Temnothorax kutteri

Temnothorax kutteri

Temnothorax kutteri is a small, pale yellowish ant measuring 2.4-3.4mm for workers and 3.4-3.7mm for queens ^[1]. Originally described as Temnothorax kutteri, this species was reclassified into the genus Temnothorax in 2014 based on phylogenetic analysis ^[2]. The workers have a distinctive sharp tooth under their post-petiole (the segment connecting their abdomen to their body) and a smooth, shiny head with sparse body hairs ^[1][3]. They inhabit the Mediterranean region of France and Spain, typically nesting under flat stones or in rock fissures in woodland clearings ^[1][3].

This species is a slave-making ant, it invades nests of other Temnothorax species, kills or replaces the host queen, and uses the host workers to raise its own brood ^[1][3]. The parasite workers participate in nest tasks alongside hosts, including feeding and moving larvae, though they remain aggressive toward their hosts ^[3]. Natural colonies are small, with typically fewer than 20 parasite workers but up to 250 host workers ^[3]. This parasitic lifestyle makes them one of the more challenging Temnothorax species to keep, as they require a host colony to survive.

Quick Summary

• Difficulty: Expert
• Origin & Habitat: Mediterranean France and Spain, primarily the Iberian Peninsula. Found under stones or moss in cleared oak (Quercus) and pine (Pinus halepensis) woodlands, from coastal areas to elevations around 1650m ^[3][4]. Also inhabits wet inland woods in southern Spain under moss ^[3].
• Colony Type: Monogyne, single queen colonies. Obligate slave-maker requiring a host Temnothorax colony to survive. Queen is always absent from mixed colonies as the parasite queen replaces the host queen ^[1][5].
  • Colony: Monogyne
  • Queen: Socially parasitic, Temporary parasitic
  • Special: Slave-making
• Size & Growth:
  • Queen: 3.4-3.7mm ^[1]
  • Worker: 2.4-3.4mm ^[1]
  • Colony: Up to 20 parasite workers in natural colonies, host colonies can reach 250 workers ^[3]
  • Growth: Slow, inferred from small colony sizes and parasitic lifestyle
  • Development: Unknown, no direct studies on development time (Development is unconfirmed but likely follows typical Temnothorax patterns of 6-10 weeks at warm temperatures. The parasitic lifestyle may affect development timelines.)
• Antkeeping:
  • Temperature: Mediterranean species, keep at 20-24°C. Based on typical Mediterranean Temnothorax preferences and habitat data from France and Spain ^[3].
  • Humidity: Moderate, they nest under stones and moss in areas with varying moisture. Keep substrate slightly moist but not waterlogged. Provide a humidity gradient ^[3].
  • Diapause: Likely yes, Mediterranean species probably require a cool period in winter. Specific requirements unconfirmed.
  • Nesting: Naturalistic setup with flat stones, rock fissures, or cork bark works best. They nest in small cavities under stones in exposed locations. A Y-tong or acrylic nest with narrow chambers scaled to their tiny size is suitable ^[1][3].
• Behavior: Slave-making species, aggressive toward host colonies during raids but otherwise relatively docile toward humans. Workers are small and not particularly defensive. They conduct raids to steal host brood and integrate host workers into their colony ^[1][3]. Escape risk is moderate due to small size, use standard barrier methods.
• Common Issues: requires live host colony to survive, parasite workers cannot found their own colony, very small colony sizes mean slow population growth, aggressive toward host species during raids, must maintain separate host colony, difficult to establish in captivity due to parasitic dependency, limited availability, rarely collected and difficult to culture

Understanding the Parasitic Lifestyle

Temnothorax kutteri is an obligate social parasite, it cannot survive without a host colony of another Temnothorax species. This is fundamentally different from most ants you might keep. The parasite queen invades a host nest, kills or replaces the host queen, and then uses the host workers to raise her own brood ^[1][3]. The host workers continue their normal tasks (foraging, caring for larvae, maintaining the nest) while the parasite workers coexist with them.

In mixed colonies, the parasite queen is always present while the host queen is absent, the parasite eliminates the host queen from the colony ^[1]. This is different from some other parasitic ants that temporarily use host workers. The parasite workers participate in nest tasks alongside hosts, including exchanging food and moving larvae, but they maintain their aggressive nature toward hosts ^[3]. Natural colonies typically contain only one parasite queen with fewer than 20 parasite workers but can have up to 250 host workers ^[3].

Host Species Requirements

Keeping T. kutteri requires maintaining at least one healthy host colony. In the wild, they parasitize multiple Temnothorax species. The most common host is Temnothorax racovitzai (formerly Temnothorax racovitzai), followed by T. specularis, T. recedens, T. rabaudi, T. unifasciatus, T. lichtensteini, T. platycephalus, and T. grouvellei ^[4][3].

For captive care, you would need to establish and maintain a host colony first. The host species should be collected from the same geographic region if possible, as there may be local adaptations. Host colonies can reach 250 workers in the wild ^[3], so plan accordingly. The host colony will do the majority of the work, foraging, brood care, nest maintenance, while the parasite colony depends on them.

Feeding and Nutrition

Both the parasite and host colonies need feeding. The host workers will forage for food and share it with parasite workers through trophallaxis (food exchange) ^[3]. Offer standard ant foods: sugar water or honey for energy, and small protein sources like fruit flies, pinhead crickets, or other tiny insects.

Because host workers do the foraging, you may see host workers collecting food while parasite workers remain in the nest or tend to larvae. This is normal behavior. The parasite workers are somewhat integrated into the host colony's social structure but retain aggressive tendencies toward hosts ^[3]. Feed the colony 2-3 times per week with fresh food, removing any uneaten prey after 24 hours.

Temperature and Seasonal Care

As a Mediterranean species from France and Spain, T. kutteri prefers temperatures in the 20-24°C range. They are found from coastal areas to elevations over 1600m, suggesting they can tolerate a range of conditions ^[4][6]. Keep them at room temperature (around 21-23°C) with some variation allowed.

Winter diapause is likely required, as with most Mediterranean Temnothorax species. Reduce temperatures to 10-15°C for 2-3 months during winter, mimicking natural seasonal cycles. The nuptial flights occur in June to July in the wild ^[7], so if you have a established colony, reproduction typically happens in summer. During hibernation, keep the colony slightly moist but not wet.

Nest Setup and Housing

T. kutteri naturally nests under flat stones, in rock fissures, and under moss in woodland clearings ^[1][3]. For captivity, a naturalistic setup works best, a terrarium with a soil substrate, flat stones on top for nesting, and some moss if available. Alternatively, a Y-tong or acrylic nest with small chambers scaled to their tiny 2-4mm size can work.

Because they are so small, escape prevention is important. Use fine mesh on any openings and consider barrier methods like fluon on test tube rims. The colony should have access to both a moist area (for the nest) and a dry area (for foraging). A small water tube for drinking water is also recommended.

Ethical and Legal Considerations

This is a specialized species that is rarely kept in captivity due to its parasitic requirements. Before attempting to keep T. kutteri, consider whether you can properly maintain both the parasite and host colonies long-term. In the wild, they are rare, found in only about 1% of ant colonies sampled in some studies ^[8].

Also check local regulations before collecting. They are protected in some areas of their range. Never release any ant colony into the wild, especially a parasitic species that could impact native Temnothorax populations. If you cannot commit to maintaining both colonies, consider a more straightforward ant species instead.

Frequently Asked Questions

References