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

Procryptocerus schmitti

Non-Parasitic Queen No Gamergate
Sci. Name
Procryptocerus schmitti
Tribe
Attini
Subfamily
Myrmicinae
Author
Forel, 1901
Distribution
Found in 3 countries
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Introduction

Procryptocerus schmitti is a small ant in the fungus-growing tribe Attini. Queens are about 3.7 mm long . Workers have a flattened head and punctate facial area . The species is found in northern South America, including Brazil, Colombia, French Guiana, and Venezuela . In Colombia, it has been recorded at 980 meters elevation . This ant is very similar to Procryptocerus coriarius, with their ranges adjacent but not overlapping .

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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: Hard
  • Origin & Habitat: Tropical forests of northern South America. Found in Brazil (Bahia, Pernambuco, Ceara), Colombia (Antioquia, Caquetá), Venezuela, and French Guiana at elevations from sea level to 980m [3][4][5][6][2].
  • Colony Type: Unconfirmed, no data on colony structure.
  • Size & Growth:
    • Queen: Approximately 3.7 mm [1].
    • Worker: Unconfirmed, no measurements available.
    • Colony: Unknown, no data.
    • Growth: Unknown.
    • Development: Unknown, no studies. Based on Attini patterns, estimates suggest 6-10 weeks at warm temperatures, but this is inferred. (Development timeline is unconfirmed. Related Attini species typically take 6-8 weeks from egg to worker at warm temperatures.)
  • Antkeeping:
    • Temperature: Unknown, based on tropical distribution, aim for warm conditions around 24-28°C [2].
    • Humidity: Unknown, as a tropical species, moderate to high humidity is likely. Keep substrate moist but not waterlogged [2].
    • Diapause: Unlikely, tropical species, no diapause required [2].
    • Nesting: Unknown in captivity. In wild, typically nest in rotting wood or under bark [2]. Use Y-tong, plaster, or soil nests with moisture retention.
  • Behavior: Procryptocerus ants are generally docile and non-aggressive [2]. Workers are small and slow-moving. Escape prevention is critical due to small size. Sting is possible but mild, based on subfamily knowledge.
  • Common Issues: experimental care required due to lack of captivity history., dietary needs unstudied, feeding is guesswork., colony founding behavior unknown, survival rates unconfirmed., temperature and humidity preferences unconfirmed, monitoring needed., wild colonies difficult to obtain, limited availability.

Species Identification and Range

Procryptocerus schmitti is a distinctive species within the genus Procryptocerus, characterized by its uniformly punctate facial area and specific sculptural features. The species was originally described by Forel in 1901 from Brazil (Ceara, Baturite) [7]. It is very similar to Procryptocerus coriarius, with which it is parapatric, meaning their ranges are adjacent but don't overlap [3]. The known distribution spans Venezuela, Brazil (specifically Bahia, Pernambuco, and Ceara), Colombia (Antioquia at Cañón del Porce, and Caquetá), and French Guiana [3][4][5][6]. In Colombia, specimens have been collected at approximately 980 meters elevation [4]. The genus Procryptocerus belongs to the tribe Attini, which includes fungus-growing ants, though Procryptocerus species are not true leaf-cutters.

Morphology and Identification

Queens (gynes) of Procryptocerus schmitti measure approximately 3.7 mm in total length [1]. Several key morphological features distinguish this species: the frontovertexal margin is indistinct throughout, the vertex is flat, the frons is foveolate (pitted texture), the scape lacks a carina (ridge), and scrobiculae often border the vertex [1]. The facial area is uniformly punctate, and the major opisthogastric tergite and corresponding sternite show micropunctulation [6]. These are diagnostic features used by taxonomists to identify the species. Workers have the characteristic flattened head shape that gives Procryptocerus its name ('hidden horn' referring to the flattened antennae scapes). The notopropodeal fusion is marked by a groove when grooved [1].

Taxonomic Context

Procryptocerus schmitti belongs to the subfamily Myrmicinae and the tribe Attini. The tribe Attini is best known for the leaf-cutter ants (Atta and Acromyrmex), but also includes many other fungus-growing ant genera. Procryptocerus is considered part of the 'cryptocerine' complex of Attini, ants that have distinctive flattened heads and are not true leaf-cutters. The genus contains several dozen species distributed throughout the Neotropics. Procryptocerus schmitti was described by Forel in 1901 from specimens collected in Brazil [7]. The species has been subsequently recorded in Colombia, Venezuela, and French Guiana, but remains poorly studied compared to more common Attini species.

Keeping Procryptocerus schmitti - What We Don't Know

This is one of the most poorly documented species in the antkeeping hobby. Procryptocerus schmitti has never been kept in captivity as far as records show, and there is no established husbandry knowledge for this species. All recommendations for care must be considered experimental. Based on its tropical distribution and membership in Attini, reasonable starting points would be: warm temperatures (24-28°C), moderate to high humidity, and a diet based on fungus cultivation [2]. Nesting preferences are unconfirmed, but related species typically nest in rotting wood or under bark in forest habitats [2]. If you obtain a colony, document your observations carefully, any captive husbandry data would be scientifically valuable for this poorly known species.

Related Species and Comparison

Procryptocerus schmitti is very similar to Procryptocerus coriarius, with which it is parapatric, their distributions are separate but geographically adjacent [3]. This similarity has caused some taxonomic confusion over the years. Other Procryptocerus species in the region include P. convexus, P. falcatus, and P. attenuatus, among others. The genus as a whole is characterized by their flattened heads, distinctive sculpturing, and relatively docile behavior compared to some other Attini. Many Procryptocerus species remain poorly known, and several have never been documented alive.

Frequently Asked Questions

Can I keep Procryptocerus schmitti in a test tube?

Test tube setups are commonly used for founding colonies of many Myrmicinae, but there is no documented success with this specific species. Based on the small queen size (3.7 mm), a test tube with a water reservoir would be a reasonable starting point for a claustral founding queen, but success cannot be guaranteed as no captive husbandry history exists.

How long does it take for Procryptocerus schmitti to produce first workers?

The egg-to-worker development timeline is completely unconfirmed for this species. No scientific papers document development times, and there are no captive colony records. Based on typical Attini patterns and the small queen size, a rough estimate would be 6-10 weeks at optimal warm temperatures, but this is highly speculative.

What do Procryptocerus schmitti ants eat?

As members of the tribe Attini (fungus-growing ants), they likely cultivate fungus as their primary food source, similar to other Attini [2]. The specific fungi they cultivate is unknown. In captivity, offering small amounts of organic matter (fruit, dead insects, fungal substrates) would be experimental. Sugar sources may or may not be accepted, this is unstudied.

Are Procryptocerus schmitti good for beginners?

No. This species has never been documented in the antkeeping hobby and has no established care protocols. All aspects of husbandry would be experimental. Beginners should start with well-documented species like Lasius niger, Camponotus species, or Tetramorium species that have extensive captive breeding history.

Where can I find Procryptocerus schmitti in the wild?

The species is found in Brazil (Bahia, Pernambuco, Ceara), Colombia (Antioquia, Caquetá), Venezuela, and French Guiana. In Colombia, they've been found at approximately 980m elevation in the Cañón del Porce region [4]. They are typically found in tropical forest habitats, often nesting in rotting wood or under bark.

Do Procryptocerus schmitti need hibernation?

Unlikely. As a tropical species from northern South America, year-round activity is expected. No documented diapause or hibernation requirement exists. Keeping them at warm, stable temperatures (24-28°C) year-round is likely appropriate.

How big do Procryptocerus schmitti colonies get?

Colony size is unknown, no colony size data exists for this species in scientific literature. Based on related Procryptocerus species, colonies likely reach several hundred workers at maximum, not approaching the massive sizes seen in true leaf-cutter ants (Atta).

Can I keep multiple Procryptocerus schmitti queens together?

The colony structure (monogyne vs polygyne) is unconfirmed. No research documents whether multiple queens can found colonies together (pleometrosis) or whether established colonies accept additional queens. Combining unrelated queens is not recommended due to lack of data.

What is the best nest type for Procryptocerus schmitti?

Nesting preferences are unconfirmed. Based on typical Procryptocerus behavior and related Attini species, a naturalistic setup with rotting wood pieces or a moist Y-tong/plaster nest would be reasonable starting points. The key is providing a dark, humid, concealed space suitable for their cryptobiotic lifestyle.

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References

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