Supplemental Table 1

Database of figured and reposited Helicoprion specimens. Column abbreviation and notes: #, database index number; Inst Acro, Institutional acronym for specimen; Spec., Specimen number; Notes & Alt name, notation on synonymous specimen numbers and counterparts (cp); Locality#, registered locality number; Lat, latitude in decimal degrees; Long, longitude in decimal degrees; Place, town or region; Country, country; Museum, institutional abbreviations listed below; Stratigraphy, formation and member; Stage, based on current stratigraphy, Art=Artinskian, Kung=Kungurian, Leon= Leonardian, Olen=Olenekian, Road=Roadian, Wolf=Wolfcampanian; Original ID, specimen diagnosis according to reference or repository, [H]=holotype, [L]=lectotype; Whorls, specimen quality including number of volutions (w), or number of teeth (t), whether partial (p) or a complete whorl (c), frags=fragments; Diagnosis, our assessment according to the emended diagnoses presented in this paper.
Institutional Abbreviations.—AMNH, American Museum of Natural History, New York, USA; BANFF, Banff Park, Alberta, Canada; ER, Ekaterinburg Regional Natural History Museum, Russia; FCMP, Museo de Paleontologia de la Facultad de Ciencias, Universidad Nacional Autonoma de Mexico; FH, Fort Hall Reservation, Shoshone Bannock Tribal Museum, Idaho, USA; FIELD, Field Museum, Chicago, USA; GSA, Geological Society of America Office, Denver, USA; IMNH, Idaho Museum of Natural History, Pocatello, USA; KCL, Kesen-numa City Library, Japan; KSU, Geological Museum of Kazan State University, Russia ; LACM , Los Angeles County Museum, USA; MNH, Museum of Natural History, University of Kansas, Lawrence, USA; NHMU, Natural History Museum of Utah, Salt Lake City, USA; NMC, Canadian Museum of Nature, Ottawa, Canada; PIN, Palaeontological Institute of the Russian Academy of Sciences, Moscow, Russia; PERM, Perm Regional Natural History Museum, Russia; PMO, Paleontologisk Museum, Oslo, Norway; PRIV, Private Collection; TsNIGR, Central Research Geological Museum, St.-Petersburg, Russia; UCMP, University of California Museum of Paleontology, Berkeley, USA; UFH, Utah Field House of Natural History State Park Museum, Vernal, USA; UMUT, University Museum, University of Tokyo, Japan; UNR, W.M. Keck Earth Science and Mineral Engineering Museum, University of Nevada, Reno, USA; USNM, National Museum of Natural History, Washington DC, USA; YIGM, Yichang Institute of Geology and Mineral Resources, China; WAMAG, Western Australian Museum, Perth, Australia.