Monomorium maryannae

Quick Summary

• Difficulty: Medium
• Origin & Habitat: Northern Australia, found in the Kimberley region of Western Australia, the far north of the Northern Territory, and northwest Queensland ^[1]. Inhabits tropical regions with warm temperatures year-round.
• Colony Type: Colony structure is unconfirmed. Based on typical Monomorium patterns, likely single-queen colonies, but this has not been directly studied.
• Size & Growth:
  • Queen: Size data unavailable, no specific measurements exist for queens. Inferred from large worker size and genus patterns to be approximately 6-8mm.
  • Worker: Approximately 3-4mm total length, inferred from Monomorium genus patterns ^[1].
  • Colony: Unknown, no specific colony size data exists for this species.
  • Growth: Unknown, not studied for this species.
  • Development: Unknown, development timing has not been documented for this species. (Development time is unconfirmed. Estimates based on genus-level data for similar tropical Australian Monomorium species may be inaccurate.)
• Antkeeping:
  • Temperature: Keep at 24-28°C. Based on their tropical Australian distribution, they prefer warm conditions. A heating cable on one side of the nest creates a suitable gradient.
  • Humidity: Moderate humidity around 50-70%. These are ants from tropical regions, so they tolerate drier conditions better than rainforest species. Allow the nest substrate to dry partially between waterings.
  • Diapause: Not required. As a tropical Australian species, they do not typically enter true diapause. A slight reduction in temperature during winter months (down to around 20-22°C) may be beneficial but is not necessary.
  • Nesting: In nature, they likely nest in soil or under stones in tropical areas. In captivity, a Y-tong (AAC) nest or plaster nest works well. They prefer tight, snug chambers scaled to their size. A test tube setup can work for founding colonies.
• Behavior: Monomorium ants are generally not aggressive. They are active foragers that search for food both on the ground and on low vegetation. Workers are amber-orange colored and quite distinctive in appearance. This species has a sting but is not known for aggressive behavior or painful stings, they are docile and unlikely to sting handlers.
• Common Issues: limited data means care recommendations are based on genus-level inference rather than species-specific research, tropical species may not tolerate cool temperatures, keep above 22°C, genetically variable across range, some regional populations may have different care needs, queen size and colony development data is unavailable, no specific measurements exist

Appearance and Identification

Monomorium maryannae is a relatively large ant within the Monomorium genus. They belong to the Monomorium rothsteini species group and display a distinctive amber to orange coloration. The head, mesosoma, and legs range from light to dark amber orange, while the abdominal tergites are dark brown and the sternites are amber. Key identification features include a deeply concave clypeus (the area just above the mouth), medium-sized eyes, and a propodeum (the section behind the waist) with dorsolateral angles that almost form a right angle. This species shows considerable variation across its range, specimens from the northern Northern Territory and Western Australia are notably larger and more robust than those from Queensland. They are also one of the most genetically diverse species within the rothsteini complex ^[1].

Natural Habitat and Distribution

This species is endemic to northern Australia, specifically found in the Kimberley region of Western Australia, the far north of the Northern Territory, and northwest Queensland. Their habitat consists of tropical areas. The distribution overlaps with other Monomorium species like Monomorium geminum, Monomorium topend, and Monomorium subapterum. Being a tropical species, they experience warm temperatures year-round in their native range ^[1].

Feeding and Diet

Like most Monomorium species, these ants are omnivorous and likely feed on honeydew, small insects, and nectar in the wild. In captivity, they readily accept sugar water or honey as an energy source. For protein, offer small insects such as fruit flies, small mealworms, or other appropriately-sized prey. They are active foragers and will search for food both on the ground and may climb slightly on vegetation in the outworld. Feed protein sources 2-3 times per week and keep a sugar source constantly available. Remove any uneaten prey after 24-48 hours to prevent mold issues.

Temperature and Heating

As a tropical Australian species, Monomorium maryannae requires warm temperatures to thrive. Keep the nest area between 24-28°C for optimal colony health and development. A heating cable placed on one side of the nest can create a temperature gradient, allowing the ants to regulate their own temperature by moving between warmer and cooler areas. Avoid temperatures below 22°C for extended periods, as this species is adapted to tropical conditions and may become sluggish or stop brood development in cooler temperatures. Room temperature may be sufficient in warm climates, but most keepers will need supplemental heating.

Nesting Preferences

In their natural habitat, Monomorium maryannae likely nests in soil or under stones in tropical areas. For captive care, a Y-tong (AAC) nest or plaster nest works well. They prefer snug, appropriately-sized chambers that match their body size. A test tube setup can work for founding colonies, but monitor for mold issues. Ensure the nest has some damp substrate for humidity but also dry areas where ants can retreat if conditions become too moist. These ants do not require the high humidity levels needed by rainforest species.

Colony Establishment

The founding behavior of Monomorium maryannae has not been directly documented. Based on typical Monomorium patterns, they are likely claustral founders, the queen seals herself in a chamber and relies on stored fat reserves to survive until her first workers emerge. The founding chamber should be small and snug. After the first workers emerge, the colony can be moved to a larger nest if needed. Growth rate is unknown for this specific species.

Frequently Asked Questions

Report an Issue

The current care sheet is based fully on literature. See inconsistencies, or something that's incorrect? Please report here, it will be resolved after review from an admin. Contributing to the blogs tab also helps providing information, to make us be able to further improve the caresheets. Thank you for your support!

References