The group of Otiocerinae was introduced by
Frederick Muir in 1917, based on the wing venation of this group. It is named after the genus
Otiocerus Kirby, 1821, the first genus which has been described in this subfamily.
Otiocerus is found in central and eastern North America. Apart from the wing venation, the presence of a stridulation plate with a concave external margin on the hind wing is often cited as a diagnostic character for the subfamily Otiocerinae. '' (tribe
Rhotanini) with stridulation plate The forewings of Otiocerinae are typically elongated and often more than 2½ times longer than wide. The head is usually strongly compressed and extends in front of the eyes in the form of two thin plates or ridges. The
vertex often has sensory pits and the antennae can be long and branched. In addition, there is a large variety of colours and wing patterns in this subfamily (see the gallery below). ==Classification==