Issue 18336

Duplicate taxon in GBIF backbone taxonomy

Reporter: peterdesmet
Type: Feedback
Summary: Duplicate taxon in GBIF backbone taxonomy
Resolution: Fixed
Status: Closed
Created: 2016-03-22 11:57:03.958
Updated: 2016-03-22 13:13:14.01
Resolved: 2016-03-22 13:13:13.983
Description: The species {{Hyacinthoides hispanica}} appears twice in the GBIF backbone taxonomy:

* from COL, with author, synonyms and 1,979 occurrences. *Looks like the one to keep*
* from Harmonia, without author or synonyms and 779 occurrences. *Looks like the one to remove*

The two sets of occurrences don't overlap, so if you search for "Hyacinthoides hispanica", you have to select one of the two:


But the real problem (for me) is the taxon match service, which does not provide a match because of the two competing names:]]>

Created: 2016-03-22 13:11:17.819
Updated: 2016-03-22 13:11:17.819
The genus is apparently treated as a homonym in different families in the current, old nub. That leads to duplication of that species.

It is gone in the new nub preview:

Created: 2016-03-22 13:12:30.694
Updated: 2016-03-22 13:12:30.694
Also the nub matching prefers accepted taxa over doubtful or synonyms in case they have the same canonical name.
In the new nub any species homonym within a kingdom can only have one accepted name. All other must be either synonyms or are being flagged as doubtful