myrmecophile

/mɜrˈmɛkəˌfaɪl/
noun
  1. An organism that lives in a close, often beneficial relationship with ants, typically inside or near an ant colony.
    • Myrmecophiles have evolved chemical signals that trick ants into accepting them as colony members.
    • Certain beetles are myrmecophiles that live inside ant nests and feed on ant waste.
    • The caterpillar of this butterfly is a myrmecophile, cared for by ants in exchange for a sweet liquid.
Synonyms
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