It is a single complete adult female preserved as an inclusion in a specimen of clear orange amber.

The etymology of the specific name electrus is a derivation of the Latin word "electrum" meaning amber.

[1] When Diochus electrus was described, it was the first definitive species of the rove beetle subfamily Staphylininae to be described from the fossil record.

[1] The Baltic amber species Bembicidiodes inaequicollis, described by L. W. Schaufuss in 1888, was formerly considered part of Staphylininae.

[1] The Diochus electrus type specimen is a well preserved fully complete female with a total body length of 3.5 millimetres (0.14 in).