[1] Elektrithone expectata is known only from the one fossil, the holotype, specimen number SMF Be 2374, which is housed in the collections of the Senckenberg Forschungsinstitut und Naturmuseum in Frankfurt, Germany.

The specimen is preserved as an inclusion in a transparent chunk of 46 million year old Baltic amber which was deposited during the Lutetian stage of the Middle Eocene.

[2] The fossil was first studied by the paleoentomologists Vladimir N. Makarkin of the Far Eastern Branch of the Russian Academy of Sciences, Sonja Wedmann of the Senckenberg Forschungsstation, and Thomas Weiterschan of Höchst im Odenwald, Germany.

[1] The specific epithet expectata is from the Latin word meaning "expected", alluding to the anticipated find of the family in Baltic amber.

[1] The broad costal area of Elektrithone along with the strongly curved humeral veinlet, comb like MP (medial posterior) and CuA (cubitus anterior) veins and the series structure of the radial crossveins are all features seen in Ithonidae.