Crematogaster jeanneli

Quick Summary

• Difficulty: Medium
• Origin & Habitat: Eastern Africa, specifically Kenya and Rwanda. The type locality is River Tchania in Kenya at 1520m elevation, and specimens have been collected in Akagera National Park in the east and Nyungwe Tropical Rain Forest in the southwest ^[1][2]. The Rwanda locations are tropical rain forest habitats, suggesting this species prefers humid, shaded forest environments.
• Colony Type: Colony structure is unconfirmed. No data exists on whether this species forms single-queen or multi-queen colonies.
• Size & Growth:
  • Queen: Size data unavailable, no measurements exist for this species. Based on typical Crematogaster genus patterns, queens likely fall in the 7-10mm range.
  • Worker: Size data unavailable, no specific measurements documented. Based on genus patterns, workers likely range 3-6mm.
  • Colony: Unknown, no colony size data available for this species.
  • Growth: Unknown, no development data exists.
  • Development: Unknown, no species-specific development data exists. (No data available for this species.)
• Antkeeping:
  • Temperature: Keep at 22-26°C. This range is inferred from the tropical rain forest habitat in Rwanda and typical Crematogaster preferences. Provide a gentle temperature gradient allowing workers to self-regulate.
  • Humidity: High humidity required, aim for 70-85%. The species comes from humid tropical forest environments in Rwanda. Keep the nest substrate consistently moist but not waterlogged.
  • Diapause: No, given the African tropical distribution, hibernation is likely not necessary.
  • Nesting: No specific nesting data exists for this species. Based on typical Crematogaster behavior and the forest habitat, they likely nest in rotting wood, under bark, or in soil cavities. In captivity, a Y-tong (AAC) nest or plaster nest with good moisture retention works well for forest-dwelling Myrmicinae.
• Behavior: Temperament is unconfirmed, but Crematogaster species are generally moderate in aggression. They possess a modified stinger used to smear venom onto enemies rather than piercing. When threatened, they raise their abdomen in a defensive display and may release a foul-smelling secretion. They are arboreal to ground-nesting and typically forage in trees and on vegetation. Escape prevention should be good as workers are small but not tiny, standard barriers should suffice. They likely forage for honeydew and small insects.
• Common Issues: no specific data on founding behavior makes initial colony establishment uncertain, humidity requirements are high, incorrect moisture levels may cause colony decline, no documented diet preferences, may require experimentation to determine accepted foods, tropical origin means temperature drops below 20°C could stress the colony, no documented colony size data available

Natural History and Distribution

Crematogaster jeanneli is known only from eastern Africa, specifically Kenya and Rwanda. The species was originally described from Kenya's River Tchania at 1520 meters elevation, indicating it prefers highland habitats. More recent surveys have documented the species in Rwanda, including Akagera National Park in the east and Nyungwe Tropical Rain Forest in the southwest ^[1][2]. The Rwanda records from tropical rain forest environments suggest this species thrives in humid, shaded forest habitats at moderate elevations. The limited distribution data makes it difficult to determine the full range of this species, as it may occur in similar highland forest habitats throughout the Albertine Rift region.

Housing and Nesting

Based on the species' forest habitat in Rwanda, provide a nest that maintains high humidity. A Y-tong (AAC) nest or plaster formicarium works well for forest-dwelling Myrmicinae. The nest should have chambers scaled appropriately for workers likely in the 3-6mm range. Keep the nest substrate consistently moist, the substrate should feel damp to the touch but not have standing water. Provide an outworld area for foraging with access to sugar sources and protein. Since this is likely an arboreal to ground-nesting species, include some vertical space or branches in the outworld. Use standard escape prevention measures appropriate for small ants.

Feeding and Diet

No specific diet data exists for Crematogaster jeanneli. Based on typical Crematogaster behavior, they likely feed on honeydew from aphids and scale insects, plus small insects for protein. In captivity, offer sugar water or honey constantly as an energy source. For protein, offer small insects like fruit flies, small mealworms, or cricket pieces. Some Crematogaster species are attracted to sweet foods more than others, so experimentation may be needed. Feed protein 2-3 times per week and ensure sugar sources are available at all times.

Temperature and Seasonal Care

Maintain temperatures between 22-26°C based on the species' tropical rain forest origin in Rwanda. A slight temperature gradient allows the colony to self-regulate. Room temperature in most homes should work well, but a heating cable on one side of the nest can help maintain optimal range if needed. Place heating on top of the nest to avoid drying. No data exists on diapause requirements, but given the African tropical distribution, a true hibernation is likely not necessary. Some keepers reduce activity in winter months by lowering temperatures slightly (by 2-3°C), but this is optional for tropical species.

Frequently Asked Questions

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References