What Is Taxonomic Data and How Do You Use It to Verify Scientific Names?
Taxonomic data is the structured record of scientific names, common names, taxonomic ranks, and the relationships between organisms. You use it to confirm that a name is valid, see where a species sits in the classification hierarchy, and trace synonyms when names change. The Integrated Taxonomic Information System (ITIS) is one authoritative source: it assembles names and relationships for all seven kingdoms of life with international specialist partners and distributes that data openly. Use it when you need a citable, cross-referenced name rather than a casual search result.
What taxonomic data actually contains
A taxonomic record is more than a name. In ITIS, each record carries:
- Scientific name — the accepted Latin binomial or other rank name.
- Common name — vernacular names, tracked separately from scientific names.
- Taxonomic Serial Number (TSN) — a stable identifier ITIS assigns to a taxon, so you can reference it even if surrounding data changes.
- Rank and hierarchy — kingdom, phylum, class, order, family, genus, species, and intermediate ranks.
- Relationships — parent taxa, children, and synonymy (alternate names linked to the accepted one).
ITIS covers Archaea, Bacteria, Protozoa, Chromista, Fungi, Plantae, and Animalia. It is an Associate Participant of GBIF and contributes to the Catalogue of Life and ChecklistBank, which form the GBIF Backbone Taxonomy — so data you pull from ITIS often propagates into wider biodiversity infrastructure.
Where authoritative taxonomic data comes from
Not all name lists are equal. Curated databases differ from scraped or user-generated ones in how they handle review and updates.
| Source type | How names get in | Strength | Watch for |
|---|---|---|---|
| Curated global database (e.g., ITIS) | Specialist partners under memorandum of understanding; continuous revision | Citable, versioned, cross-linked to GBIF/COL | Coverage varies by group; check the last-updated date |
| Regional or taxon-specific checklist | Single expert or institution | Deep detail for one group or region | Narrow scope; may lag global consensus |
| Aggregator/backbone (e.g., GBIF Backbone) | Assembles multiple checklists | Broad coverage, good for indexing | Name resolution may pick one of several competing treatments |
ITIS states its mission as communicating a comprehensive taxonomy so biodiversity information can be discovered, indexed, and connected. That framing matters: the value is in the links between names, not just the list.
How to look up a species and its TSN
On itis.gov, the quick search accepts several input types. You choose the field and then the kingdom scope.
- Pick what you're searching by — Any Name or TSN, Common Name, Scientific Name, or TSN.
- Set the kingdom filter — Animal, Plant, Fungal, Bacteria, Protozoa, Chromista, or Archaea. You can also search across "every" kingdom.
- Choose the match mode — exactly, for containing, starting with, or ending with.
- Run the search and open the result to see the full record.
Expected result: a taxon page showing the accepted scientific name, its TSN, common names, and the classification path. Note that ITIS search requires JavaScript, so enable it or use Advanced Search if the quick search doesn't respond.
If you already have a TSN, searching by TSN is the most precise route — it bypasses spelling variants entirely.
Reading a taxonomic classification report
A classification report shows the hierarchy from the top down to your taxon. Read it as a path, not a list:
- Start at Kingdom and move down through phylum, class, order, family, genus, and species.
- Each level is a parent of the one below it; the report is showing you the lineage.
- Synonym entries appear alongside the accepted name. If your source used an older name, the report tells you what it maps to now.
The practical use: if a paper, label, or dataset gives you a name, walk the hierarchy to confirm you're looking at the same organism and not a homonym in a different kingdom.
Citing, linking, and downloading the data
ITIS provides defined routes for reuse:
- Citing — the site has a dedicated "How to cite ITIS" page; follow it rather than inventing a citation format.
- Linking — a "How do I link to ITIS?" page describes how to reference records from your own site or application.
- Tools — Advanced Search, Web Services (including Solr web services with examples), Hierarchical Report, and Compare Names.
- Bulk data — Full Database Download, with instructions and files also available in TWB format.
- Contributing — organizations can become a data partner and use the Taxonomic Workbench.
For applications, the web services are the intended integration path; for one-off research, the download files or Advanced Search are simpler.
Common pitfalls when verifying names
- Synonymy — the name you have may be a synonym. Always check whether the record points to a different accepted name.
- Name changes — classifications are revised. A name valid in an older paper may now be split, merged, or reassigned.
- Currency — check the last-updated date on the record or dataset. ITIS publishes new and edited names continuously and posts monthly export figures, so a stale local copy drifts from the source.
- Scope mismatch — a name may exist in ITIS but your region or taxon of interest may be covered more deeply elsewhere.
- Homonyms — the same name string can appear in different kingdoms; the kingdom filter and TSN prevent confusion.
A workable rule: verify against a curated source, record the TSN alongside the name, and note the date you checked. That combination lets anyone reproduce your identification later.