Aphaenogaster depressa

Quick Summary

• Difficulty: Expert
• Origin & Habitat: Endemic to Turkey, specifically the Gaziantep region in south-central Turkey ^[1][4]. The type locality sits at approximately 37°N latitude in a semi-arid continental climate zone ^[5].
• Colony Type: Unknown, only worker specimens exist in collections. Whether colonies have one queen or multiple queens is completely unconfirmed ^[3].
• Size & Growth:
  • Queen: Unknown, no queens have ever been collected.
  • Worker: Unknown, no measurements of type specimens are available in the literature.
  • Colony: Unknown, no living colonies have ever been studied.
  • Growth: Unknown
  • Development: Unknown (No development data exists for this species.)
• Antkeeping:
  • Temperature: Unknown. Based on the extratropical Turkish origin at 37°N latitude, start around 20-25°C with a gradient and observe colony response ^[5].
  • Humidity: Unknown. Provide moderate humidity with a moisture gradient, allowing the ants to choose between slightly damp and drier areas.
  • Diapause: Unknown. The temperate Palearctic origin suggests hibernation may be needed, but this remains completely unconfirmed ^[5].
  • Nesting: Unknown. Based on general Aphaenogaster patterns, soil or rotting wood setups might work, but this is purely speculative.
• Behavior: Unknown. No behavioral observations have been published for this species.
• Common Issues: no care data exists, keeping this species would be completely experimental., taxonomic uncertainty means typical Aphaenogaster care patterns may not apply., extreme rarity in collections makes acquisition nearly impossible., unknown founding behavior creates high risk of colony failure if queens were ever obtained.

Taxonomic History and Uncertainty

The story of Aphaenogaster depressa starts with Donisthorpe describing Veromessor pergandei in 1950 from Turkish specimens ^[1]. He later corrected the spelling to pergandei, but this name was already taken by another ant species, forcing Bolton to create the replacement name Aphaenogaster depressa in 1995 ^[2]. For decades, its position within the genus remained unclear. Recent morphological studies using photographs of the type specimen revealed that this species does not belong to the subterranea species group, a major group within Aphaenogaster ^[3]. Schifani and colleagues noted in 2022 that Turkish Aphaenogaster species require further investigation to clarify their positions, and this species remains one of the most problematic ^[3].

Distribution and Collection History

This species has one of the most restricted known ranges in ant taxonomy. Every known specimen comes from Gaziantep, Turkey, collected on August 25,1949 by C. Kosswig ^[1]. The five syntype workers reside in the Natural History Museum in London (BMNH) ^[2]. Despite extensive ant surveys in Turkey and surrounding regions, no one has reported this species since the original collection, suggesting it is either extremely rare, cryptic, or potentially misidentified in the field ^[4]. The type locality sits at roughly 37°N latitude, placing it in the Palearctic region with a continental climate ^[5].

Experimental Care Guidelines

No one has ever kept Aphaenogaster depressa in captivity, so any care guidelines are purely theoretical. If you obtained these ants, you would be conducting the first captive study ever. Based on the Turkish origin, treat them as a temperate species, avoid tropical heat, and consider that they might need a winter rest period. General Aphaenogaster care suggests they might accept a mix of seeds and insects, but without knowing their specific diet, founding behavior, or colony structure, success would be unlikely. This species belongs in scientific collections and research, not home formicariums, until basic biology is documented. ^[5]

Frequently Asked Questions

Report an Issue

The current care sheet is based fully on literature. See inconsistencies, or something that's incorrect? Please report here, it will be resolved after review from an admin. Contributing to the blogs tab also helps providing information, to make us be able to further improve the caresheets. Thank you for your support!

References