query: PREFIX wikibase: <http://wikiba.se/ontology#>
  PREFIX wd: <http://www.wikidata.org/entity/> 
  PREFIX wdt: <http://www.wikidata.org/prop/direct/>
  PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
  
  SELECT ?item ?taxonName WHERE {
     ?item wdt:P225 ?taxonName .
     ?item wdt:P105 wd:Q68947 . #subspecies
     ?item (wdt:P171)* wd:Q14560 . # Cactaceae
     Filter(!regex(?taxonName, " subsp. "))
  }
  ORDER BY ASC(?item)