Ooceraea hainingensis

Quick Summary

• Difficulty: Expert
• Origin & Habitat: Only known from the type locality in Haining, Zhejiang Province, China (30.372187°N,120.810766°E). Found nesting in soil beneath bamboo forest with high canopy cover and low light penetration ^[1]. Temperature at collection was 20°C ^[1].
• Colony Type: Single-queen colony with 17 workers collected from the type colony. The presence of a dealate queen distinguishes this species from its close relative Ooceraea biroi, which is queenless ^[1]. Colony structure beyond this single collection is unknown.
• Size & Growth:
  • Queen: size data unavailable
  • Worker: size data unavailable
  • Colony: Up to 17 workers ^[1]
  • Growth: Unknown
  • Development: Unknown, no development data exists for this species ^[1] (Development timeline has not been studied.)
• Antkeeping:
  • Temperature: Keep around 20-24°C based on collection temperature of 20°C ^[1]. Start at room temperature and observe colony activity.
  • Humidity: Keep the nest substrate consistently moist but not waterlogged, as they are subterranean ants from forest floor soil ^[1].
  • Diapause: Unknown, no data on overwintering requirements ^[1].
  • Nesting: Natural nesting is in soil. In captivity, use a small test tube setup or a nest made of soil, plaster, Y-tong, or 3D-printed materials with tight chambers suitable for their tiny size. Keep the nest dark due to their blindness ^[1].
• Behavior: Based on its Dorylinae classification, O. hainingensis may exhibit predatory behavior, but this is not confirmed in the research. Workers are blind and navigate chemically. They are extremely small, so escape prevention is critical. Temperament is unknown ^[1][2].
• Common Issues: this is a newly described species with no established care protocols, so recommendations are speculative., no information on what foods they accept in captivity., colony may be fragile due to small wild population., blind workers may be stressed by excessive light., escape prevention is critical due to tiny size., no data on mortality causes in captivity.

Discovery and Taxonomy

Ooceraea hainingensis was described in 2024 from a colony collected in Haining, Zhejiang Province, China ^[1]. It is placed in the subfamily Dorylinae and is closely related to Ooceraea biroi, a queenless species that reproduces clonally ^[1]. The discovery of a dealate queen suggests O. hainingensis may have retained queen-based reproduction ^[1]. Molecular analysis confirms it as a distinct species ^[1].

Identification and Morphology

Workers are identified by their 9-segmented antenna, complete absence of eyes, and a prominent thumb-like subpetiolar process ^[1]. The body has obvious sutures between the mesonotum and metanotum, differing from O. biroi ^[1]. Workers are light brown to dark reddish-brown with dense foveae ^[1]. The queen is slightly larger and retains eyes and ocelli, unlike blind workers ^[1].

Housing and Nesting

In the wild, O. hainingensis nests in soil beneath bamboo forest with high canopy cover and low light penetration ^[1]. For captivity, use a small test tube setup or a nest made of soil, plaster, Y-tong, or 3D-printed materials with tight chambers. Keep the nest dark and humid. Escape prevention is critical due to their tiny size ^[1].

Feeding and Diet

As a Dorylinae army ant, O. hainingensis is likely predatory, but this is not confirmed in the research ^[1]. In captivity, offer small live prey appropriate to their size, such as fruit flies or springtails ^[2]. Sugar acceptance is uncertain. Remove uneaten prey to prevent mold ^[2].

Temperature and Seasonal Care

The collection temperature was 20°C, suggesting moderate temperature preference ^[1]. Start around 20-24°C and observe colony behavior. No data exists on diapause requirements ^[1].

Colony Structure and Reproduction

The type colony had one dealate queen and 17 workers ^[1]. This differs from O. biroi, which is queenless ^[1]. Colony size and reproduction details are unknown beyond this observation ^[1].

Frequently Asked Questions

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References