An endangered species is usually a taxonomic species, but may be another evolutionary significant unit.
2.
Due to a large number of taxonomic species yet to be described, complete characterization has not been possible as DRB are highly variable.
3.
A " species " under the act can be a true taxonomic species, a subspecies, or in the case of vertebrates, a " distinct population segment . " The procedures are the same for both types except with the person / organization petition, there is a 90-day screening period.
4.
"We show that although discrete phenotypic clusters exist in most [ plant ] genera ( > 80 % ), the correspondence of taxonomic species to these clusters is poor ( < 60 % ) and no different between plants and animals . . . . Contrary to conventional wisdom, plant species are more likely than animal species to represent reproductively independent lineages . " Rieseberg et al . ( 2006 ).
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