Messor desertora

Messor desertora

Messor desertora is a large harvester ant species native to the deserts of Inner Mongolia, China. Workers measure 8-9mm and are completely black with a dense covering of white hairs ^[1]. This species was described in 2009 and is specialized to harvest seeds from Nitraria shrubs (white thorn) that grow in sandy-gravel desert habitats ^[1]. The colonies build nests near these thorny bushes, with characteristic soil mounds around the entrance ^[1]. As a seed-harvesting ant, they play an important role in their desert ecosystem by dispersing seeds from the plants they collect.

Quick Summary

• Difficulty: Medium
• Origin & Habitat: Inner Mongolia desert region in northern China, specifically the Alashan plateau around 38-40°N latitude. They inhabit sandy-gravel desert and desert steppe at altitudes of 1150-1488m ^[1].
• Colony Type: Colony structure is unconfirmed. Based on typical Messor genus patterns, they likely form single-queen colonies (monogyne) ^[2].
  • Colony: Monogyne
  • Founding: Claustral
• Size & Growth:
  • Queen: Estimated 12-15mm based on worker size and genus patterns
  • Worker: 8.26-9.33mm ^[1]
  • Colony: Unknown, but likely several hundred workers based on related Messor species ^[2]
  • Growth: Moderate, seed-harvesting ants typically grow more slowly than predatory species
  • Development: Estimated 8-12 weeks based on related Messor species at optimal temperature ^[2] (Development time is temperature-dependent, cooler temperatures will slow development)
• Antkeeping:
  • Temperature: Keep at 20-26°C. As a desert species from a temperate region, they can tolerate cooler temperatures than tropical ants. Avoid overheating, do not exceed 30°C ^[1].
  • Humidity: Low humidity, these are desert ants. Keep the nest dry with only minimal moisture. The substrate should be mostly dry with occasional damp areas ^[1].
  • Diapause: Yes, as a species from Inner Mongolia (40°N latitude), they will need a winter rest period. Reduce temperature to 10-15°C for 2-3 months during winter ^[1].
  • Nesting: Use a dry, sandy substrate. A Y-tong or plaster nest works well. They prefer tight chambers and narrow passages. Ensure excellent drainage to prevent moisture buildup ^[1].
• Behavior: These ants are generally docile and not aggressive. They are seed-harvesters by nature, collecting and storing seeds in their nest. Workers are large enough to handle significant seed sizes. They are not known for stinging and pose no danger to keepers. Escape risk is moderate, their large size makes them easier to contain, but they can still climb smooth surfaces ^[2].
• Common Issues: moisture kills desert ants, overwatering is the most common mistake, temperature extremes, they cannot handle high heat like tropical ants, winter die-off, colonies often fail if not given proper hibernation, seed mold, stored seeds can develop mold if humidity is too high, slow growth tests patience, beginners may overfeed trying to speed up development

Housing and Nest Setup

Messor desertora requires a dry, well-drained nest environment. A Y-tong (acrylic) nest or plaster formicarium works best. The chambers should be appropriately sized for their large workers, around 8-10mm passages. Add a small water reservoir but keep most of the nest dry. For the outworld, use a shallow container with a sandy substrate they can dig in if desired. These ants are not climbers like some species, but still use barrier tape or fluon on container edges as a precaution. A test tube setup can work for founding colonies if kept horizontal with minimal water. The key is drainage, water should not pool in the nest area. ^[1][2]

Feeding and Diet

As seed-harvesting ants, their primary food is seeds. Offer a variety of grass seeds, bird seed, or specially prepared ant seed mixes. They particularly favor seeds from the Nitraria plants they collect in the wild, but will accept many common seeds. Supplement with protein sources like small insects (mealworms, crickets) or protein jelly. Sugar water or honey can be offered occasionally but is not required, these ants get most energy from seeds. For founding colonies, the queen will not eat, she uses stored fat reserves. Once workers arrive, they will begin seed storage behavior. Remove any moldy seeds promptly to prevent colony health issues. ^[1][2]

Temperature and Seasonal Care

This species comes from the deserts of Inner Mongolia at around 40°N latitude, so they are adapted to temperate conditions with cold winters. Keep the nest at 20-26°C during the active season. They can tolerate room temperature (around 20-22°C) quite well. During winter, they require a diapause period, reduce temperature to 10-15°C for 2-3 months. This mimics their natural seasonal cycle and is essential for long-term colony health. Do not confuse this desert species with tropical ants, they cannot handle high temperatures above 30°C. A heating cable is generally not needed and could be harmful if misapplied. ^[1]

Colony Founding

Queens are claustral, they seal themselves in a chamber and raise the first brood alone using stored fat reserves. The founding chamber should be small and dark. Do not disturb the queen during this time. After 4-8 weeks (depending on temperature), the first workers (nanitics) will emerge. These initial workers are typically smaller than mature workers. The colony will gradually grow as more workers hatch. During founding, no food is needed, the queen will not leave to forage. Once workers emerge, they will begin collecting seeds and tending the brood. ^[2]

Growth and Development

Messor desertora is a slow-growing species compared to many ants. From egg to first worker, expect 8-12 weeks at optimal temperature (around 24°C). Cooler temperatures will extend this timeline significantly. The first workers (nanitics) are smaller than mature major workers. As the colony grows, larger major workers will develop. Seed-harvesting ants typically have a more extended development period than predatory species. Patience is key, a healthy colony will grow steadily but slowly. Do not overfeed in an attempt to speed growth, as excess food leads to mold problems. ^[2]

Frequently Asked Questions

References