Mr. Clubtail, voiced by Rob Paulsen and Jeff Bennett, is a character who appears in The Land Before Time franchise. He is an Ankylosaurus, which is referred to as a "Clubtail" by the Land Before Time characters.
It is implied that Mr. Clubtail was not part of the combined herds who migrated to the Great Valley during the events of the original The Land Before Time, as he did not appear until the third film, The Land Before Time III: The Time of the Great Giving, but has subsequently continued to make supporting appearances in the later films and TV series. In the flashback scene in the seventh film, The Land Before Time VII: The Stone of Cold Fire, he was not shown hiking to the Great Valley with the other adult dinosaurs. It is possible that he either moved into the Great Valley sometime between the events of The Land Before Time II: The Great Valley Adventure and The Time of the Great Giving, or that he was already living there when the combined herds arrived.
Mr. Clubtail is generally amiable and relaxed, seen in The Land Before Time V: The Mysterious Island, when after catching a fallen treestar the children had hoped to catch, he says kindly, "Mornin' kids, nice day for a treestar!". He also seems to be willing to put himself at a moderate risk to protect others, as in The Land Before Time III he is the only adult to help in fighting the pack of Velociraptor who isn't a relative of the children (including Hyp, Nod and Mutt). A more surly side to his personality, however, is shown in The Land Before Time XII: The Great Day of the Flyers when he is seen losing his temper when Petrie's siblings fall out of the sky on to him, and Petrie himself appears from some ferns he was about to eat. Mr. Clubtail also seems to have a rivalry of sorts with Daddy Topps. In real life, Ankylosaurus and Triceratops may have competed for food and water at the Hell Creek formation.
- Mr. Clubtail's voice has gone through several changes, whether it be through his accent or voice actor. In his first appearance, in The Time of the Great Giving, Rob Paulsen gave Mr. Clubtail a rather soft-spoken role; possibly to combat with Daddy Topps' more harsh and grunt personality. By The Mysterious Island, Rob Paulsen was temporarily replaced by fellow actor Jeff Bennett (who has occasionally acted as a stand-in for Paulsen in The Land Before Time), Bennett gave Mr. Clubtail the same soft-spoken tone, but delivered with a western accent, likely to give Mr. Clubtail a friendlier approach. Paulsen later reprised his role in The Land Before Time XI: Invasion of the Tinysauruses, and went for the same approach in voicing Mr. Clubtail, but gave him a more aggressive countryside accent to tie in with the character's new persona.