Temnothorax pastinifer

Quick Summary

• Difficulty: Medium
• Origin & Habitat: Low elevations of the Bahamas and Cuba. Found in littoral (coastal) habitats, nesting in soil under stones or leaves, and under dead palmetto leaves ^[1].
• Colony Type: No specific data. Most Temnothorax species have single-queen (monogyne) colonies, but this is unconfirmed for T. pastinifer.
• Size & Growth:
  • Queen: 4.4-4.6 mm ^[1]
  • Worker: 2.7-3.5 mm ^[1]
  • Colony: Unknown. No data for this species.
  • Growth: Unknown
  • Development: Unknown (No development data available for this species.)
• Antkeeping:
  • Temperature: Unknown. As a tropical Caribbean species, it likely does best in warm conditions (around 22-28°C), but exact requirements are not documented. Start with stable room temperature and observe.
  • Humidity: Unknown. In nature it nests under stones/leaves in coastal areas, so moderate to high humidity is likely. Provide a moisture gradient in the nest, with one area damp but not waterlogged.
  • Diapause: Unknown. Since it comes from a tropical climate, a true hibernation period is unlikely, but this has not been studied. Keep warm year-round.
  • Nesting: Based on natural history: prefers tight, humid chambers. Test tubes with a water reservoir or a small Y-tong nest with a moist substrate work well. Mimic its natural under-stone habitat with a dark, enclosed nesting space.
• Behavior: Docile and non-aggressive. Its main defense is a modified spatulate stinger used to smear venom onto enemies rather than piercing flesh (typical for its subfamily and tribe). It rarely uses this against humans. Escape risk is moderate due to its small size (under 4 mm) – ensure no gaps wider than 1 mm.
• Common Issues: escape prevention is critical – small size means they can squeeze through tiny gaps., humidity control is key – too dry or too wet can stress or kill the colony., little is known about the exact care of this species – be prepared to experiment and adjust., wild-caught colonies may carry parasites or suffer from collection stress.

Housing and Nest Setup

Since natural history data is limited, setup advice is based on general Temnothorax care and the species' reported nesting sites (under stones/leaves). Use a test tube with a water reservoir for small colonies, keep the cotton plug moist. As the colony grows, offer a small Y‑tong (AAC) or plaster nest with tight chambers. The nest should stay dark and humid. Because workers are only 2.7–3.5 mm, make sure all connections are sealed to prevent escape. An outworld with a textured floor helps them forage ^[1].

Feeding and Diet

No specific dietary data exists for this species, but most Temnothorax are omnivorous. Offer a mix of carbohydrates (honey water, sugar water) and protein (small insects like fruit flies or pinhead crickets). Feed tiny amounts every 2–3 days and remove leftovers after 24 hours. A constant sugar source is helpful but not confirmed. Adjust based on colony response.

Temperature and Seasonal Care

Exact temperature needs are unknown. Because the species lives in the tropical Caribbean (Bahamas & Cuba), it likely prefers warm conditions (around 22–28°C). Avoid allowing the nest to drop below 20°C for extended periods. A heating cable on one side of the nest can create a gradient if your room is cool. There is no evidence that this species requires a winter diapause, keep it warm year-round. Monitor the colony's activity level to gauge comfort ^[1].

Behavior and Observation

Temnothorax pastinifer is reported to run over the ground and nest under stones or dead leaves. It is likely a timid, non‑aggressive ant. Its primary defense is a flattened stinger used to smear venom, but this is rarely used against humans. Workers are small and can be hard to spot – use a magnifying glass or good lighting. There are no observations on foraging or recruitment behavior, so careful observation is encouraged.

Colony Founding

Founding behavior is completely unconfirmed. If you obtain a queen, assume typical ant founding: place her in a test tube with a water reservoir and cotton plug. Provide darkness and do not disturb for several weeks. There is no guarantee that she will be claustral or fully claustral. Be patient – successful founding may take several months. Starting with multiple queens (if legally obtained) may improve your chances.

Frequently Asked Questions

Report an Issue

The current care sheet is based fully on literature. See inconsistencies, or something that's incorrect? Please report here, it will be resolved after review from an admin. Contributing to the blogs tab also helps providing information, to make us be able to further improve the caresheets. Thank you for your support!

References