Very fast scientific name checker is out.

There are millions of checklists in use by scientists and nature enthusiasts. Very often, such lists contain misspellings or outdated names. To help researchers clean up their checklists and monitor their quality, we are releasing GNverifier v0.3.0 written in Go language.

GNverivier code follows Semantic Versioning practices. So users need to be aware that for versiong 0.x.x backward incompatible changes might happen.

We released several implementations of name-verification (reconciliation/resolution) before. All of them did not have enough speed for verifying massive lists of scientific names. This release provides from 10x to 100x throughput improvements compared to older implementations.


GNverifier can help to answer the following questions:

  • Is a name-string a real name?
  • Is it spelled correctly, and if not, what might be the correct spelling?
  • Is the name currently in use?
  • If it is a synonym, what data sources consider to be currently accepted names?
  • Is a name a homonym?
  • What is a taxon that the name points to, and where is it placed in various classifications?

Name verification and reconciliation involves several steps.

  • Exact match: input name matches canonical form located in one or more data-sources.
  • Fuzzy match: if no exact match is found, there is a fuzzy matching of canonical forms
  • Partial Exact match: if the previous two steps failed, we remove words from the end or from the middle of a name and try to match what is left until we end up with a bare genus.
  • Partial Fuzzy match: in case if the partial exact match did not work, and the remained name is not uninomial, we apply fuzzy matching algorithms.

A scoring algorithm then sorts matched results. The “About” page contains more detailed information about matching and scoring.


We observe speeds of ~2,500 names per second for checklists that are coming from optical character recognition process and contain many misspellings.


The simplest way to use GNverifier is via web-interface. The online application emits results in HTML, CSV and JSON formats and can process up to 5000 names per request.

For larger datasets, and as an alternative, there is a command line application that can be downloaded for Windows, Mac, and Linux.

gnverifier file-with-names.txt

This version adds an option -c or --capitalize to fix name-strings’ capitalization before verification. It is beneficial for web-interface, as it allows users “to be lazy” when they try to match names.

$ gnverifier "drsophila melanogaster" -c -f pretty
INFO[0000] Using config file: /home/dimus/.config/gnverifier.yaml.
  "inputId": "b20a7c40-f593-5a68-a048-0a24742b4283",
  "input": "drsophila melanogaster",
  "inputCapitalized": true,
  "matchType": "Fuzzy",
  "bestResult": {
    "dataSourceId": 1,
    "dataSourceTitleShort": "Catalogue of Life",
    "curation": "Curated",
    "recordId": "2586298",
    "localId": "69bbaee49e7c2f749ee7712f3f168920",
    "outlink": "",
    "entryDate": "2020-06-15",
    "matchedName": "Drosophila melanogaster Meigen, 1830",
    "matchedCardinality": 2,
    "matchedCanonicalSimple": "Drosophila melanogaster",
    "matchedCanonicalFull": "Drosophila melanogaster",
    "currentRecordId": "2586298",
    "currentName": "Drosophila melanogaster Meigen, 1830",
    "currentCardinality": 2,
    "currentCanonicalSimple": "Drosophila melanogaster",
    "currentCanonicalFull": "Drosophila melanogaster",
    "isSynonym": false,
    "classificationPath": "Animalia|Arthropoda|Insecta|Diptera|Drosophilidae|Drosophila|Drosophila melanogaster",
    "classificationRanks": "kingdom|phylum|class|order|family|genus|species",
    "classificationIds": "3939792|3940206|3940214|3946159|3946225|4031785|2586298",
    "editDistance": 1,
    "stemEditDistance": 1,
    "matchType": "Fuzzy"
  "dataSourcesNum": 28,
  "curation": "Curated"

It is possible to map a checklist to one of 100+ data sources aggregated in GNverifier.

The following command will match all names from file-with-names.txt against the Catalogue of Life.

gnverifier file-with-names.txt -s 1 -o -f pretty

It is also possible to run web-interface locally by running:

gnverifier -p 4000

After running the command above, the interface can be accessed by a browser via http://localhost:4000 URL.

One can find a complete list of gnverifier by running:

gnverifier -h

Application Programming Interface (API)

GNverifier does not keep all the data needed for processing name-strings locally. It uses a remote API located at

The RESTful API is public. It has an OpenAPI description and is available for external scripts.

Deprecation of old systems

There are several older approaches to solve the same problem:

If you use any of these, consider switching to GNverifier because older systems will eventually be deprecated and stopped.