|Quilled Fast Biters|
Unknown, likely Males
| "You are a Spiketail, so we will call you 'Spike'."
The subject(s) detailed in this article has/have been given a conjectural (and, as a result, unofficial) name, due to the lack of an official name for the article subject(s) to be referred to by.
A duo of "Quilled Fastbiters" (Dromaeosaurus) appear during the opening narration of The Land Before Time III: The Time of the Great Giving, wherein they are depicted fighting a Chasmosaurus.
After a pack of Ornitholestes are shown running past a waterfall, a blue dromaeosaur that looks simiar in appearance to them is shown moving around a lone Chasmosaurus, and corners it. Immediately to the left, a dull green individual is shown snarling and leaping at its prey as the scene fades out. The outcome of the battle is unknown.