High Quality Content by WIKIPEDIA articles! Xenerpestes is the genus of greytails, birds in the family Furnariidae. In biology, a genus (plural: genera) is a taxonomic unit (a taxon) used in the classification of living and fossil organisms, which is an example of definition by genus and differentia. The term comes from Latin genus "descent, family, type, gender", cognate with Greek: – genos, "race, stock, kin". The composition of a genus is determined by a taxonomist. The standards for genus classification are not strictly codified, and hence different authorities often produce different classifications for genera. In the hierarchy of the binomial classification system, genus comes above species and below family.

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