Tithonoceras is a genus of nautiloid cephalopod from the Upper Jurassic (Thithonian stage) found in the Crimea, belonging to the nautilacean family Paracenoceratidae.

The shell of Tithonoceras is evolute, coiled with all whorls exposed, smooth, and laterally compressed.

The whorl section is subquadrangular with a broad, flattened venter on the outer rim.

The suture is sinuous, with ventral and lateral lobes.

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