Integrated Taxonomic Information System (ITIS)

Content and components

ITIS organizes its content around a few key elements that make biological names practical for data systems. Each taxon entry typically includes a scientific name, authorship and publication details where available, a taxonomic status (for example accepted name or synonym), and a Taxonomic Serial Number (TSN) — a persistent numeric identifier used to link records across datasets. The database also records common names, vernacular variants, and references to supporting literature or expert opinions.

How the data are maintained

Information in ITIS is reviewed and curated by taxonomic specialists and institutional partners. That editorial process helps ensure names and classifications reflect current consensus or indicate alternate treatments where disagreement exists. ITIS is designed to be interoperable with other biodiversity resources and supports data exchange by providing structured records suitable for integration into larger systems and for use in automated workflows.

Uses and examples

ITIS serves multiple practical purposes. Typical uses include aligning species lists from different organizations, providing authoritative names for environmental legislation and reporting, supporting ecological and biodiversity research, and helping produce inventories for conservation planning. Agencies and projects often rely on ITIS to reconcile names when merging datasets or to supply consistent nomenclature in publications and databases.

Notable features and distinctions

• Persistent identifiers (TSNs) that reduce ambiguity when names change.
• Coverage that emphasizes reliable, curated information rather than exhaustive speculative treatments.
• Integration-friendly formats and links to supporting references and common names.

Access and further information

ITIS is accessible through online portals and web services intended for both casual lookup and programmatic queries. Readers seeking introductions to taxonomic concepts can consult general materials on taxonomy and the naming of biological species. For direct access to records and search tools, the database portal is available at ITIS database, and collections of species-level entries or download options are described at resources such as species records. When using ITIS content in reports or data products, include the recommended citation and the TSN to ensure traceability.

Note: ITIS emphasizes quality and consistency; it is one of several taxonomic resources and is often used alongside other regional or global checklists to provide the best available taxonomic treatment for a given purpose.