The following parameters can be used to retrieve measurements from
a known list of specimens, occurrences, or collections. Only the
records matching all specified parameters will be returned:
spec_id: A list of specimen identifiers.
occ_id: A list of occurrence identifiers.
coll_id: A list of collection identifiers.
It is possible to return additional information along with the
basic record with the following parameter:
show: Possible values include:
"spec": Includes all of the core fields describing the
specimen from which this measurement was taken.
"methods": Information about the collection methods used.
See the pbdb_occurrences() documentation for an explanation about
more filtering parameters.