Specimen identifications and sizes.

*Histologically sampled. **Examined using research photographs from colleagues and/or through high-resolution research casts. Institution designations: BMMS = Bürgermeister-Müller Museum, Solnhofen; BMNH = Museum of Natural History, London; BSPG = Bayerische Staatssammlung für Paläontogie und Geologie, Munich; BYUVP = Brigham Young University Earth Science Museum, Provo; HMN = Museum für Naturkunde, Humboldt-Universität, Berlin; IGM = Institute of Geology, Mongolian Academy of Sciences, Ulaanbaatar; IVPP = Institute of Vertebrate Paleontology and Paleoanthropology, Beijing; JM = Jura Museum, Eichstät; LPM = Shenyang Normal University, Shenyang; MOR = Museum of the Rockies, Montana State University, Bozeman; TSMHN = Teyler-Museum Haarlem; WDC = Wyoming Dinosaur Center, Thermopolis.