Scientific illustration of Messor celiae ant - showing key identification features including head, thorax, and gaster.

Messor celiae

Monogynous Non-Parasitic Queen No Gamergate
Sci. Name
Messor celiae
Tribe
Stenammini
Subfamily
Myrmicinae
Author
Reyes, 1985
Distribution
Found in 1 countries

Introduction

Messor celiae is a harvester ant endemic to the Iberian Peninsula in Spain . It is a rare, native species found in southern regions like Córdoba, Seville, and Granada . This species builds diffuse nests with narrow tunnels and does not maintain visible foraging trails .

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Status by country, from Kass et al. 2022 & Wong et al. 2023

Native Invasive Introduced (indoor) Intercepted Unknown
Data Sources
Year Range 2000 - 2026

Quick Summary

  • Difficulty: Medium
  • Origin & Habitat: Iberian Peninsula, Spain, specifically southern regions around Córdoba, Seville, and Granada provinces. This species inhabits warm, open Mediterranean landscapes including olive groves and dehesa woodland. As a Heat/Open specialist, it prefers dry, sunny areas [4][5][6].
  • Colony Type: Unconfirmed, based on Messor genus patterns, likely monogyne [4].
  • Size & Growth:
    • Queen: Size data unavailable, no total length measurements in research [7][8].
    • Worker: Size data unavailable, no total length measurements in research.
    • Colony: Unknown, colony size trait not completed in research [8].
    • Growth: Moderate, inferred from Mediterranean harvester ant patterns.
    • Development: Unknown, no specific data for M. celiae. Based on genus patterns, estimated 6-10 weeks at warm temperatures. (Development time is inferred from related species.)
  • Antkeeping:
    • Temperature: Keep warm, roughly 22-26°C, based on Heat/Open specialist habitat [4].
    • Humidity: Keep nest substrate relatively dry with occasional moist patches, as this species prefers dry habitats [4].
    • Diapause: Unknown, no data on diapause requirements.
    • Nesting: Y-tong (AAC) or plaster nests work well. Provide dry nesting chambers with some moisture variation [4].
  • Behavior: Generally peaceful and non-aggressive. Workers are active foragers but may be shy and avoid bright light. Escape risk is moderate due to small size [4].
  • Common Issues: colonies are rare and difficult to acquire in the wild., dry habitat requirements mean overwatering can kill colonies., slow growth may frustrate beginners., wild-caught colonies may be stressed from habitat disturbance., queen may be hard to locate due to rarity.

Housing and Nest Setup

Messor celiae does well in Y-tong (AAC) nests or plaster formicariums designed for small Myrmicinae. Provide narrow chambers scaled to their worker size. Because they are Heat/Open specialists, the nesting area should be relatively dry with only small moisture zones. A test tube setup works for founding colonies, use a water reservoir at one end but keep the cotton dry enough that the chamber stays mostly dry. Once established, you can move them to a more elaborate setup, but avoid overly humid conditions [4].

Feeding and Diet

As harvester ants, Messor celiae primarily collects and stores seeds. Offer a variety of grass seeds, flower seeds, and small grains, they will crack open the husks to eat the nutritious insides. They also accept small insects like fruit flies, pinhead crickets, and mealworms for protein. Sugar water or honey can be offered occasionally, though seeds should form the staple diet. Unlike some Messor species that create obvious foraging trails, M. celiae workers forage more individually and may not travel far from the nest [4]. Feed seeds continuously and protein 1-2 times per week.

Temperature and Seasonal Care

Maintain temperatures between 22-26°C during the active season, based on their Heat/Open specialist habitat. These are Mediterranean natives adapted to warm, dry conditions. During winter, if diapause is needed, reduce temperature gradually, but specific data is unavailable [4]. Heating is usually not needed in summer if your room stays in the 20s, but a small heating cable on one side of the nest can create a beneficial gradient during cooler months.

Behavior and Colony Dynamics

Messor celiae is a peaceful species that tends to avoid confrontation. Workers are small and may be shy, often retreating from bright light and disturbance. Colonies grow moderately, do not expect massive worker populations. The colony structure is simple: one queen with workers that vary slightly in size. Unlike some harvester ants, they do not maintain visible pheromone trails to food sources, instead foraging more individually [4].

Finding and Acquiring

This species is considered rare and endemic to the Iberian Peninsula. It has been documented in only a few provinces: Córdoba, Seville, and Granada, primarily in olive grove and dehesa habitats [5][6]. Wild collection is difficult due to its limited range and sparse population. Your best option is to find a reputable breeder who has propagated stock from legal sources. Expect higher prices than common species due to rarity. When keeping rare species, never release specimens outdoors outside their native range, this species should remain contained in captivity [3][4].

Frequently Asked Questions

How long does it take for Messor celiae to produce first workers?

No specific data is available for M. celiae. Based on genus patterns, estimated 6-10 weeks from egg to worker at warm temperatures around 24°C.

Can I keep Messor celiae in a test tube setup?

Yes, test tubes work well for founding colonies. Use a water reservoir but keep the cotton dry enough that the chamber stays relatively dry, these are dry habitat specialists that prefer arid conditions [4].

What do Messor celiae ants eat?

They are harvester ants that primarily eat seeds, offer grass seeds, flower seeds, and small grains. They also accept small insects like fruit flies and mealworms for protein. Seeds should be available continuously [4].

Do Messor celiae ants need hibernation?

Unknown, no data on diapause requirements for this species.

Are Messor celiae good for beginners?

They are rated Medium difficulty. While not the easiest species, their straightforward care requirements make them manageable for intermediate antkeepers. Their rarity and higher cost make them less ideal as a first species [4].

How big do Messor celiae colonies get?

Unknown, colony size research is not completed for this species [8].

Do Messor celiae ants sting?

They have a stinger but are small and generally non-aggressive. They will retreat rather than attack when threatened. Stings are unlikely to penetrate human skin.

When should I move my Messor celiae to a formicarium?

Move them when the test tube is crowded or the water reservoir is depleted, typically when the colony has several workers. Use a small formicarium scaled to their modest size.

Can I keep multiple Messor celiae queens together?

No, this species is likely monogyne based on genus patterns. Only one queen per colony should be kept. Combining unrelated queens will result in fighting.

Why are my Messor celiae dying?

The most common causes are: overwatering (they need dry conditions), temperatures too cold or too hot, or stress from disturbance. Check that the nest is not too humid and temperatures are in the 22-26°C range [4].

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References

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This caresheet is licensed under CC BY-SA 4.0 .