Whippo

I hasten to point out that the molecular data sets supporting the "whippo" clade are frought with problems, many of which are currently being addressed by several high-caliber systematists, and so we may not have heard the last word on this issue.

Source: wiktionary

The whippo lineage may have developed a watery lifestyle even before the hippos and whale branches diverged.

Source: wiktionary

Molecular analyses also support a closer relationship of ‘whippos’ to ruminants than to pigs or camels (Fig. 2.9), a clade named Cetruminantia (e.g., Hassanin et al. 2012).

Source: wiktionary

As an example of this confusion, transitional forms are not to be sought between equally derived living whales and their closest living relatives, the hippos. We do not search for "whippos."

Source: wiktionary