query: SELECT ?taxon ?taxonName ?taxonLabel ?taxonCommonName
  WHERE
  {
    ?taxon wdt:P31/wdt:P279* wd:Q16521;
           wdt:P225 ?taxonName.
    FILTER(STRENDS(?taxonName, "unicornis")).
    OPTIONAL { ?taxon wdt:P1843 ?taxonCommonName. }
    SERVICE wikibase:label { bd:serviceParam wikibase:language "en". }
  }
  ORDER BY ?taxonName