Mayriella ebbei

Mayriella ebbei

Mayriella ebbei is a tiny Myrmicinae ant species native to Australia, specifically found in the southernmost parts of the country including Australian Capital Territory, New South Wales, South Australia, and Victoria ^[1]. Workers are extremely small, measuring just 0.43-0.54mm in head width, making them one of the smaller ant species kept in captivity ^[1]. The species is distinguished by having numerous erect hairs on the gaster (abdomen), which helps separate it from other Mayriella species ^[1]. This is the southernmost species of Mayriella and occurs in generally drier habitats compared to its relatives, including sclerophyll woodlands, low scrub, ti-tree scrub, and coastal heath areas ^[1].

Quick Summary

• Difficulty: Medium
• Origin & Habitat: Australia (Australian Capital Territory, New South Wales, South Australia, Victoria), found in drier habitats including sclerophyll woodlands, low scrub, ti-tree scrub, and coastal heath, less commonly in wet sclerophyll and rainforests ^[1][2].
• Colony Type: Colony structure is unconfirmed. Nests occur in soil in the open or under stones or other objects on the ground, and in rotten wood ^[1].
• Size & Growth:
  • Queen: Unconfirmed, no specific measurements available for queens in primary literature ^[1]
  • Worker: 0.43-0.54mm head width,0.47-0.58mm head length ^[1]
  • Colony: Unknown, limited field data shows only 7 individuals total in one study ^[3]
  • Growth: Unknown, likely moderate based on small worker size
  • Development: Estimated 6-8 weeks based on typical Myrmicinae development patterns at warm temperatures (Development timeline is not directly studied for this species, estimate based on genus-level patterns)
• Antkeeping:
  • Temperature: Aim for 22-26°C. Classified as a Tropical-Climate Specialist in ecological studies, suggesting preference for warmer conditions ^[3]. Room temperature within this range is acceptable.
  • Humidity: Prefers drier conditions compared to other Mayriella species. Keep nest substrate moderately moist but allow some drying between waterings. Avoid overly damp conditions.
  • Diapause: Likely requires a winter rest period given southern Australian distribution. Provide 2-3 months at 10-15°C during austral winter (roughly November-February in Northern Hemisphere).
  • Nesting: Natural nesting sites include soil in the open, under stones, and in rotten wood ^[1]. A naturalistic setup with substrate that can hold some moisture but also dry out works well. Y-tong or plaster nests with moderate humidity chambers suit this species.
• Behavior: Mayriella ebbei is a tiny, non-aggressive species. Workers are small and slow-moving. They nest in soil and under objects, with colonies appearing to remain small in the wild ^[3]. Escape prevention is critical due to their extremely small size, they can squeeze through standard test tube barriers. Use fine mesh and tight-fitting lids. They are not known to sting and present no danger to keepers.
• Common Issues: escape prevention is critical due to tiny worker size, standard barriers may allow escapes, small colony sizes in the wild suggest colonies develop slowly and may be sensitive to disturbance, drier habitat preferences mean overwatering can be fatal, winter dormancy requirements may be easily overlooked in captive settings, limited natural history data means keepers must adapt care based on observation

Housing and Nest Setup

Mayriella ebbei is an extremely small ant that requires careful attention to escape prevention. Use test tubes with cotton plugs for founding colonies, but ensure the cotton is packed tightly and consider adding a secondary barrier like fluon. For established colonies, a Y-tong (acrylic) nest or plaster nest works well, these allow you to control humidity precisely. The species naturally nests in soil, under stones, and in rotten wood, so a naturalistic setup with a soil chamber also works. Keep chambers appropriately sized for their tiny workers, large open spaces can stress them. Ensure all connections between outworld and nest have barriers that account for their small size. ^[1]

Feeding and Diet

Mayriella ebbei is a typical Myrmicinae ant, likely feeding on small insects and honeydew in the wild. Offer small live prey such as fruit flies, pinhead crickets, and small mealworms. Sugar water or honey should be offered regularly as an energy source. Due to their tiny size, prey items should be appropriately sized, even a single fruit fly is a substantial meal for these ants. Feed small amounts every 2-3 days and remove uneaten prey to prevent mold. Their small colony sizes in the wild suggest they are not heavy foragers ^[3].

Temperature and Seasonal Care

This species is classified as a Tropical-Climate Specialist, suggesting they prefer warmer conditions ^[3]. Maintain temperatures between 22-26°C for optimal colony health and brood development. A heating cable on one side of the nest can create a temperature gradient, allowing ants to self-regulate. Given their southern Australian distribution, they likely experience cooler winters and will benefit from a hibernation-like rest period. Provide 2-3 months at 10-15°C during winter months, this mimics their natural seasonal cycle in the cooler parts of their range.

Humidity Requirements

Mayriella ebbei is notable for occurring in generally drier habitats compared to other Mayriella species ^[1]. This means you should avoid keeping them in constantly humid conditions. Allow the nest substrate to dry partially between waterings. A humidity range of 40-60% in the nest area is appropriate. Provide a water tube in the outworld so they can access drinking water. The key is balance, some moisture for brood development, but not the saturated conditions that suit rainforest species.

Colony Development and Growth

Little is known about the exact development timeline for Mayriella ebbei. Based on typical Myrmicinae patterns and their small worker size, expect 6-8 weeks from egg to first worker at optimal temperatures. Colonies appear to remain small in the wild, the limited field data shows only single-digit worker counts in trap samples ^[3]. This suggests they are not a fast-growing species and keepers should not expect rapid colony expansion. Patience is key with this species. Queens have not been specifically measured but would be expected to be modestly larger than workers.

Frequently Asked Questions

References