Evidence for this discovery? And why are they wrong? Can you look through the history of language and clearly point out when the first Latin speaker became the first Italian speaker?
Wow!! Talk about major category errors. Transitional: in between two sages one leading into the other; to transition, a movement, passage, or change from one position, state, stage,subject, concept, etc., TO ANOTHER.
Now some modern Evolutionary Biologists seeing this problem with excuses like Archae or Tiltaalik (tetrapods already existed long before Tilt) have slowly tried to change the meaning of this commonly understood word to include when something has anatomical characteristics SIMILAR to both creatures, but homology is NOT science, it is a way humans intelligently classify.
a) similarity does not necessitate a linear relationship
b) because two things share characteristics in common does not mean one came from the other (they just have genes that produce these forms in each of the two separate creatures)
For ProtoAvis evidence try...
"Cranial anatomy and relationships of a new Triassic bird from Texas."
Philosophical Transactions of the Royal Society B: Biological Sciences,
332: 277-342, OR
The Origin and Evolution of Birds (2nd ed.), A. Feduccia (1999), Yale University Press, New Haven, OR
"Skull of
Protoavis and Early Evolution of Birds."
Journal of Vertebrate Paleontology,
7(3)(Suppl.): 14A
Or more simply just google it