Myrmecina nesaea

Quick Summary

• Difficulty: Cannot be kept, worker caste undescribed, type specimen lost
• Origin & Habitat: Sebesi Island, Indonesia (near Krakatau Islands) in the Sunda Strait, between Java and Sumatra. This volcanic island has a tropical climate. The specific microhabitat preferences are unknown, but Myrmecina species generally are forest-floor ants that nest in soil, rotting wood, or under stones in humid environments ^[1][2].
• Colony Type: Unconfirmed, only a single queen specimen has ever been collected. The colony structure (single-queen vs multi-queen) is unconfirmed. Related Myrmecina species form small colonies of 30 to fewer than 150 workers ^[1].
• Size & Growth:
  • Queen: 2.2mm (total length from original description) ^[2]
  • Worker: Unknown, worker caste has never been described
  • Colony: Unknown for this species. Related Myrmecina species have small colonies of up to 150 workers ^[1]
  • Growth: Unknown
  • Development: Unknown, no development data exists for this species (Development timeline cannot be estimated without any captive observation or worker description)
• Antkeeping:
  • Temperature: Unknown for this species. Based on typical Myrmecina preferences from related species, moderate temperatures (roughly 20-25°C) are likely appropriate, but this is an estimate only ^[1].
  • Humidity: Unknown specifically. Myrmecina generally prefer humid forest-floor conditions, so moderate to high humidity is probable, but unconfirmed for this species ^[1].
  • Diapause: Unknown, no seasonal data exists for this species. Indonesian islands do not experience harsh winters, so diapause may not be required ^[2].
  • Nesting: Unknown, no natural nesting observations exist. Related Myrmecina species nest in soil, rotting wood, or under stones in shaded, humid locations ^[1].
• Behavior: Unknown, the species is known only from a single museum specimen collected nearly a century ago. No behavioral observations exist in scientific literature. Related Myrmecina species are generally non-aggressive, slow-moving forest-floor ants that specialize in preying on oribatid mites ^[1]. Escape risk cannot be assessed without worker description.
• Common Issues: this species has never been kept in captivity, no care parameters are established, worker caste is unknown, making identification of any collected colony impossible, the type specimen location is unknown, preventing verification of species identity, no captive breeding records exist, wild colonies have never been documented, related Myrmecina species are specialized mite predators requiring specific prey that may be difficult to provide, even if you found Myrmecina on Sebesi Island, there would be no way to confirm it is this species

Why Myrmecina nesaea Cannot Be Kept

This species represents one of the most challenging cases in antkeeping: it is known from a single queen collected in 1921,and the worker caste has never been described. The original specimen's location is unknown, and recent taxonomic work could not confirm the species identity. This means there is no established care guide, no way to verify if a collected colony is actually M. nesaea, and no documented cases of this species being successfully maintained in captivity. Even if you were to find a Myrmecina colony on Sebesi Island, there would be no morphological characters to confirm it belongs to this specific species. For these reasons, M. nesaea is not a species that can be responsibly kept or recommended for antkeeping, it exists in scientific literature but not in practical antkeeping. ^[2]

The Myrmecina Genus

Myrmecina is a genus of small Myrmicinae ants distributed across the Indomalayan region, with some species in the Nearctic and Palearctic. As of 2016,there are 51 valid species plus one subspecies. These are small ants that inhabit forest floors and nest in soil, rotting wood, or under stones. Some Myrmecina species exhibit queen polymorphism, with both normal-sized queens (macrogynes) and tiny queens (microgynes) occurring in the same species. Colonies are generally small, with typically fewer than 150 workers. Two Japanese species have been observed specializing in predation on oribatid mites, suggesting this may be a genus-wide dietary preference. ^[1]

Sebesi Island and Krakatau

Sebesi Island sits in the Sunda Strait between Java and Sumatra, Indonesia, very close to the famous Krakatau volcano. The island has a tropical climate and has been shaped by volcanic activity, the 1883 Krakatau eruption devastated the surrounding islands. The original M. nesaea specimen was collected by Dammerman on October 26,1921,during a biological survey. This makes the species nearly a century old in terms of documented knowledge, with no additional specimens or observations recorded since. The Indonesian archipelago provides habitat for numerous Myrmecina species, with six species documented from Sundaland. ^[2]

Related Species That Can Be Kept

While M. nesaea itself cannot be maintained, several Myrmecina species are established in antkeeping. If you are interested in keeping Myrmecina ants, look for described species with known worker castes. Related species from Sundaland include Myrmecina species described from Sumatra by Satria and Yamane (2019). These species would have similar care requirements: small colonies, moderate humidity, and likely a diet based on small prey (especially oribatid mites or other micro-arthropods). Always verify that the species you keep has a properly described worker caste and established care parameters before purchasing. ^[1]

Frequently Asked Questions

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References