(2) In relationship-testing, would a falsificationist be "more likely [to] be interested by the rejection of impossible groupings, underlining what can not be a natural group"?
I don't think this is a natural group.
However, molecular studies have shown that these, along with the traditional Cupressaceae, form a single natural group.
Originally thought to be a natural group, Ceratosauria, as traditionally constituted, may represent a more general grouping of basal theropods, including the ancestral stock of most later theropods.
Like the living members of Chondrostei, order Palaeonisciformes is not a natural group but rather a series of families connected by interrelationships that are poorly understood.
This uncertainty persisted for a century thereafter, but it is now understood that the two groups share unique features that indeed make the Dinosauria a natural group.
Protozoans do not, therefore, form a natural group but with algae form a eukaryotic kingdom separate from plants and animals, called Protista.
Of the phasianids, the New World quail are genetically the most divergent natural group, whereas the turkeys are simply large pheasants.
Subclass Chondrostei is not a natural group, since the acipenseriforms are genealogically more closely related to the Holostei than they are to the polypteriforms; however, acipenseriforms and polypteriforms are kept together for convenience.
The result damaged the upper left natural group.
Plesiosaurs are the most derived clade (natural group) of eosauropterygians (Fig. 3).
