Table 3.

Some useful Entrez queries

all [filter]	Retrieves everthing
Specified [property]	Formal binomial and trinomial
at or below species level [property]
family [rank]	Rank-based query
taxonomy genome [filter]	Taxa with a direct link to a genome sequence
2009/10/21:2020 [date]	Date-bounded query
mammalia [subtree]	All taxa within the Mammalia
extinct [property]	Extinct organisms
Terminal [property]	Terminal nodes in the tree
loprovencyclife [filter]	Entries with LinkOut links to the Encyclopedia of Life

These can be combined in Boolean expressions, e.g. mammalia [subtree] AND specified [prop] AND subspecies [rank] AND 2009 [date].