D. appendiculata
... that three partial cross veins in the wings make D. appendiculata a unique fruitfly among the more than 1500 species of Drosophila?
... that three partial <a class="mw-redirect" href="./Cross_vein" id="mwAxw" rel="mw:WikiLink" title="Cross vein">cross veins</a> in the wings make <i id="mwAx0"><b id="mwAx4"><a href="./Drosophila_appendiculata" id="mwAx8" rel="mw:WikiLink" title="Drosophila appendiculata">D. appendiculata</a></b></i> a unique fruitfly among the more than <a href="./List_of_Drosophila_species" id="mwAyA" rel="mw:WikiLink" title="List of Drosophila species">1500 species</a> of <i id="mwAyE"><a href="./Drosophila" id="mwAyI" rel="mw:WikiLink" title="Drosophila">Drosophila</a></i>?