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Nom5Homonymy  
Problems facing biodiversity data indexers regarding homonyms (same name used for different taxa)
Updated Aug 18, 2009 by dprem...@gmail.com

Introduction

GBIF data sources provide occurrence data for specimens in the genus Oenanthe. In addition, two sources refer to Oenanthe as a family while one refers to it as a family and a genus. How many Oenanthe should there be?

Kingdom Phylum Class Order Family Genus
Plantae---Oenanthe
AnimaliaChordataAvesPasseriformesMuscicapidaeOenanthe
PlantaeMagnoliophytaMagnoliopsidaApialesApiaceaeOenanthe
Plantae--- Oenanthe Oenanthe
PlantaeMagnoliophytaMagnoliopsidaApialesUmbelliferaeOenanthe
AnimaliaChordataAvesPasseriformesTurdidaeOenanthe
PlantaeSpermatophyta--OrchidaceaeOenanthe

Remediation Approachs

Comment by trees...@gmail.com, Sep 14, 2009

Answer according to IRMNG is 2 - or three if you want to include a nomen nudum (Oenanthe Pallas, 1771, in Aves): (1) Oenanthe Vieillot, 1816 in Aves (Passeriformes, Muscicapidae - previously in Turdidae), and (2) Oenanthe Linnaeus, 1753 in Magnoliophyta (Apiales, Apiaceae - syn. Umbelliferae).

There is no Oenanthe in Orchidaceae, or anything close; I would flag this as a suspect name to be checked with the data supplier.

Because there is only one instance in Plantae, it is probably safe to assume all instances of "family=Oenanthe" in kingdom Plantae to be Oenanthe in Apiaceae...

This example solution requires working directly from the genus names and looking for possible homonyms (only 2 known in this instance), however will fail if not all actual homonyms are yet known. An alternative would be to examine the families for known synonyms / reallocations and do the reconciliation via this process - but knowledge of potential homonyms is still the key. Main question being, how much of this can be automated, how much requires manual inspection?

- Tony Rees


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