Taxa with same basionym

== Taxonomy tester - taxa with same basionym

This test asks whether there are multiple taxa with the same basionym. Logically this should not occur.

This example uses the legume genrra Poissonia and Coursetia.


//hide
//setup
//output
[source,cypher]
----
CREATE 
// taxa
(gbif2933915:taxon { name:"Poissonia", rank:"GENUS", uninomial:"Poissonia", authorship:"Baillon, 1870", accordingTo:"IRMNG Homonym List", hasParentheses:"false", year:"1870"}),
(gbif2933915)-[:HASPARENT]->(gbif5386),
(gbif5630483:taxon { name:"Poissonia weberbaueri", rank:"SPECIES", genusPart:"Poissonia", epithet:"weberbaueri", authorship:"Lavin (Harms)", accordingTo:"International Plant Names Index", hasParentheses:"false"}),
(gbif5630483)-[:HASPARENT]->(gbif2933915),
(gbif5629609:taxon { name:"Poissonia heterantha", rank:"SPECIES", genusPart:"Poissonia", epithet:"heterantha", authorship:"Lavin (Griseb.)", accordingTo:"International Plant Names Index", hasParentheses:"false"}),
(gbif5629609)-[:HASPARENT]->(gbif2933915),

// Coursetia
(gbif2959244:taxon { name:"Coursetia", rank:"GENUS", uninomial:"Coursetia", authorship:"DC.", accordingTo:"The Catalogue of Life, 3rd January 2011", hasParentheses:"false"}),
(gbif2959244)-[:HASPARENT]->(gbif5386),
(gbif2959395:taxon { name:"Coursetia heterantha", rank:"SPECIES", genusPart:"Coursetia", epithet:"heterantha", authorship:"Lavin (Griseb.)", accordingTo:"The Catalogue of Life, 3rd January 2011", hasParentheses:"false"}),
(gbif2959395)-[:HASPARENT]->(gbif2959244),

(gbif2959402:taxon { name:"Coursetia weberbaueri", rank:"SPECIES", genusPart:"Coursetia", epithet:"weberbaueri", authorship:"Harms", accordingTo:"The Catalogue of Life, 3rd January 2011", hasParentheses:"false"}),
(gbif2959402)-[:HASPARENT]->(gbif2959244),



// taxonomic names
(ipni20012728_1:taxonName { name:"Poissonia heterantha"}),
(ipni520610_1:taxonName { name:"Tephrosia heterantha"}),
(ipni944651_1:taxonName { name:"Coursetia heterantha"}),
(ipni275207_2:taxonName { name:"Coursetia heterantha"}),

(ipni20012729_1:taxonName { name:"Poissonia weberbaueri"}),
(ipni487377_1:taxonName { name:"Coursetia weberbaueri"}),


// nomenclatural synonyms
(ipni20012728_1)-[:hasBasionym]->(ipni520610_1),
// self loop
(ipni520610_1)-[:hasBasionym]->(ipni520610_1),
(ipni944651_1)-[:hasBasionym]->(ipni520610_1),
(ipni20012729_1)-[:hasBasionym]->(ipni487377_1),
// self loop
(ipni487377_1)-[:hasBasionym]->(ipni487377_1),



// taxa to names 
// Poissonia heterantha
(gbif5629609)-[:hasName]->(ipni20012728_1),
(gbif2959395)-[:hasName]->(ipni275207_2),

// Poissonia weberbaueri
(gbif5630483)-[:hasName]->(ipni20012729_1),

// Coursetia weberbaueri
(gbif2959402)-[:hasName]->(ipni487377_1),


// add this manually because IPNI has two records for Coursetia heterantha, and GBIF has mapped to the "wrong one" (sigh)
(gbif2959395)-[:hasName]->(ipni944651_1)
----

// graph

== Test that no taxa have same basionym

This next query should return an empty result 

[source,cypher]
----
match (taxon1)-[:hasName]->(name1)-[:hasBasionym]->(basionym) ,
(taxon2)-[:hasName]->(name2)-[:hasBasionym]->(basionym) 
return taxon1.name, taxon2.name, name1.name, name2.name, basionym.name
----

//table

The query is not empty, so we have a problem. In this example, the taxa Poissonia heterantha and Poissonia weberbaueri are objective synonyms of Coursetia heterantha and Coursetia weberbaueri, so GBIF should have one or other of these taxa, but not both.