Tetramorium kephalosi

Quick Summary

• Difficulty: Easy
• Origin & Habitat: Mediterranean region, found in all Greek provinces, Croatia, and other Balkan areas. Lives in dry, sunny open habitats including pastures, roadsides, luminous forests, and olive plantations, from sea coast up to 1090 m elevation ^[1][4][5].
• Colony Type: Facultatively polygynous, colonies can have a single queen (monogynous) or multiple queens (polygynous). One nest contained up to 7 queens ^[1][4].
• Size & Growth:
  • Queen: Size data unavailable (only head measurements exist in literature) ^[1]
  • Worker: Size data unavailable (only head measurements exist in literature) ^[1]
  • Colony: Unknown (not documented in research) ^[1]
  • Growth: Unknown (likely moderate based on genus patterns) ^[1]
  • Development: Unknown (not studied for this species) ^[1] (Development time has not been documented. Estimates from related species are unreliable.)
• Antkeeping:
  • Temperature: Keep at 22-26°C, they are thermophilous ants from the Mediterranean. Room temperature (20-24°C) works, but avoid extended periods below 15°C ^[5][1].
  • Humidity: Low to moderate, these ants prefer dry conditions. Allow the nest substrate to dry out between waterings, but keep a small damp area available for brood development ^[1][5].
  • Diapause: Unknown, diapause requirements are not documented for this species. As a Mediterranean species, they likely do not require true hibernation, but a brief cool period (15-18°C) may be optional ^[5].
  • Nesting: Nests in soil under stones in the wild. A Y-tong (AAC), plaster, or soil nest works well in captivity. Avoid constantly wet setups. Test tubes are suitable for founding colonies ^[1][5].
• Behavior: These ants are generally peaceful and not aggressive toward keepers. Workers are small and active foragers that hunt small insects and tend aphids for honeydew. Their primary defense is using a modified stinger to smear venom rather than pierce, stings are rare and harmless due to their tiny size. Escape risk is high due to their small size, use fluon or tight barriers. They are most active in warm months and may slow down in cooler conditions ^[1][5].
• Common Issues: very small size means escapes are likely without proper barriers, use fluon or tight-fitting lids, overly damp conditions can kill the colony, they prefer dry Mediterranean conditions, wild-caught colonies may carry parasites that can devastate a captive colony, confusion with similar species like Tetramorium semilaeve, ensure correct identification using male genitalia or worker details, multi-queen colonies may have initial queen aggression, introduce queens before egg-laying

Housing and Nest Setup

In the wild, Tetramorium kephalosi nests in soil under stones, often in sunny, open spots ^[1][5]. For captivity, a naturalistic setup with a soil layer and flat stone works well. For easier observation, use a Y-tong (AAC) or plaster nest. They prefer dry conditions, so avoid setups that stay constantly wet. A test tube setup works fine for founding, keep the water chamber moderate and let the cotton dry between refills. Because they are very small, ensure excellent escape prevention: use fluon on container rims and fine mesh on ventilation holes ^[1][5].

Feeding and Diet

Like most Tetramorium species, these ants are generalist feeders. Offer protein sources such as small insects (fruit flies, pinhead crickets, mealworms). Provide carbohydrates as sugar water, honey, or honeydew. They will also scavenge dead insects. For a founding colony, feed small amounts: a drop of honey and a tiny insect fragment every few days. As the colony grows, offer protein 2-3 times per week and keep sugar water available constantly. Their tiny size means prey should be appropriately small ^[1].

Temperature and Seasonal Care

Tetramorium kephalosi is thermophilous and prefers warm conditions around 22-26°C ^[5]. Room temperature (20-24°C) is suitable. A small heating cable on one side of the nest can create a gradient if needed. In their natural Mediterranean habitat, they experience mild winters. Diapause requirements are not documented, so a brief cool period (15-18°C for 2-3 months) is optional but may help synchronize seasonal activity. Avoid temperatures below 10°C ^[1][5].

Colony Structure and Queen Care

This species is facultatively polygynous: colonies can have one or multiple queens. In the wild, nests have been found with up to 7 queens ^[1][4]. Founding behavior is unconfirmed in the literature, but based on typical Myrmicinae patterns, the queen likely seals herself in a claustral chamber and raises the first workers using stored reserves. If keeping multiple queens, introduce them before egg-laying to reduce aggression. Once workers emerge, the colony grows steadily ^[1].

Growth and Development

Development time from egg to worker has not been studied for this species. Based on related Tetramorium species, the process may take 6-8 weeks under warm conditions, but this is speculative. The first workers (nanitics) are typically smaller than subsequent workers. Colony growth rate is not documented, expect slow to moderate growth until the colony reaches a stable size. Long-term colony size is unknown ^[1].

Identification and Similar Species

Tetramorium kephalosi was separated from Tetramorium semilaeve in 2017. Reliable identification requires examining male genitalia or detailed worker morphometrics. Workers of T. kephalosi have a slightly concave occipital margin and are usually darker (yellowish-brown to brown) than true T. semilaeve, which tends to be yellow. Related species like Tetramorium galaticum and Tetramorium bellerophoni are paler (yellow), while Tetramorium hippocrate is much darker (dark brown to black). If you obtained ants from the Balkans or Greece, they are almost certainly T. kephalosi rather than the true T. semilaeve, which is restricted to the western Mediterranean ^[1][2][8].

Frequently Asked Questions

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References