Cardiocondyla verdensis

Quick Summary

• Difficulty: Unknown, newly described species with no captive husbandry data
• Origin & Habitat: Cape Verde island of Sao Nicolao (16.588°N,24.328°W) at 385m elevation. Found in a garden with trees within a semidesert landscape. This is an endemic island species that likely arrived via human introduction from Africa ^[1][2][3].
• Colony Type: Unknown, only two specimens (holotype and paratype) have ever been collected. Most Cardiocondyla species are monogyne (single queen colonies), but colony structure for C. verdensis specifically has not been documented ^[1].
• Size & Growth:
  • Queen: Unknown, queen caste has not been described or collected ^[1]
  • Worker: Workers are extremely tiny, estimated at 1.5-2mm based on Cardiocondyla genus patterns (no total length measurement available) ^[1][2]
  • Colony: Unknown, colony size has not been documented ^[1]
  • Growth: Unknown, no development data exists for this species
  • Development: Unknown, no development data exists for this species. (This is a newly described species with essentially no biological data.)
• Antkeeping:
  • Temperature: Likely prefers warm conditions similar to other Cardiocondyla species. Cape Verde has a subtropical arid climate with year-round warmth. Start around 24-28°C and observe colony activity. A gentle heat gradient allows ants to regulate their temperature ^[3].
  • Humidity: Cape Verde is semidesert to arid, so likely prefers drier conditions than many ants. Keep nest substrate moderately dry to slightly moist, with some variation available. Avoid overly damp conditions ^[3].
  • Diapause: Unknown, no seasonal data exists. Cape Verde has minimal seasonal temperature variation, so this species may not require a diapause period. Monitor for natural activity cycles ^[3].
  • Nesting: No specific nesting data exists. Related Cardiocondyla species often nest in soil, under stones, or in small cavities. A small test tube setup would be appropriate for their tiny size. The semidesert garden habitat suggests they tolerate drier conditions ^[3].
• Behavior: No behavior has been documented for this species. Cardiocondyla ants are generally active foragers that hunt small prey and may tend aphids for honeydew. They are known to be somewhat aggressive for their tiny size and have functional stingers, though the sting is too small to affect humans. Their extremely small size means escape prevention must be excellent, they can squeeze through gaps invisible to the naked eye. Use fine mesh barriers and tightly sealed setups ^[3].
• Common Issues: no captive husbandry data exists, this is one of the least-studied ant species in the hobby, extremely small size makes escape likely without proper barriers, no information on accepted foods, start with small live prey and sugar sources, colony founding may be difficult given no queen or colony specimens have ever been kept, no data on temperature tolerance or humidity preferences specific to this species

Species Discovery and Rarity

Cardiocondyla verdensis is an exceptionally rare species in both the scientific literature and the antkeeping hobby. It was only formally described in 2023 by Bernhard Seifert, making it one of the newest ant species to receive a scientific name. The entire known population consists of just two specimens, the holotype and a single paratype, both collected in 2003 from the island of Sao Nicolao in Cape Verde. This species represents an interesting case of island evolution, where a small founding population underwent genetic bottlenecking that produced extreme morphological characteristics. It has the longest head and longest antennae (scapes) of any species in the batesii group, features that distinguish it clearly from its closest relatives ^[1][2].

Why This Species Is Challenging to Keep

C. verdensis presents unique challenges for antkeepers. First, no live colonies have ever been exported or maintained in captivity, the species is known only from two museum specimens. Second, the workers are extremely tiny, making them difficult to house, feed, and observe. Third, we have no information about their queen, their founding behavior, what they eat, or how fast their colonies grow. This is essentially an unstudied species in terms of husbandry. If you obtain this species, you would be pioneering its captive care entirely through observation and experimentation rather than following established protocols ^[1].

Housing Recommendations

Given their minute size, C. verdensis requires specialized housing. A standard test tube setup would work, but ensure the cotton is packed tightly enough to prevent escape, these ants are small enough to potentially squeeze through standard cotton fibers. Alternatively, a small nest with very narrow chambers scaled to their tiny size would be appropriate. The nest should be kept at room temperature or slightly above, around 24-28°C, with low to moderate humidity reflecting their semidesert origin. Escape prevention is critical, even standard ant farm setups may have gaps too large to contain them. Use fine mesh on any ventilation holes ^[3].

Feeding and Diet

No specific feeding data exists for this species. Based on general Cardiocondyla biology, they likely function as omnivores that hunt small arthropods and collect honeydew from aphids or scale insects. Start with tiny live prey such as springtails, fruit flies, or other micro-arthropods. You might also offer sugar water or honey diluted with water, though acceptance is uncertain. Given their tiny size, any prey items must be appropriately scaled, even a fruit fly would be a significant meal for these ants. Feed small amounts frequently and remove uneaten prey to prevent mold ^[3].

Comparison to Related Species

Cardiocondyla verdensis belongs to the batesii species group, which contains several other small, dark-colored ants. Its closest known relative appears to be a dark, shiny morph of Cardiocondyla nigra, which occurs on the nearby island of Sao Vicente,50km away. Other Cardiocondyla species in the hobby include C. emeryi, C. fajumensis, and C. nigra, all of which are small, active ants that typically form colonies of a few hundred workers. However, C. verdensis is distinct in its extreme morphometric values and isolated island distribution. If you have experience with other Cardiocondyla species, use that as a starting point, but expect this species may have unique requirements ^[1][2][3].

Frequently Asked Questions

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References