Retrieve all taxa names or TSNs downstream in hierarchy from given TSN.

Retrieve all taxa names or TSNs downstream in hierarchy from given TSN.

Usage

itis_downstream(id, downto, intermediate = FALSE, tsns = NULL, ...)

Arguments

id

A taxonomic serial number.

downto

The taxonomic level you want to go down to. See examples below. The taxonomic level IS case sensitive, and you do have to spell it correctly. See data(rank_ref) for spelling.

intermediate

(logical) If TRUE, return a list of length two with target taxon rank names, with additional list of data.frame's of intermediate taxonomic groups. Default: FALSE

tsns

Deprecated, see id

...

Further args passed on to ritis::rank_name() and ritis::hierarchy_down()

Value

Data.frame of taxonomic information downstream to family from e.g., Order, Class, etc., or if intermediated=TRUE, list of length two, with target taxon rank names, and intermediate names.

Examples

if (FALSE) {
## the plant class Bangiophyceae, tsn 846509
itis_downstream(id = 846509, downto="genus")
itis_downstream(id = 846509, downto="genus", intermediate=TRUE)

# get families downstream from Acridoidea
itis_downstream(id = 650497, "family")
## here, intermediate leads to the same result as the target
itis_downstream(id = 650497, "family", intermediate=TRUE)

# get species downstream from Ursus
itis_downstream(id = 180541, "species")

# get orders down from the Division Rhodophyta (red algae)
itis_downstream(id = 660046, "order")
itis_downstream(id = 660046, "order", intermediate=TRUE)

# get tribes down from the family Apidae
itis_downstream(id = 154394, downto="tribe")
itis_downstream(id = 154394, downto="tribe", intermediate=TRUE)
}