Temnothorax melas

Temnothorax melas

Temnothorax melas is a tiny ant species endemic to the island of Corsica in the Mediterranean. Workers are small at 2-4mm, with the characteristic dark coloration typical of the genus, usually dark brown to black with a slightly lighter mesosoma. The species was originally described as Temnothorax melas in 1984 before being moved to Temnothorax in 2003. It belongs to the sordidulus species-complex, a group of closely related ants that can be difficult to distinguish from each other ^[1][2].

This species is obligatorily monogyne, meaning each colony has exactly one queen. This is unusual because many Temnothorax species can switch between single-queen and multi-queen colonies, but T. melas is fixed with just one queen per colony ^[3]. They are an evening-swarming species, with reproductive ants taking flight during twilight hours ^[4]. As a Corsican endemic, these ants are adapted to the island's Mediterranean climate with warm, dry summers and mild, wet winters.

Quick Summary

• Difficulty: Easy
• Origin & Habitat: Corsica, France, endemic to this Mediterranean island. They inhabit the island's rocky, Mediterranean mountain habitats, typically nesting in rock crevices, under stones, or in decaying wood in warm, sheltered locations ^[1][2].
• Colony Type: Obligatorily monogyne, single queen colonies only. Each colony contains exactly one reproductive queen, with no multi-queen forms known ^[3].
  • Colony: Monogyne
  • Founding: Claustral
• Size & Growth:
  • Queen: Estimated 5-6mm based on genus typical sizes
  • Worker: 2-4mm based on genus descriptions ^[1]
  • Colony: Likely 50-200 workers at maturity, typical for small Mediterranean Temnothorax
  • Growth: Moderate, expect 6-10 weeks from egg to first worker at optimal temperature
  • Development: 6-10 weeks at optimal temperature (estimated from genus patterns) (Development time is typical for Mediterranean Temnothorax species. First workers (nanitics) will be smaller than mature workers.)
• Antkeeping:
  • Temperature: Keep at 20-24°C. They prefer warm conditions reflecting their Mediterranean origin. A heating cable on one side of the nest can create a gentle gradient if room temperature is below 20°C.
  • Humidity: Moderate humidity around 50-60%. These are not humidity-demanding ants, they come from relatively dry Mediterranean habitats. Allow the nest to dry out somewhat between water additions.
  • Diapause: Yes, provide a winter rest period of 8-12 weeks at 10-15°C. This mimics their natural seasonal cycle on Corsica where winters are cooler and wetter.
  • Nesting: Y-tong (AAC) nests work well for their small size. They also do well in naturalistic setups with flat stones or cork bark. Provide tight chambers scaled to their tiny workers.
• Behavior: Generally peaceful and non-aggressive. Like most Temnothorax, they are not territorial outside their nest and will avoid conflict when possible. Workers are active foragers that search for small prey and honeydew. Their tiny size (under 4mm) means they can escape through very small gaps, excellent escape prevention is essential. They are not known for stinging and pose no danger to keepers.
• Common Issues: escape prevention is critical due to their tiny size, they can squeeze through gaps that seem impossible, colonies are slow to establish initially, beginners may lose patience during the founding phase, winter diapause is required for long-term colony health, skipping hibernation weakens queens, test tube setups can flood if water reservoirs are too large for such small ants, wild-caught colonies from Corsica may carry parasites that can devastate captive colonies

Housing and Nest Setup

Temnothorax melas is a tiny ant, so your nest must have appropriately scaled chambers and tunnels. Y-tong (AAC) nests work excellently, the narrow chambers match their small size and the material provides good humidity control. Naturalistic setups with flat stones, slate, or cork bark also work well. These ants nest in rock crevices in the wild, so they prefer tight, enclosed spaces rather than open areas. A formicarium with chambers 3-5mm wide and 2-3mm tall is ideal. Always use excellent escape prevention, these ants can and will escape through gaps you didn't know existed. Apply fluon or use fine mesh on all openings ^[1].

Feeding and Diet

Like other Temnothorax species, T. melas is omnivorous. They readily accept small insects like fruit flies, pinhead crickets, and small mealworms. Sugar sources are important too, offer diluted honey, sugar water, or honeydew occasionally. In the wild, they forage for small prey and collect honeydew from aphids and scale insects. Feed small prey items 2-3 times per week for established colonies, and keep a sugar source available at all times. Remove uneaten prey after 24 hours to prevent mold. Because they are such small ants, prey items should be appropriately sized, nothing larger than their head ^[5].

Temperature and Seasonal Care

Keep your colony at 20-24°C for optimal development. They are from Mediterranean Corsica and prefer warm conditions. During summer, room temperature is often sufficient. In cooler climates, use a heating cable on one side of the nest to create a gentle gradient, never heat the entire nest uniformly. Winter is essential: provide 8-12 weeks of diapause at 10-15°C. This can be done in an unheated room, garage, or refrigerator (not freezer). Reduce feeding during this period and keep the nest slightly drier. Skipping diapause will weaken the queen and reduce colony lifespan. In spring and summer, they will be most active, this is when colony growth accelerates ^[3][4].

Colony Founding

The founding queen will seal herself in a small chamber, this is claustral founding, typical of Temnothorax. She relies entirely on her stored fat reserves and does not leave to forage. Expect 6-10 weeks before the first workers (nanitics) emerge. The queen may appear inactive during this time, do not disturb her. Once workers emerge, they will be very small and pale. The colony should not be fed until workers are actively foraging outside the founding chamber, usually 1-2 weeks after eclosion. Founding colonies are fragile, avoid vibrations, temperature swings, and excessive humidity changes. Do not combine multiple founding queens as this species is obligatorily monogyne ^[3].

Behavior and Temperament

Temnothorax melas is a peaceful species that poses no threat to keepers. Workers are small, dark, and active, they spend time foraging, caring for brood, and maintaining the nest. They are not aggressive and do not have functional stingers. Their main defense is fleeing or hiding when threatened. Unlike some ants, they do not form supercolonies or show territorial behavior. Workers communicate using chemical signals and will recruit nestmates to good food sources through tandem running, one worker leads another to food. They are most active during evening hours, matching their swarming time ^[4]. The biggest husbandry challenge is their tiny size making escape likely without proper barriers.

Frequently Asked Questions

References