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"My Name is Elmer Fudd, Millionaire. I own a Mansion and a Yacht."
Psychiatrist: "Again."

• It did not first appear in Star Trek: The Next Generation.
  
• It did not appear in more than one episode/movie.
  
• Its appearance was in a TV series.
  
• Its appearance was in a production of Trek in which the principle cast is from the 24th century.
  
• It did not appear in Star Trek: Deep Space Nine.
  
• It is not a celestial body.
  
• It does not contain poisonous parts.
  
• It does not contain metallic parts.
  
• It was not in the first season of Voyager.
  
• It was not in the second season of Voyager.
  
• It was in the third season of Voyager.
  
• It is not from an episode before Future's End Part II.
  
• It is not humanoid.
  
• It is from an episode after RISE.
  
• It is not artificial in its original state.
  
• It was not shown, or mentioned to have killed before.
  
• It was seen as a hologram.
  
• It was not from Scorpion Part I
  
• It was not from "Worst Case Scenario."
  
• It was seen in the episode "Distant Origin"
  
• It was a holographic dinosaur.
  

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"Do you want to be President?"
"Yes."
"Put you hand on the book and say 'I do'."
"I do."
"Good, done. Let's eat!"

- G'kar and Sheridan, Babylon 5.

Was it the hologram of the actual dinosaur? If not, was it the hologram of the evoloved version of the dinosaur?

The evolved version was humanoid, which counts it out. There were at least 2 specific species named. The answer I'm looking for is one of those species.

Oh, there's still 4 questions remaining

But I'm at work right now

------------------
"Do you want to be President?"
"Yes."
"Put you hand on the book and say 'I do'."
"I do."
"Good, done. Let's eat!"

- G'kar and Sheridan, Babylon 5.

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"If at first you don't succeed, skydiving isn't for you."
Federation Starship Datalink - On that annoying Tripod server.

I seem to vaguely recall an iguanadon, but don't hold me to that...

Yes, Hadrosaur is correct.

Fabrux gets it...