Genetic and morphological evidence suggests more species should be recognized.

However, recent genetic and morphological evidence suggests that the red wolf is a unique taxon.

This proposed classification is based on molecular studies only, and there is no morphological evidence for it.

However, some morphological evidence suggests they may be related to bandicoots.

Their hypothesis is supported by both molecular and morphological evidence.

However, the morphological evidence remains difficult to reconcile with the gnepine hypothesis.

However, there is no morphological evidence nor examples from the fossil record to support the gnetophyte-sister hypotheses.

The species split was based on genetic and morphological evidence.

Some researchers have suggested they are the same species, but morphological and life-history evidence shows otherwise.

But the morphological evidence upon which the two species were differentiated was slim - a single bone in the skull.