Feathers

I was reading this:
Although feathers have never been found in association with Utahraptor
specimens, there is strong phylogenetic evidence suggesting that all
dromaeosaurids possessed them. This evidence comes from phylogenetic
bracketing, which allows paleontologists to infer traits that exist in
a clade based on the existence of that trait in a more basal form. The
genus Microraptor is one of the oldest known dromaeosaurids, and is
phylogenetically more primitive than Utahraptor.[6] Since Microraptor
possessed feathers, it is reasonable to assume that this trait was
present in all of Dromaeosauridae. Feathers were very unlikely to have
evolved more than once in dromaeosaurids, so assuming that Utahraptor
lacked feathers would require positive evidence that they did not have
them.[7] So far, there is nothing to suggest that feathers were lost
in larger, more derived species of dromaeosaurs.[8]
http://en.wikipedia.org/wiki/Utahraptor

After feathers evolved have there been birds/dinos that no longer have
them?

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Relevant Pages

  • Re: Feathers
    ... Although feathers have never been found in association with Utahraptor ... This evidence comes from phylogenetic ... genus Microraptor is one of the oldest known dromaeosaurids, ...
    (talk.origins)
  • Re: Feathers
    ... Although feathers have never been found in association with Utahraptor ... This evidence comes from phylogenetic ... genus Microraptor is one of the oldest known dromaeosaurids, ...
    (talk.origins)
  • Re: Feathers
    ... Although feathers have never been found in association with Utahraptor ... This evidence comes from phylogenetic ... genus Microraptor is one of the oldest known dromaeosaurids, ...
    (talk.origins)
  • Re: Feathers
    ... Although feathers have never been found in association with Utahraptor ... This evidence comes from phylogenetic ... genus Microraptor is one of the oldest known dromaeosaurids, ... heat but birds never went that route. ...
    (talk.origins)
  • Re: Feathers
    ... Although feathers have never been found in association with Utahraptor ... This evidence comes from phylogenetic ... genus Microraptor is one of the oldest known dromaeosaurids, ... heat but birds never went that route. ...
    (talk.origins)