Temnothorax cerastarum

Quick Summary

• Difficulty: Medium
• Origin & Habitat: Endemic to Cyprus, found only in mountain pine and cedar forests at high altitude (1138 m). The single known nest was discovered under a stone in Cedar Valley, Paphos ^[1][2].
• Colony Type: Likely monogyne (single-queen) based on typical Temnothorax patterns and the observation of one queen in the only known nest, but not confirmed for this species ^[1].
• Size & Growth:
  • Queen: Not directly recorded, estimated ~4-6 mm total length based on other Temnothorax species (genus inference).
  • Worker: Not directly recorded, estimated ~2-4 mm total length based on genus averages.
  • Colony: Unknown for this species, but typical Temnothorax colonies range from dozens to a few hundred workers.
  • Growth: Moderate, inferred from related Temnothorax species.
  • Development: Estimated 6-10 weeks at optimal temperature (based on typical Temnothorax development). (Development time is inferred from related species, specific data for T. cerastarum is not available.)
• Antkeeping:
  • Temperature: Likely 18-22°C based on its mountain origin (1138 m in Cyprus). Avoid temperatures above 25°C. Provide a slight gradient so ants can choose their preferred zone ^[1].
  • Humidity: Moderate humidity. Keep nest substrate damp but not waterlogged, consistent with a mountain forest habitat ^[1].
  • Diapause: Yes, likely required as a Mediterranean mountain species. Provide a hibernation period at 5-10°C for 2-3 months during winter.
  • Nesting: In nature, they nest under stones in forests. In captivity, use Y-tong (AAC), plaster, or test tube nests with tight, small chambers (3-4 mm high). A layer of damp soil or sand as substrate works well. Never use acrylic nests ^[1].
• Behavior: These ants belong to the Myrmicinae subfamily and Crematogastrini tribe, meaning their primary defense is a smearing venom from a modified stinger, not formic acid. Workers are active foragers that search for food individually. They are not particularly aggressive but will defend the nest vigorously. Due to their tiny size, escape prevention is critical, they can squeeze through very small gaps. They are likely diurnal and may use tandem running to communicate food sources (common in the genus).
• Common Issues: escape prevention is critical due to their very small size, they can squeeze through gaps that larger ants cannot, slow colony growth can frustrate beginners, these are not fast-growing ants, overheating is a serious risk, keep them well below 25°C, wild-caught colonies may have parasites or diseases that cause colony failure in captivity, dry conditions will kill colonies quickly, monitor humidity consistently

Housing and Nest Setup

Due to their tiny size, Temnothorax cerastarum needs a small-scale setup. Y-tong (AAC) nests work well because humidity can be controlled easily and chambers are appropriately sized. Plaster nests with water reservoirs also work, provided the plaster stays damp. For founding colonies, test tubes (15 mm or smaller diameter) with a water reservoir are ideal. The nest chambers should be no more than 3-4 mm high, as these ants prefer tight spaces. Avoid large, open formicaria that may stress the small workers. A naturalistic setup with a small container and flat stones on damp substrate mimics their natural habitat ^[1][3].

Feeding and Diet

Temnothorax cerastarum is omnivorous, like most Temnothorax species. Offer small live prey (fruit flies, pinhead crickets, small mealworms) for protein. They readily accept sugar water, honey, or diluted honey for carbohydrates. In the wild, they likely forage for honeydew from aphids and small insects. Feed small amounts 2-3 times per week, removing uneaten food after 24 hours to prevent mold. Once workers appear, provide a constant supply of sugar water. For founding colonies, offer tiny food items after the first workers emerge ^[3].

Temperature and Seasonal Care

This species prefers cooler temperatures than many commonly kept ants. Maintain the nest area at 18-22°C (room temperature often suffices). Avoid any temperatures above 25°C, which can be fatal. A heating cable on one side of the nest can create a gentle gradient (never place heat directly on the nest). During winter, provide a diapause period of 2-3 months at 5-10°C, this is important for colony health and likely triggers reproductive cycles. Place the colony in an unheated room or refrigerator. The mountain origin (1138 m in Cyprus) shows they are adapted to seasonal temperature variations ^[1][3].

Colony Development

Temnothorax cerastarum is a newly described species, so specific development times are not documented. Based on typical Temnothorax patterns, expect 6-10 weeks from egg to first worker (nanitics) at optimal temperature. The founding queen likely raises the first brood without foraging, as is common in claustral founding (though founding type is unconfirmed for this species). First workers (nanitics) are smaller than mature workers and help expand the colony. Growth is gradual, a mature colony of several hundred workers may take 2-3 years. Colony size at maturity is unknown but likely falls in the 100-300 worker range typical for the genus. Patience is essential ^[3].

Behavior and Observation

Workers are active foragers that search for food individually across the foraging area. They likely communicate through tandem running (a behavior common in the genus), though not confirmed for this species. Workers are not particularly aggressive toward humans but will vigorously defend the nest against intruders. Their primary defense is a smearing venom from a modified stinger, typical of the Crematogastrini tribe. Their small size makes them excellent escape artists, even tiny gaps result in escapes. Use fluon or similar barriers on the foraging area rim. They are likely diurnal, with peak activity during daylight hours. Observing these tiny ants is rewarding for patient keepers ^[3].

Frequently Asked Questions

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References