Workers have the typical Myrmica red-brown coloration with a smooth and shiny body, and can be identified by their unusually long propodeal spines, long and low petiole, and notably long antennal scapes that curve gently at the base ^[1]. This species belongs to the ritae species-group, one of the oldest lineages within the genus Myrmica, and shows morphological features that have been fairly well conserved since the Eocene period ^[1]. Queens have been described in taxonomic revisions, though males remain unknown ^[1].

What makes M. ritae particularly interesting is its high-altitude mountain habitat preference. Specimens have been collected from dense old oak forest at elevations around 1950m in Thailand, and similar altitudes in Nepal (Ulleri,2000m), where the climate is cool year-round ^[2]. This preference for cooler, mountainous environments sets it apart from many lowland tropical ant species and makes it one of the more temperate-adapted Myrmica species found in the Oriental region.

Quick Summary

• Difficulty: Medium
• Origin & Habitat: Native to Central and Southeast Asia including Myanmar, Thailand, Nepal, India (Sikkim), and southern China (Yunnan). Found in high-altitude cool broadleaf oak forest at elevations around 1950-2000m, typically nesting in rotting wood on the forest floor ^[2][1][3].
• Colony Type: Colony structure is not well documented. Based on typical Myrmica patterns, likely single-queen (monogyne) colonies, though this requires confirmation for this specific species.
  • Colony: Monogyne
  • Founding: Claustral
• Size & Growth:
  • Queen: Estimated 7-9mm based on genus patterns for ritae-group species
  • Worker: Estimated 4-6mm based on genus patterns
  • Colony: Likely moderate, similar to other Myrmica species, possibly several hundred workers at maturity
  • Growth: Moderate, Myrmica species typically grow at moderate speed
  • Development: Estimated 6-10 weeks based on typical Myrmica development at optimal temperature (Development time is estimated from genus-level data, specific timing for M. ritae has not been directly studied. Cooler mountain habitat may slightly extend development timeline.)
• Antkeeping:
  • Temperature: Keep at 18-22°C. This species prefers cooler conditions reflecting its high-altitude oak forest habitat. Room temperature or slight cooling is appropriate, avoid warm conditions. A gentle temperature gradient allows workers to choose their preferred zone.
  • Humidity: Moderate to high humidity (60-80%). The natural habitat is damp forest floor with rotting wood. Keep the nest substrate consistently moist but not waterlogged, with some drier areas available for the ants to self-regulate.
  • Diapause: Yes, Myrmica species require a winter hibernation period. Provide a diapause at 5-10°C for 3-4 months during winter months, simulating the cool high-altitude conditions they experience in their natural mountain habitat.
  • Nesting: In captivity, Y-tong (AAC) nests or plaster nests work well. This species naturally nests in rotting wood fragments on the forest floor, so provide nest materials that can retain moisture. Test tube setups are also suitable for founding colonies. Avoid dry, desert-style setups.
• Behavior: Workers are moderately active and typically non-aggressive toward keepers. Like other Myrmica species, they have a functional stinger but rarely use it unless directly threatened. They are foragers that search for protein and sugar sources. Escape risk is moderate, standard barrier methods (Fluon) work well. Workers are not particularly large but are not tiny enough to require fine mesh beyond standard antkeeping practices.
• Common Issues: Cool temperature requirements can be challenging in warm climates, may need cooling in summer months, High-altitude origin means this species may not tolerate prolonged heat exposure, Colony growth is moderate, keepers should be patient and not overfeed, Wild-caught colonies may carry parasites, quarantine and monitor new colonies, Rotting wood nesting preference means nest materials must be kept appropriately moist

Nest Preferences and Housing

Myrmica ritae naturally nests in rotting wood fragments on the forest floor, as evidenced by specimens found in a 15cm diameter piece of wood at 1950m elevation in Thailand ^[2]. In captivity, Y-tong (AAC) nests or plaster nests work well because they can maintain the moisture levels this species requires. Test tube setups are suitable for founding colonies, the queen will seal herself into a suitable chamber. Avoid dry formicarium setups like sand-only nests. The nest should have chambers sized appropriately for a moderate-sized colony. Provide a water tube or moisture reservoir to maintain humidity. Outworld space should allow workers to forage and dispose of waste.

Feeding and Diet

Like other Myrmica species, M. ritae is omnivorous with a preference for protein sources. Feed a varied diet including small insects (fruit flies, pinhead crickets, mealworms), and sugar sources (honey water, sugar water). In the wild, they forage for small arthropods and likely tend aphids for honeydew. Offer protein 2-3 times per week and keep a sugar source constantly available. Remove uneaten prey after 24-48 hours to prevent mold. Fresh water should always be available.

Temperature and Seasonal Care

This is the most critical aspect of keeping M. ritae successfully. As a high-altitude mountain species from cool oak forest, it requires cooler temperatures than most tropical ants, aim for 18-22°C consistently. They can tolerate brief periods slightly outside this range but prolonged heat is harmful. In warm climates, consider positioning the colony away from direct sunlight or use a small fan for air circulation. During winter (roughly November-February in temperate regions), provide a proper hibernation at 5-10°C for 3-4 months. This dormancy period is essential for colony health and queen longevity, mimicking the cold mountain winters they experience in their natural habitat. ^[2]

Behavior and Colony Dynamics

Myrmica ritae workers are active foragers with typical Myrmica behavior, they search methodically for food and communicate discoveries to nestmates. They are not particularly aggressive but will defend the nest if threatened. Like all Myrmica, they possess a stinger and can deliver a mild sting if handled roughly or if the colony feels endangered. Colonies grow at a moderate pace, expect 6-12 months from founding to first significant worker batches. Mature colonies may reach several hundred workers. The queen has a reasonably long lifespan for a Myrmica, potentially living several years with proper care.

Frequently Asked Questions

References