Myrmica commarginata

Quick Summary

• Difficulty: Unknown, limited data available
• Origin & Habitat: South Siberia and Mongolia. Inhabits steppes and dry meadows with sandy soil, typically at lower altitudes between 600-800 m ^[1][2][3].
• Colony Type: Unknown, only worker caste has been described.
• Size & Growth:
  • Queen: Size data unavailable, queen caste has not been described ^[1]
  • Worker: Size data unavailable, specific measurements not available ^[1]
  • Colony: Unknown, colony size has not been documented ^[1]
  • Growth: Unknown, growth rate has not been studied
  • Development: Unconfirmed, development timeline has not been studied for this species (No species-specific data available.)
• Antkeeping:
  • Temperature: Keep around 20-24°C. Room temperature within this range is suitable.
  • Humidity: Moderate humidity preferred. Keep nest substrate moist but not waterlogged. Steppe and dry meadow habitat suggests they can tolerate somewhat drier conditions than forest-dwelling Myrmica.
  • Diapause: Yes, Myrmica species require winter hibernation. Provide 3-4 months at 5-10°C during winter months.
  • Nesting: Natural nesting occurs in sandy soil under stones in steppe habitats. In captivity, standard test tubes or Y-tong nests work well. Provide sandy substrate if using naturalistic setups.
• Behavior: Behavior is not specifically documented. Based on typical Myrmica patterns, they are moderately active foragers, likely accepting protein prey and sugar sources. Standard escape prevention is adequate for their size.
• Common Issues: this species is extremely rare in the antkeeping hobby, finding a queen or colony would be exceptional, no established care protocols exist, all recommendations are estimates based on genus patterns, queen caste has not been described, colony development unconfirmed, hibernation requirements may differ from typical Myrmica due to steppe habitat, wild-caught colonies may be difficult to establish due to rarity

Species Identification and Rarity

Myrmica commarginata is one of the rarest Myrmica species in the region, having been found in only seven localities since its first description in 1905. The most distinctive feature is the strongly constricted mesonotum and propodeum when viewed from the side, creating sharp ridges that merge with the outer bases of the propodeal spines. This unusual morphology separates it from all other Myrmica species. The species was originally described by Ruzsky from specimens collected in Transbaikal Province, Russia, in sandy steppe habitat. Subsequent records come from Krasnoyarski Krai, Chitinskaya and Amurskaya Provinces of Russia, and Mongolia. Due to its rarity and unusual morphology, researchers note that some specimens may have been misidentified, and the true taxonomic status may only be resolved when complete colony samples with queens and males are found. ^[1][3]

Natural Habitat and Distribution

This species inhabits steppe and dry meadow environments with sandy soil, typically at lower altitudes between 600-800 meters above sea level. In Mongolia, it has been recorded only in the Depression of the Great Lakes region. In Russia, it occurs in East Siberia including Khabarovsk, Buryatia, and Zabaikalsk areas. The species is classified as eurytopic, meaning it can tolerate a relatively wide range of environmental conditions, and has been found in both steppe and meadow formations. This is somewhat unusual as many steppe-specialized ant species have more restricted habitat requirements. ^[1][2][3]

Housing and Nesting

In their natural habitat, M. commarginata nests in sandy soil, typically under stones in steppe areas. For captive care, standard Myrmica housing arrangements work well. Test tube setups provide a simple founding chamber, while Y-tong or plaster nests work for established colonies. If using a naturalistic setup, provide sandy substrate similar to their natural steppe environment. The species appears to prefer somewhat drier conditions than forest-dwelling Myrmica, so avoid overly damp substrates. Ensure the nest has some dry areas alongside moist zones so workers can self-regulate. ^[1]

Feeding and Diet

Specific dietary studies for M. commarginata do not exist, but like other Myrmica species, they likely are omnivorous, accepting both protein sources and sugar. Offer small live prey such as fruit flies, pinhead crickets, or mealworms. Sugar water or honey can be provided as an energy source. Feed protein several times per week and keep sugar water available continuously. Remove uneaten prey after 24 hours to prevent mold.

Temperature and Seasonal Care

Myrmica species are adapted to temperate climates and require seasonal temperature changes. Keep colonies at room temperature (20-24°C) during the active season. During winter, provide a hibernation period of 3-4 months at 5-10°C. This species comes from a more continental climate than many Myrmica, so they may tolerate slightly cooler winter conditions. Place the colony in a cool basement, garage, or refrigerator during hibernation. Ensure the nest does not dry out completely during this period.

Challenges and Considerations

M. commarginata presents significant challenges for antkeepers. This species is extremely rare in the wild and in the hobby, finding a queen or colony for sale would be exceptional. Only the worker caste has been scientifically described, meaning queen morphology, colony structure, and development timeline are unknown. All care recommendations are estimates based on typical Myrmica genus behavior. If you obtain this species, expect a learning curve and be prepared to adjust care based on observed colony behavior. Document your observations carefully as they would contribute valuable knowledge to understanding this poorly-known species. ^[1]

Frequently Asked Questions

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References