The flathead guitarfish or Pacific guitarfish (''Pseudobatos planiceps'') is a species of cartilaginous fish in the Rhinobatidae family. It is found in shallow seas around Chile, Ecuador, Peru, and possibly Nicaragua. Its natural habitat is the open sea.

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flathead guitarfish Fish of the Pacific Ocean Western South American coastal fauna Taxa named by Samuel Garman flathead guitarfish Taxonomy articles created by Polbot {{Rajiformes-stub