query: SELECT ?item ?article
  WHERE
  {
      ?item wdt:P225 ?taxonName .
      ?item wdt:P910 ?itemcat .
      OPTIONAL {?item wdt:P373 ?commonscat} . 
      ?article schema:about ?itemcat .
  	?article schema:isPartOf <https://commons.wikimedia.org/> .
      FILTER (STRSTARTS(STR(?article), "https://commons.wikimedia.org/wiki/Category"))
      FILTER (!bound(?commonscat))
  }