A one-fingered dinosaur?

Yep. A very small dino from China has stubby little arms (stubbier and littler, in proportion, than T. rex arms) with a single finger on each hand. It may have dug up terminite mounds with its long digits. Linhenykus monodactylus died out with the rest of the dinos at the end of the Cretaceous period - unless it died of embarassment amid the laughter of other dinosaurs first.
COMMENT: Seriously, the thing looks ridiculous. The platypus has more dignity.