Tetramorium jordani

Quick Summary

• Difficulty: Easy
• Origin & Habitat: Arid regions of South Africa (Western Cape and Northern Cape) and Namibia. Found in Succulent Karoo, Namib Desert, Lowland Fynbos and Renosterveld, Montane Fynbos and Renosterveld, and Nama Karoo habitats ^[1][3].
• Colony Type: Colony structure is unconfirmed. Based on typical Tetramorium patterns, likely monogyne (single queen) colonies.
• Size & Growth:
  • Queen: size data unavailable
  • Worker: 5.3–5.8mm total length ^[2]
  • Colony: Unknown – no colony size data available ^[1][3]
  • Growth: Moderate – inferred from typical Tetramorium development
  • Development: Estimated 6–8 weeks based on typical Tetramorium genus patterns (Development timeline not directly studied for this species. Estimate based on related seed harvester ants.)
• Antkeeping:
  • Temperature: Keep warm, between 22–26°C. As an arid-adapted species from southern Africa, they prefer stable warmth with a mild gradient.
  • Humidity: Low to moderate. Keep nest substrate dry to slightly moist but never wet. These are arid-adapted ants that nest in sandy soils. Provide a water source in the outworld but avoid wetting the nest substrate ^[1][3].
  • Diapause: Not required. This species originates from subtropical/tropical arid regions and does not experience true hibernation. Maintain active temperatures year-round.
  • Nesting: Sandy soil nests with tunnel systems. In captivity, use a sandy soil mix (70% sand,30% clay) or Ytong nest with sand-filled chambers. Provide substrate that allows tunnelling ^[1][3].
• Behavior: Peaceful seed harvester. Workers forage actively during warm periods. Not aggressive toward keepers. Medium size (5–6mm) makes containment easy with standard barriers. They are diurnal foragers, most active when temperatures are warmest.
• Common Issues: dry substrate is essential – too much moisture causes mold and colony stress, as a seed harvester, they need a varied seed diet alongside protein, colonies may be slow to establish initially – patience is key

Housing and Nest Setup

Tetramorium jordani nests naturally in sandy soils, constructing tunnels with crust-like walls to prevent sand collapse ^[1][3]. In captivity, provide a nest with sandy substrate or a Ytong/plaster nest with sand-filled chambers. The key is using a sandy, well-draining mix that holds its shape when tunnels are dug. A naturalistic setup with a sand-soil mixture works best – aim for about 70% sand and 30% clay/soil binder. The outworld should include areas for seed storage and foraging. Use a water tube for humidity, but avoid wetting the nest substrate excessively.

Feeding and Diet

T. jordani is a confirmed seed harvester – seeds make up their primary diet in the wild ^[1][3]. In captivity, offer a variety of small seeds suitable for their size. Grass seeds, millet, and commercial ant seed mixes work well. They also accept protein sources like small insects (fruit flies, small mealworms, crickets) and can be offered honey or sugar water occasionally. Provide seeds constantly in the outworld, and protein 2–3 times per week. Remove uneaten seeds periodically to prevent mold.

Temperature and Seasonal Care

As an arid-adapted species from southern Africa, T. jordani prefers warmer temperatures. Keep the nest area at 22–26°C, with a slight gradient allowing workers to choose their preferred temperature. A heating cable on one side of the nest can help maintain warmth, but always provide unheated areas for escape from heat. During winter, a slight reduction to room temperature (around 18–20°C) is acceptable, but true hibernation is not required. Avoid temperatures below 15°C. These ants are active year-round in captivity when kept warm.

Colony Establishment

Since colony structure and founding behavior have not been directly documented for this species, follow general Tetramorium guidelines. If the queen is claustral (which is typical but not confirmed), she will seal herself in a chamber and live off stored fat until her first workers (nanitics) emerge. Provide the founding queen with a small chamber filled with damp sand in a dark, quiet place. Once workers emerge, they will begin foraging and expanding the nest. Colony growth is typically moderate – expect a handful of workers within the first few months under good conditions. Be patient during the founding phase as this species can be slow to establish.

Behavior and Foraging

Workers of T. jordani are active foragers that collect seeds and bring them back to the nest for storage ^[1][3]. They nest in sandy soils with characteristic crater-shaped entrances ^[1][3]. In captivity, you will observe workers actively patrolling the outworld searching for food. They are not aggressive and can be observed easily during nest maintenance. Their medium size (5–6mm) makes them relatively easy to work with, and standard escape prevention measures are sufficient. They are diurnal foragers, most active during daylight hours when temperatures are warmest.

Frequently Asked Questions

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References