epitypes

Noun

epitype (plural epitypes)

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.
   • It is clear, therefore, where any epitype, selected as an interpretive type, should be sought. The selection of an epitype, in the absence of type or authentic material, would be important, for any further molecular work will need to have available a culture of the type species of the genus which...2000, G.-S. Seo, P. M. Kirk, “1: Ganodermataceae: Nomenclature and Classification”, in J. Flood, P. D. Bridge, M. Holderness, editors, Ganoderma Diseases of Perennial Crops, CABI Publishing, page 4
2. (epigenetics) An epigenetic alteration in a gene.
   • To test this hypothesis our discussion is focused on finding evidence for gene-specific epitypes that supports or rejects cause-and-effect relationships between genotype, epitype and phenotype.[…]The first approach (A) examines the penetrance of transgenerationally inherited epitypes that are known...2013, Kasirajan Ayyanathan, Epigenetics and Pathology: Exploring Connections Between Genetic Mechanisms, Taylor & Francis (CRC Press), page 284