EOL Get Hierarchy Entry

Get taxonomy hierarchy (classification tree) for a species from a specific classification system in the Encyclopedia of Life. Returns ancestors (full lineage from root to species), children taxa, synonyms, and source classification (NCBI, GBIF, ITIS, Catalogue of Life). Use EOL_get_page first to find hierarchy_entry_id values from the classifications list. Example: 70872770 is the NCBI hierarchy entry for Homo sapiens, showing the complete lineage from root through Primates to species level.