shared derived character造句

Therefore, neither of these states can supply a uniquely shared derived character which would support a'prototherian'grouping of orders in contradistinction to Theria ( Kemp 1983 ).
This view has now been overturned after the recognition that Pitcairnioideae as originally circumscribed more than a century ago represents several morphologically similar but independently derived groups that share only ancestral ( plesiomorphic ) characters, not true synapomorphies ( shared derived characters ).
Using shared derived characters, an early attempt in the 1970s used strict parsimony to determine the three long-necked genera ( " Chelodina ", " Chelus ", and " Hydromedusa " ) were each other's closest relatives.
It's difficult to find shared derived character in a sentence. 用shared derived character造句挺难的