Temnothorax finzii

Quick Summary

• Difficulty: Medium
• Origin & Habitat: Southern Europe (Italy, North Macedonia, Bulgaria). Inhabit dry open habitats, nesting deep in soil under stones ^[4][3].
• Colony Type: Unconfirmed, likely single-queen (monogyne) based on typical Temnothorax patterns.
• Size & Growth:
  • Queen: 3.5-4mm ^[1]
  • Worker: 3-3.5mm ^[1]
  • Colony: Likely under 200 workers (inferred from recedens‑group size).
  • Growth: Moderate
  • Development: Estimated 6-10 weeks based on typical Temnothorax development. (Development time is inferred, specific data for this species is unavailable.)
• Antkeeping:
  • Temperature: Room temperature (20-24°C) suits this species. Avoid extremes above 28°C. Mediterranean origin suggests stable, moderate conditions ^[4].
  • Humidity: Moderate. Nest substrate should be slightly moist but not waterlogged, matches their natural dry habitat under stones ^[4].
  • Diapause: Likely required. Reduce to 10-15°C for 2-3 months in winter (typical for European Temnothorax).
  • Nesting: Y‑tong (AAC) or plaster nests with small chambers work well. A naturalistic setup with flat stones over soil mimics their natural nesting site ^[4].
• Behavior: Timid and non‑aggressive. As a member of Crematogastrini, Temnothorax finzii uses a modified spatulate stinger to smear venom onto enemies, they rarely sting and prefer to flee. Due to their tiny size (3mm), escape prevention is critical. They are harmless to keepers.
• Common Issues: tiny size makes escape likely without fine mesh or fluon barriers., rare species, limited care information and difficult to source., slow colony growth can frustrate beginners expecting fast results., winter diapause is essential, skipping it may weaken or kill the colony., small colony size means any losses have a larger impact.

Housing and Nest Preferences

Because workers are only 3mm long, Temnothorax finzii requires a nest with small chambers and tight passages ^[1]. Y‑tong (AAC) or plaster nests with chambers scaled to

Feeding and Diet

Like other small Myrmicinae, Temnothorax finzii likely eats insect prey (fruit flies, small crickets) and sugary liquids (honey water, sugar water). Offer small amounts 2-3 times per week and remove leftovers after 24 hours to prevent mold. There is no evidence they collect seeds, so stick to protein and sugar sources. The small worker size means even tiny prey items are substantial meals.

Temperature and Seasonal Care

Keep the colony at room temperature (20-24°C) during the active season. This Mediterranean species can tolerate slightly warmer conditions, but avoid sustained heat above 28°C ^[4]. Winter diapause is likely required, from November to February reduce temperatures to 10-15°C (a cool garage or basement works). Do not feed during diapause but keep the substrate slightly moist. Return to warm temperatures in spring to trigger normal activity and egg‑laying.

Behavior and Temperament

Temnothorax finzii is a timid, non‑aggressive species. Like other members of the tribe Crematogastrini, it has a modified stinger used to smear venom onto enemies rather than piercing. In practice, the ants prefer to flee from threats. They are harmless to humans. The biggest challenge is escape prevention, at 3mm they can squeeze through gaps under 1mm ^[1]. Use fluon on test tube rims, ensure all connections are tight, and cover ventilation with fine mesh.

Frequently Asked Questions

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References