Anergates

Forel, 1874

Anergates is a of containing the single Anergates atratulus, an extreme workerless . The species lacks a and depends entirely on colonies of Tetramorium ants for survival and . It is listed on the IUCN Red List of threatened species.

Anergates atratulus casent0003228 head 1 by wikipedia. Used under a CC BY 4.0 license.

Anergates atratulus casent0010835 dorsal 1 by April Nobile. Used under a CC BY 4.0 license.

Pronunciation

How to pronounce Anergates: /ænˈɜː.ɡə.tiːz/

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Identification

Anergates atratulus can be distinguished from its Tetramorium by its reduced associated with workerlessness: smaller size, reduced , and simplified body structure typical of . and males are the only present.

Images

Habitat

Occurs within nests of in the Tetramorium; specific preferences are those of its hosts.

Distribution

Locally distributed throughout large parts of the ranges of its Tetramorium . New distribution records continue to be documented. Documented from Bulgaria, Turkey, and other regions where host species occur.

Host Associations

Tetramorium caespitum - Primary ; laboratory incorporation attempts with queenless colonies failed, with killing A. atratulus
Tetramorium staerckei - Identified as new through integrative morphometric and COI gene analysis
Tetramorium moravicum - Confirmed in Bulgaria
Tetramorium chefketi - Confirmed in Bulgaria and Turkey; belongs to T. chefketi rather than typical T. caespitum/imprum complex
Strongylognathus testaceus - competitorNot a ; laboratory experiments showed killed A. atratulus , indicating competitive or antagonistic interaction

Behavior

exhibit female-female competition for males, a observed in laboratory nests. Incorporation into colonies involves infiltration attempts; however, laboratory observations with queenless colony fragments of Tetramorium caespitum resulted in aggression and gyne mortality.

Ecological Role

Extreme workerless ; dependent on colony resources for survival and without contributing labor.

Human Relevance

Listed on the IUCN Red List of threatened ; considered rare.

Similar Taxa

Tetramorium ; Anergates occurs within Tetramorium nests and resembles host in general form but differs in reduced parasitic and absence of

More Details

Taxonomic Note

Anergates was established by Forel in 1874. Some sources list it as a synonym of Tetramorium, but GBIF and other taxonomic databases currently recognize it as an accepted . The Catalogue of Life lists it as a synonym, reflecting ongoing taxonomic debate.

Laboratory vs. Field Behavior

Failed incorporation experiments were conducted with queenless colony fragments only, not established queenright colonies; field may differ. Female-female competition behavior was observed in laboratory nests and may not represent complete natural behavioral repertoire.

Host Range Expansion

Recent studies have expanded known range from the typical Tetramorium caespitum/imprum complex to include the T. chefketi (T. moravicum, T. chefketi), suggesting broader host plasticity than previously recognized.