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    • Type: Feedback Feedback
    • Status: Closed
    • Priority: Major Major
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: None
    • Component/s: occurrence
    • Labels:
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      Description

      The GBIF map for the plant genus Bartlettina http://www.gbif.org/species/3134395 is a mess.

      This genus is native to Mesoamercia and South America https://en.wikipedia.org/wiki/Bartlettina but GBIF has lots of records from Europe and Pakistan, as well as others scattered around the globe. Some of these may be introduced (Bartlettina sordida is an ornamental) but some of these records look to be incorrect.

      The European records are for Phagnalon sordidum (L.) Rchb. which GBIF somehow thinks is a synonym of Bartlettina sordida (Less.) R.M.King & H.Rob. These names don't have the same basionym, they are clearly different things.

      The records from Pakistan are for Aster molliusculus (Lindl. ex DC.) C.B.Clarke which GBIF says is a synonym of Bartlettina hemisphaerica (DC.) R.M.King & H.Rob. As far as I can tell, Aster molliusculus is a valid species found in Asia. The basionym of Bartlettina hemisphaerica is Eupatorium hemisphaericum var. molliusculum DC.

      All in all a confusing mess. It would be nice to know how this was generated, and how we can avoid these situations. Is it the lack of detailed plant name data?

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          Hide
          Roderic D. M. Page added a comment -

          Completely independently a GBIF user has commented about this same genus on iPhylo http://iphylo.blogspot.de/2013/09/the-quality-of-gbif-taxonomic.html#comment-2759357159

          I suspect this genus may be a victim of the basionym matching issue (using same species names in different genre in the same family to flag possible problems), but whatever it looks like this large family of plants (Asteraceae) has been badly mangled.

          Show
          Roderic D. M. Page added a comment - Completely independently a GBIF user has commented about this same genus on iPhylo http://iphylo.blogspot.de/2013/09/the-quality-of-gbif-taxonomic.html#comment-2759357159 I suspect this genus may be a victim of the basionym matching issue (using same species names in different genre in the same family to flag possible problems), but whatever it looks like this large family of plants (Asteraceae) has been badly mangled.
          Hide
          Markus Döring added a comment -

          The new August 2016 backbone has Phagnalon sordidum (L.) Rchb. and Aster molliusculus (Lindl. ex DC.) C.B.Clarke as accepted or doubtful taxa sitting in the genus Phagnalon and Aster respectively. Awaiting new occurrence maps to verify Bartlettina occurrences

          Show
          Markus Döring added a comment - The new August 2016 backbone has Phagnalon sordidum (L.) Rchb. and Aster molliusculus (Lindl. ex DC.) C.B.Clarke as accepted or doubtful taxa sitting in the genus Phagnalon and Aster respectively. Awaiting new occurrence maps to verify Bartlettina occurrences
          Hide
          Markus Döring added a comment - - edited

          Having reprocessed all occurrences to the new august backbone there are only 11 occurrences left in Europe: http://www.gbif-uat.org/occurrence/search?&TAXON_KEY=3134395&HAS_GEOSPATIAL_ISSUE=false&HAS_COORDINATE=true&GEOMETRY=-28.125+63.860035%2C-28.125+20.632784%2C54.84375+20.632784%2C54.84375+63.860035%2C-28.125+63.860035

          All of which are Eupatorium sordidum Less. Herbarium specimens. That seems about right: http://www.gbif.org/occurrence/767610204/verbatim

          Show
          Markus Döring added a comment - - edited Having reprocessed all occurrences to the new august backbone there are only 11 occurrences left in Europe: http://www.gbif-uat.org/occurrence/search?&TAXON_KEY=3134395&HAS_GEOSPATIAL_ISSUE=false&HAS_COORDINATE=true&GEOMETRY=-28.125+63.860035%2C-28.125+20.632784%2C54.84375+20.632784%2C54.84375+63.860035%2C-28.125+63.860035 All of which are Eupatorium sordidum Less. Herbarium specimens. That seems about right: http://www.gbif.org/occurrence/767610204/verbatim
          Hide
          Roderic D. M. Page added a comment -

          Nice! Is this based on an ad hoc fix for this example, or the result of the new nub algorithms?

          Show
          Roderic D. M. Page added a comment - Nice! Is this based on an ad hoc fix for this example, or the result of the new nub algorithms?
          Hide
          Markus Döring added a comment -

          This is the result from the less eager basionym grouping, nothing fixed specifically for this problem

          Show
          Markus Döring added a comment - This is the result from the less eager basionym grouping, nothing fixed specifically for this problem
          Hide
          Roderic D. M. Page added a comment -

          +1

          Show
          Roderic D. M. Page added a comment - +1
          Hide
          Markus Döring added a comment -
          Show
          Markus Döring added a comment - Map looks much better now: http://www.gbif-uat.org/species/3134395 The few European records are ok (see above). Then there are just some 37 Australian/New Zealand records left that might be cultivated/introduced? http://www.gbif-uat.org/occurrence/search?TAXON_KEY=3134395&HAS_GEOSPATIAL_ISSUE=false&GEOMETRY=99+-4%2C99+-49%2C180+-49%2C180+-4%2C99+-4 E.g.: http://www.gbif-uat.org/occurrence/1269410259/verbatim http://www.gbif-uat.org/occurrence/993532695/verbatim

            People

            • Assignee:
              Markus Döring
              Reporter:
              Roderic D. M. Page
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              • Created:
                Updated:
                Resolved: