epitype

Noun

 * 1)  An additional, clarifying type (specimen or illustration) of a species or lower-order taxon, provided when the holotype and paratypes from the original classification are demonstrably ambiguous or insufficient.
 * 2)  An epigenetic alteration in a gene.
 * 1)  An epigenetic alteration in a gene.
 * 1)  An epigenetic alteration in a gene.
 * 1)  An epigenetic alteration in a gene.

Related terms

 * epitypification
 * epitypify