is this a sentence fragment? until the variable harlequin toad was rediscovered in a remote mountain region…

is this a sentence fragment? until the variable harlequin toad was rediscovered in a remote mountain region of costa rica. yes no
Answer
Brief Explanations:
A sentence fragment is an incomplete thought. The given text "Until the variable harlequin toad was rediscovered in a remote mountain region of Costa Rica." is a dependent - clause starting with a subordinating conjunction "until" and lacks a main clause to complete the thought.
Answer:
yes