There are several Unidentified Creatures in The Land Before Time. These creatures currently don't have any known genus. If an identification for any of these creatures is found, they shall be removed from this page and given a page of their own.
SalamanderAn unknown, green salamander appears briefly in the opening scene The Land Before Time. It is seen swimming in the ocean before being scared off by a Metriorhynchus. It has long back spines that look similar to those of Longisquama. However, Longisquama was a reptile and a terrestrial animal, not an aquatic amphibian.
Three Lizards and Two Pterosaurs
During another shot in Littlefoot's birth, an unidentified olive lizard can briefly be seen sitting on Littlefoot's Mother's foot.
Several unknown invertebrates briefly appear in The Land Before Time. Within this group, there are some insects and some arachnids, but it is unknown exactly what species they are.
Large Log Insect
Three pairs of glowing eyes are briefly seen in The Land Before Time V: The Mysterious Island during the song Big Water. It is unknown what these creatures are, given that all we can see of them are their eyes. More unidentified glowing eyes also briefly appear in the episode The Cave of Many Voices.
An unidentified giant wasp appears as an enemy in the game The Land Before Time for the GameBoy Advance. It appears in the fifth and final area of the game, Burning Mountain. It flies back and forth attempting to run into the player to deal damage. However, it can be defeated by jumping on its back three times. It gives 400 points when defeated.
An insect of an unknown classification appears as an enemy in the game The Land Before Time: Into the Mysterious Beyond for the GameBoy Advance. It is the very first enemy encountered in the game. It walks back and forth attempting to run into the player to deal damage. However, it can be easily defeated by jumping on its back.