Baby dinosaurs from the Late Cretaceous Lance and Hell Creek formations and a description of a new species of theropod Author Carpenter, Kenneth text Contributions to Geology, University of Wyoming 1982 1982-01-31 20 123 134 journal article 26591 10.5281/zenodo.3238510 a342eb67-842d-41ab-a05d-3f010d0038ec 3238510 Pectinodon new genus Diagnosis : Crowns of teeth strongly compressed laterally and recurved. Anterior margin without serrations, denticles, or sharp translucent keel; edge usually rounded, but may have low, blunt, opaque keel or ridge. Posterior margin with large serrations having translucent edges. Serrations largest in middle, and may be subequal to crown’s tip in size. Posterior serrations perpendicular to vertical axis of tooth. Crown tip directed posteriorly, almost parallel to crown base. Crown tip does not function as a piercing tip, but as first serration. First definitive serration occurs immediately below crown tip and differs from other small theropods (“dromaeosaurids”) in that it is not significantly smaller than crown tip. Near tooth’s base, two small serrations are crowded together. Anteroposterior length of tooth almost equal to height. Type species : Pectinodon bakkeri new species Etymology: pectin- , Latin for “ comb”; and - odon , Greek for “ tooth.”