SELECT DISTINCT accepted_taxonlabel_descendant.descendant_id AS taxonlabel_id FROM ((taxonlabel datasource_taxonlabel JOIN taxonlabel accepted_taxonlabel ON ((accepted_taxonlabel.taxonlabel_id = datasource_taxonlabel.canon_label_id))) JOIN taxonlabel_relationship accepted_taxonlabel_descendant ON ((accepted_taxonlabel_descendant.ancestor_id = accepted_taxonlabel.taxonlabel_id))) WHERE (((datasource_taxonlabel.reference_id = reference_by_shortname('IUCN'::text)) AND (datasource_taxonlabel.taxonomicname IS NOT NULL)) AND (accepted_taxonlabel.rank >= 'species'::taxonrank));