query: SELECT ?item ?taxonName ?sitelink WHERE {
  	?item wdt:P225 ?taxonName .
      ?item wdt:P105 wd:Q7432 . # species
      OPTIONAL {?sitelink schema:about ?item} .
      OPTIONAL {?item wdt:P171 ?parent} .
      FILTER (!bound(?parent) && !bound(?sitelink))
  }
  ORDER BY ASC(?taxonName)