This reconstruction shows the nasal passages from the left half of the skull of “Joe” the baby Parasaurolophus. The model here was created from CT scan data; most of these structures are not visible externally, so such model scans were necessary to see the features. Note the straight pathway of the nasal passages at their start, and how they curve around at the top. This curvature was inside the crest. Paleontologists speculate these airways may have been used for sound production.
Having trouble viewing the model? This 3D viewer works best on Firefox, Chrome, and Safari (no Internet Explorer, sorry!). Many of the files are viewable as 3D PDFs (via Adobe Acrobat) for download from the journal article at PeerJ, including a 3D pdf of the skull. A table with links to all of the raw data hosted at Figshare (including printable STL files) is available at PeerJ.