Family (biology)
In biological classification, family (Latin: familia) is
- a taxonomic rank. Other well-known ranks are life, domain, kingdom, phylum, class, order, genus, and species, with family fitting between order and genus. As for the other well-known ranks, there is the option of an immediately lower rank, indicated by the prefix sub-: subfamily (Latin: subfamilia).
- a taxonomic unit, a taxon, in that rank. In that case the plural is families (Latin familiae)
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- Example: Walnuts and hickories belong to Juglandaceae, the walnut family.
What does and does not belong to each family is determined by a taxonomist. Similarly for the question if a particular family should be recognized at all. Often there is no exact agreement, with different taxonomists each taking a different position. There are no hard rules that a taxonomist needs to follow in describing or recognizing a family. Some taxa are accepted almost universally, while others are recognised only rarely.
Famous quotes containing the word family:
“My ambition for station was always easily controlled. If the place came to me it was welcome. But it never seemed to me worth seeking at the cost of self-respect, or independence. My family were not historic; they were well-to-do, did not hold or seek office. It was easy for me to be contented in private life. An honor was no honor to me, if obtained by my own seeking.”
—Rutherford Birchard Hayes (1822–1893)