Pheidole susanowo

Quick Summary

• Difficulty: Expert
• Origin & Habitat: Endemic to Japan's Nansei Islands (Tokara Islands to Yaeyama Islands), found on Ishigaki Island, Okinawa, and Chichi-jima in the Ogasawara Islands ^[1][2]. They inhabit forests and forest edges at low elevation, typically nesting in soil ^[3].
• Colony Type: Unconfirmed, no direct evidence of queen number from research, but based on Pheidole genus patterns, likely monogyne.
• Size & Growth:
  • Queen: 4.3 mm ^[1]
  • Worker: Minor workers approximately 2 mm, soldiers approximately 3.5 mm ^[2]
  • Colony: Unknown
  • Growth: Unknown
  • Development: Unconfirmed, no direct observations exist (Based on typical Pheidole patterns and subtropical location, development may take 4-8 weeks at warm temperatures, but this is an estimate only)
• Antkeeping:
  • Temperature: Based on their subtropical habitat, aim for warm conditions around 24-28°C ^[1][2].
  • Humidity: Keep substrate consistently moist but not waterlogged, based on their soil-nesting habits ^[3].
  • Diapause: Unconfirmed, as a subtropical species, likely no true hibernation needed, but may slow down during cooler months ^[1][2].
  • Nesting: Soil-nesting habits suggest Y-tong (AAC) or plaster nests with moist substrate ^[3].
• Behavior: Pheidole susanowo is defensive when disturbed, with soldiers responding to threats. Their tiny size makes escape prevention critical ^[3].
• Common Issues: their tiny size means escapes are likely without fine mesh barriers and tight-fitting lids., colonies are very rare in the hobby and wild-caught specimens are extremely uncommon., no established captive breeding protocols exist for this species., slow or nonexistent colony growth may frustrate keepers., humidity control is critical, too dry causes desiccation, too wet causes mold.

Nest Preferences and Housing

In the wild, Pheidole susanowo nests in soil, with colonies found in sugarcane fields and at wood margins ^[3]. For captive care, a Y-tong (AAC) nest or plaster formicarium with moist substrate mimics their natural environment well. Their extremely small size means you must use appropriately scaled chambers and narrow passages. A test tube setup can work for founding colonies, with migration to a proper nest once the colony reaches workers. Ensure the nest provides both moist areas for brood development and slightly drier areas for workers to regulate humidity.

Feeding and Diet

Like other Pheidole species, they are generalist omnivores that will likely accept both protein and carbohydrate sources. Offer small live prey appropriate to their tiny size, fruit flies, pinhead crickets, and small mealworms work well. They likely also consume honeydew from aphids and will accept sugar water or honey. Feed protein prey 2-3 times per week and keep a constant sugar water source available. Remove uneaten prey after 24-48 hours to prevent mold. ^[3]

Temperature and Seasonal Care

Being endemic to Japan's subtropical Nansei Islands, Pheidole susanowo prefers warm conditions. Aim for 24-28°C in the nest area, using a heating cable if your room temperature falls below this range. The Ryukyu Islands maintain warm temperatures year-round, so they may not require a true hibernation period. During winter, room temperature is likely sufficient. Avoid temperatures below 15°C for extended periods. A temperature gradient allows ants to self-regulate. ^[1][2]

Colony Structure and Development

This species is strongly dimorphic, meaning colonies have two distinct worker castes: minor workers and major workers/soldiers ^[2]. Queens measure about 4.3 mm and are larger than soldiers ^[1]. The colony structure is unconfirmed, but based on rarity and related species, colonies likely remain relatively small. Growth rate is unknown but is likely moderate given their subtropical location.

Handling and Temperament

Pheidole susanowo has typical Pheidole temperament, they are defensive when their nest is disturbed and will deploy soldiers in response to threats. Their tiny size means they pose minimal sting risk to humans, but escape risk is high. Use fine mesh, apply Fluon to barrier edges, and ensure all enclosures have tight-fitting lids. They are active foragers and will readily explore and recruit to food sources. ^[3]

Frequently Asked Questions

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References