Myrmecina lombokensis

Quick Summary

• Difficulty: Unknown, too little documented
• Origin & Habitat: Lombok Island, Indonesia (Indomalaya region). Found at elevations of 260-750m in forested habitat ^[1].
• Colony Type: Unconfirmed, colony structure has not been documented for this species.
• Size & Growth:
  • Queen: Not yet described ^[1]
  • Worker: 2.45-2.65mm total length ^[1]
  • Colony: Unknown, no colony size data available
  • Growth: Unknown, no development data exists
  • Development: Unconfirmed, no direct measurements exist for this species. (No development data exists for this species. Any estimates would be speculative.)
• Antkeeping:
  • Temperature: Estimated at 24-28°C based on tropical origin, no thermal studies exist for this species.
  • Humidity: Estimated moderate to high based on tropical island origin, no humidity data exists.
  • Diapause: Unlikely, as a tropical species from near the equator (8°S latitude), seasonal temperature variation is minimal.
  • Nesting: Inferred from genus patterns, likely nests in soil or under stones in shaded forest floor areas. A small test tube setup with moist substrate would be appropriate.
• Behavior: Not specifically documented. Based on genus-level patterns, Myrmecina species are generally docile and non-aggressive. Their large eyes suggest surface-active foraging. Escape prevention is critical due to their very small size, they can squeeze through standard gaps that larger ants cannot. Use fine mesh barriers and ensure all connections are sealed.
• Common Issues: no documented biology means all care is experimental, tiny size creates high escape risk, use fine mesh and check all seals, no colony size data makes it hard to know when to upgrade housing, queen has not been described, wild-queen founding may be challenging, no known dietary preferences, experimental feeding required

Discovery and Description

Myrmecina lombokensis was formally described in 2020 by Hirofumi Okido, Kazuo Ogata, and Hosoishi. The species is known only from Lombok Island in Indonesia, where it was collected at two locations: Pusuk Pass at 260m elevation and Senaru at 750m elevation ^[1]. The type specimens were collected in October 2000,but the species was not formally described until two decades later ^[1]. It resembles Myrmecina asthena but can be distinguished by its medium-sized, oval-shaped eyes with approximately 14 ommatidia ^[2]. This species represents one of the newest additions to ant taxonomy, with virtually no captive husbandry information available.

Identification and Morphology

Workers are tiny at just 2.45-2.65mm total length, with a subrectangular head that is as long as it is broad ^[1]. The most distinctive feature is their large, convex eyes measuring 0.08mm in diameter with 5 ommatidia, relatively large eyes for such a small ant ^[1]. They have short antennal scapes that just reach the posterolateral corners of the head. The propodeal spines are elongate and direct backward with a weak upward curve. The body is black to dark reddish brown, while the mandibles, antennae, and legs are brown to yellowish brown ^[1]. The dorsal surface has dense, short pilosity (fine hairs).

Defense Mechanism

Myrmecina lombokensis belongs to the subfamily Myrmicinae, tribe Crematogastrini. Members of this tribe possess a modified, flattened spatulate stinger used to wipe or smear venom onto enemies rather than piercing flesh.

Housing and Nesting

No natural nesting observations exist for this species. Based on typical Myrmecina genus behavior, they likely nest in soil or under stones in shaded areas. For captive care, a small test tube setup works well for founding colonies given their tiny size. The test tube should have a water reservoir but be sized appropriately, these ants are only 2.5mm, so standard test tubes are fine but ensure the cotton is packed tightly. A small Y-tong style nest with narrow chambers would also be appropriate. The nesting area should be kept moist but not saturated.

Feeding and Diet

Dietary preferences are completely unstudied for this species. Based on genus patterns, Myrmecina species are typically generalist foragers that likely consume small insects, honeydew, and nectar. Given their tiny size, any prey offered should be appropriately sized, fruit flies, pinhead crickets, or small mealworms would be appropriate. Sugar water or honey water may be accepted. Start with small live prey and observe acceptance. Remove any uneaten food after 24-48 hours to prevent mold.

Temperature and Environmental Needs

No thermal tolerance data exists. As a tropical species from Lombok Island, Indonesia (located just south of the equator at approximately 8°S latitude), they likely prefer warm, stable conditions. The island has a tropical climate with temperatures ranging from 24-32°C year-round. For captive care, aim for temperatures in the mid-70s to low 80s Fahrenheit (24-28°C). A heating cable on one side of the nest can create a gradient if your room temperature is cooler. Avoid temperature extremes and sudden fluctuations.

Behavior and Temperament

Specific behavioral observations do not exist in the scientific literature for this species. Based on genus-level patterns, Myrmecina species are generally docile and not particularly aggressive. Their large eyes suggest they may rely more on visual cues than many ant species. Workers are likely surface-active foragers. The most important practical consideration is their tiny size, at only 2.5mm, they can escape through gaps that seem sealed to larger ants. Use fine mesh (at least 0.5mm) for all ventilation and ensure all connections are tight. Check for escapes daily, especially when the colony is small.

Frequently Asked Questions

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References