Triaxomasia caprimulgella is a moth of the family Tineidae. It found in most of Europe, except Ireland, Luxembourg, Spain, Finland, the Baltic region, and the central part of the Balkan Peninsula. : Global Taxonomic Database of Tineidae (Lepidoptera)Fauna Europaea

The wingspan is 9–11 mm. The forewings are brown, with an indistinct yellowish fascia a little before the middle, a triangular yellowish spot on the inner margin towards the anal angle and three smaller yellowish spots on the costa. The hindwings are purplish.STAINTON, H. T. (1851): A supplementary catalogue of the British Tineidæ & Pterophoridæ. i-iv, 1-28 [Überschrift Seite 15: Appendix. A catalogue of the Tineidæ obtained from Herr Joseph Mann, of Vienna, in 1849]. London

The larvae possibly feed on rotting wood or possibly dead insects.microlepidoptera.nl

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