query: # A Robert Brown taxon without image
  SELECT ?item ?itemLabel ?image
  WHERE {
    ?item wdt:P225 ?taxon.
    ?taxon pq:P405 wd:Q21392387.
     #?taxon pq:P405 wd:Q155764.         
    FILTER NOT EXISTS {?taxon wdt:P18 ?image} .
    SERVICE wikibase:label { bd:serviceParam wikibase:language "en" }
  }
  ORDER BY ?itemLabel ?item 