Myrmecina sabahna

Quick Summary

• Difficulty: Unknown, insufficient data
• Origin & Habitat: Borneo, Malaysia (Crocker Range National Park, Sabah) at approximately 1000m altitude. Found in a forested area near Mahua Waterfall ^[1].
• Colony Type: Colony structure is unconfirmed. Based on typical Myrmecina genus patterns, likely single-queen colonies.
• Size & Growth:
  • Queen: Unknown, not yet described in scientific literature ^[1]
  • Worker: Approximately 2.9mm total length ^[1]
  • Colony: Unknown, no colony data available
  • Growth: Unknown, no development data available
  • Development: Unknown, not studied in this species (No direct development data exists for this species.)
• Antkeeping:
  • Temperature: Based on origin (tropical Borneo,1000m altitude), likely prefer warm humid conditions around 24-28°C. The elevation suggests they can tolerate slightly cooler temperatures than pure lowland species.
  • Humidity: High humidity likely required, forest floor environment in Borneo. Keep nest substrate consistently moist but not waterlogged.
  • Diapause: Unlikely, being a tropical species from Borneo, they probably do not require a diapause period.
  • Nesting: No specific nesting data exists. Based on genus patterns, likely nests in soil, under stones, or in rotting wood in humid forest conditions. A small test tube setup with moist substrate would be appropriate for their tiny size.
• Behavior: Behavior is unstudied. Based on related Myrmecina species, they are likely docile, non-aggressive ants that forage individually or in small groups. Their tiny size means excellent escape prevention is critical, they can squeeze through standard test tube barriers. They probably feed on small insects, honeydew, and nectar like other small Myrmicinae.
• Common Issues: no biological data exists, all care recommendations are genus-level estimates, tiny size makes escape prevention critical, use fine mesh barriers, humidity requirements are uncertain, monitor for drying, growth rate is unknown, no confirmed diet acceptance, start with small live prey and sugar water

Discovery and Taxonomy

Myrmecina sabahna was formally described in 2020 by Hirofumi Okido, Kazuo Ogata, and Hosoishi. The species was discovered in the Crocker Range National Park in Sabah, Borneo, Malaysia, at an elevation of approximately 1000 meters near Mahua Waterfall. The type specimens (holotype and 5 paratype workers) were collected in November 2000 but only formally described two decades later ^[1].

The species is similar to Myrmecina insulana and Myrmecina yamanei but can be distinguished by its smooth and shining ventrolateral portion of the head, the presence of median paired processes on the anterior clypeal margin, and its short antennal scapes that just reach the occipital corner of the head ^[1].

Distribution and Habitat

This species is currently known only from its type locality in Sabah, Borneo, Malaysia. The Crocker Range National Park features montane forest environments with high humidity. The 1000m elevation suggests these ants live in a slightly cooler microclimate than lowland Borneo rainforests ^[1].

The Indomalaya region (which includes Borneo) is known for its high ant diversity, and Myrmecina species are typically found in forested areas with moist soil conditions. However, no specific habitat observations exist for this species.

Appearance and Identification

Workers of Myrmecina sabahna are tiny at approximately 2.9mm in total length. The body is primarily black, with reddish-brown mandibles and forecoxae, and yellowish-brown antennae and legs. The head is slightly longer than wide with a concave occipital margin and rounded corners. The dorsal surface of the head has wavy rugae (wrinkled texture), while the ventrolateral portion is notably smooth and shining ^[1].

The anterior clypeal margin has distinctive median paired processes. The antennal scapes are short, just reaching the posterolateral corners of the head. Small but visible spines are present on the mesosoma, including an eumetanotal spine and a triangular propodeal spine. The body is covered with dense, short pilosity (fine hairs) ^[1].

Keeping Myrmecina sabahna in Captivity

Since this species was only described in 2020 and has no documented biology, all captive care recommendations are estimates based on typical Myrmecina genus behavior and the known collection conditions. These are tiny ants requiring small enclosures with excellent escape prevention.

For housing, use small test tubes or a small formicarium setup scaled to their 3mm size. The nest area should be kept consistently moist but not flooded. Based on their origin in humid Bornean forest, aim for temperatures around 24-28°C with high humidity. A small water reservoir connected to the nest helps maintain humidity.

For feeding, start with small live prey (fruit flies, pinhead crickets, small mealworms) and sugar water or honey. Given their tiny size, prey items should be appropriately small. Observe feeding behavior to determine preferences. Replace uneaten food every 2-3 days to prevent mold.

Because no breeding data exists, founding behavior is unconfirmed for this species.

Frequently Asked Questions

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References