P. phagia is a terrible thing, and these poor afflicted deinonychosaurs need support and encouragement rather than ridicule.
In increasingly rare instances, P. phagia has been known to mutate to several different genera and species, all of which cause horrible physical deficiencies for the affected animals. Known variations of this terrible, terrible parasite include:
Primaropteryx wristattachia: this variation somehow detaches the primaries from the phalange, leaving them dangling from the wrist.
Remigopteryx phagia: this variation is known to totally consume the arm feathers of a deinonychosaur.
Pronatowrist breakius: This especially dangerous parasite actually deforms the arms by bending the wrists into unnatural positions. Is very painful for the animal.
Jurassopark completefuckupius: Too terrible to describe here.