Romblonella townesi

Quick Summary

• Difficulty: Unknown
• Origin & Habitat: Native to the Mariana Islands (Tinian Island) and possibly the Marshall Islands ^[1][2]. Habitat details are unconfirmed, but typical tropical island environments are assumed.
• Colony Type: Unconfirmed, colony structure has not been documented in scientific literature.
• Size & Growth:
  • Queen: Data unavailable
  • Worker: Data unavailable
  • Colony: Unknown
  • Growth: Unknown
  • Development: Unconfirmed, based on typical tropical Myrmicinae patterns, development likely takes 4-8 weeks at warm temperatures (estimate). (No specific development data exists for this species.)
• Antkeeping:
  • Temperature: Based on tropical island distribution, likely needs warm conditions (24-28°C). This is an estimate ^[1][2].
  • Humidity: Likely requires moderate to high humidity. Keep nest substrate moist but not waterlogged. No documented data.
  • Diapause: No, tropical species from the Mariana Islands do not require hibernation. No documented diapause requirements ^[1][2].
  • Nesting: Natural nesting behavior is unconfirmed. Based on typical small Myrmicinae, they may nest in soil, under stones, or in rotting wood. A test tube setup or Y-tong/plaster nest with small chambers is recommended. Avoid acrylic nests.
• Behavior: Behavior is undocumented. As a Myrmicinae, they have a functional stinger modified for venom smearing rather than piercing (subfamily/tribe defense). Their tiny size likely makes them timid. Escape prevention is essential due to small size.
• Common Issues: this species is extremely rare in the antkeeping hobby with no established care protocols, no documented feeding preferences or diet requirements exist, colony structure (monogyne vs polygyne) is completely unconfirmed, development timeline is unknown, making it difficult to assess colony health, wild-caught colonies may be difficult to obtain as the species has a very limited distribution

Species Background and Distribution

Romblonella townesi was originally described by M.R. Smith in 1953 from a worker collected in the Mariana Islands ^[3]. The only specific locality confirmed in the literature is Tinian Island ^[1]. AntWiki also lists the Marshall Islands, but this record may need verification ^[2]. This is a rarely collected species with almost no ecological data.

Identification and Morphology

Workers are small (exact size unmeasured) with propodeal spines about 0.3 mm long ^[1]. The pronotum lacks a distinct margination, and the mesosomal dorsum has fine reticulate sculpturing ^[1]. No queen or male have been described, making colony identification difficult.

Housing and Nesting

Because no captive care data exists, keepers must rely on inferences from related small Myrmicinae. A test tube setup with a water section is good for starting a colony. For larger groups, use Y-tong (AAC) or plaster nests with narrow chambers. Do not use acrylic nests. Provide a hydration source to maintain humidity in the nesting area.

Temperature and Care Requirements

Based on the tropical Mariana Islands distribution, aim for 24-28°C ^[1][2]. If your room stays in this range, no heating is needed. Keep humidity moderate to high. No diapause is expected.

Feeding and Diet

Feeding has never been studied. Offer small protein sources like fruit flies, tiny mealworms, or similarly sized live prey. Sugar water or diluted honey can also be offered. Because workers are tiny, prey must be appropriately small. Monitor the colony to see what they accept.

Behavior and Temperament

No behavioral observations have been published. As a member of Myrmicinae (tribe Crematogastrini), their stinger is modified into a spatulate organ for smearing venom rather than piercing. This suggests a chemical defense strategy. Their small size likely makes them non-aggressive. Use fine mesh barriers to prevent escape.

Defense Mechanism

Romblonella townesi belongs to the tribe Crematogastrini, which uses a smear defense. The stinger is flattened and spatulate, used to wipe or smear venom onto attackers. No specific literature exists for this species, so this is inferred from the tribe.

Frequently Asked Questions

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References