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The reference has been redirected to Fossilworks, and the page it linked to did not mention Pericycloceratidae. I plugged it into their search, and it gave me the page for Metalegoceratidae, with Pericycloceratidae listed as a synonym. I updated the ref, but I leave it to the paleontologists to decide whether the change means this page should be moved or not. — Gorthian (talk) 17:59, 2 December 2015 (UTC)[reply]