Xiphiorhynchus is an extinct, prehistoric swordfish that lived from the Eocene until the Oligocene. It is closely related to the modern-day swordfish.
Xiphiorhynchus resembled a swordfish. However, there's one minor difference. Its upper and lower jaws were extended to look like the point of a sword.
Xiphiorhynchus probably spent time in coastal areas of tropical seas. There are specimens of X. priscus and the holotype of X. kimbalocki.
The type species is Xiphiorhynchus elegans.
Xiphiorhynchus is known from incomplete fossils.