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First reported actinopterygian from the Navajo Sandstone (Lower Jurassic, Glen Canyon Group) of southern Utah, USA

  • Joseph A. Frederickson (a1) (a2) and Brian M. Davis (a2) (a3)

We report the first occurrence of an actinopterygian fish from the Lower Jurassic Navajo Sandstone, discovered in the Grand Staircase-Escalante National Monument in southern Utah, U.S.A. The site contains multiple individuals, preserved within an interdune deposit, possessing the elongate modified dorsal scales usually characterizing semionotiform fishes. The presence of moderately sized fish provides further evidence that interdune oases were occasionally persistent environmental habitats within the greater Navajo dune system, and that the paleobiota is still woefully undersampled. Additionally, this site could help fill a gap in the actinopterygian fossil record between the patchy Lower Jurassic and better-known Middle Jurassic documentation of western North America.

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      First reported actinopterygian from the Navajo Sandstone (Lower Jurassic, Glen Canyon Group) of southern Utah, USA
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Arambourg, C., and Bertin, L., 1958, Super-ordre des Holostéens et des Halecostomi (Holostei et Halecostomi): Traité de Zoologie: Anatomie, Systématique, Biologie, v. 13, p. 21732203.
Blakey, R.C., Peterson, F., and Kocurek, G., 1988, Synthesis of late Paleozoic and Mesozoic eolian deposits of the Western Interior of the United States: Sedimentary Geology, v. 56, p. 3125.
Brady, L.F., 1935, Preliminary note on the occurrence of a primitive theropod in the Navajo: American Journal of Science, v. 30, p. 210215.
Brady, L.F., 1936, A note concerning the fragmentary remains of a small theropod recovered from the Navajo sandstone in northern Arizona: American Journal of Science, v. 31, p. 150.
Brito, P.M., 1997, Révision des Aspidorhynchidae (Pisces, Actinopterygii) du Mésozoïque: ostéologie, relations phylogénétiques, données environnementales et biogéographiques: Geodiversitas, v. 19, p. 681772.
Cavin, L., 2010, Diversity of Mesozoic semionotiform fishes and the origin of gars (Lepisosteidae): Naturwissenschaften, v. 97, p. 10351040.
Cavin, L., Suteethorn, V., Khansubha, S., Buffetaut, E., and Tong, H., 2003, A new Semionotid (Actinopterygii, Neopterygii) from the Late Jurassic–Early Cretaceous of Thailand: Comptes Rendus Palevol, v. 2, p. 291297.
Cavin, L., Deesri, U., and Suteethorn, V., 2009, The Jurassic and Cretaceous bony fish record (Actinopterygii, Dipnoi) from Thailand: Geological Society, London, Special Publications, v. 315, p. 125139.
Curtis, K., and Padian, K., 1999, An Early Jurassic microvertebrate fauna from the Kayenta Formation of northeastern Arizona: microfaunal change across the Triassic-Jurassic boundary: PaleoBios, v. 19, p. 1937.
Doelling, H.H., Blackett, R.E., Hamblin, A.H., Powell, J.D., and Pollock, G.L., 2010, Geology of Grand-Staircase-Escalante National Monument, Utah: Utah Geological Association Publication, v. 28, p. 193235.
Doelling, H.H., Sprinkel, D.A., Kowallis, B., and Kuehne, P.A., 2013, Temple Cap and Carmel Formations in the Henry Mountains basin, Wayne and Garfield counties: Utah Geological Association Publication, v. 42, p. 279318.
Eastman, C.R., 1917, Fossil fishes in the collection of the United States National Museum: Proceedings of the United States National Museum, v. 52, p. 235304.
Eisenberg, L., 2003, Giant stromatolites and a supersurface in the Navajo Sandstone, Capitol Reef National Park, Utah: Geology, v. 31, p. 111114.
Frederickson, J.A., and Cifelli, R.L., 2017, New Cretaceous lungfishes (Dipnoi, Ceratodontidae) from western North America: Journal of Paleontology, v. 91, p. 146161.
Galton, P.M., 1971, The prosauropod dinosaur Ammosaurus, the crocodile Protosuchus, and their bearing on the age of the Navajo Sandstone of northeastern Arizona: Journal of Paleontology, v. 45, p. 781795.
Gibson, S.Z., 2013a, A new hump-backed ginglymodian fish (Neopterygii, Semionotiformes) from the Upper Triassic Chinle Formation of southeastern Utah: Journal of Vertebrate Paleontology, v. 33, p. 10371050.
Gibson, S.Z., 2013b, Biodiversity and evolutionary history of †Lophionotus (Neopterygii: †Semionotiformes) from the Western United States: Copeia, v. 2013, p. 582603.
Gibson, S.Z., 2016, Redescription and phylogenetic placement of †Hemicalypterus weiri Schaeffer, 1967 (Actinopterygii, Neopterygii) from the Triassic Chinle Formation, southwestern United States: new insights into morphology, ecological niche, and phylogeny: PLoS ONE, v. 11, p. e0163657.
Good, T.R., and Ekdale, A.A., 2014, Paleoecology and taphonomy of trace fossils in the eolian Upper Triassic/Lower Jurassic Nugget Sandstone, northeastern Utah: Palaios, v. 29, p. 401413.
Grande, L., 2010, An empirical synthetic pattern study of gars (Lepisosteiformes) and closely related species, based mostly on skeletal anatomy. The resurrection of Holostei: Copeia, v. 2010, 871 p.
Harvey, B.C., and Stewart, A.J., 1991, Fish size and habitat depth relationships in headwater streams: Oecologia, v. 87, p. 336342.
Haynes, C.V., 1987, Holocene migration rates of the Sudano-Sahelian wetting front, Arba’in Desert, eastern Sahara, in Close, A.E., ed., Prehistory of Arid North Africa: Dallas, Southern Methodist University Press, p. 6984.
Haynes, C.V., Eyles, C.H., Pavlish, L.A., Ritchie, J.C., and Rybak, M., 1989, Holocene palaeoecology of the eastern Sahara; Selima Oasis: Quaternary Science Reviews, v. 8, p. 109136.
Hesse, C.J., 1935, Semionotus cf. gigas, from the Triassic of Zion Park, Utah: American Journal of Science, v. 29, p. 526531.
Irmis, R.B., 2005, A review of the vertebrate fauna of the Lower Jurassic Navajo Sandstone in Arizona: Vertebrate Paleontology of Arizona, Mesa Southwest Museum Bulletin, v. 11, p. 5571.
Jain, S.L., 1984, Some new observations on Lepidotes maximus (Holostei: Semionotiformes) from the German Upper Jurassic: Journal of the Palaeontological Society of India, v. 30, p. 1825.
Kirkland, J.I., Milner, A.C., Olsen, P.E., and Hargrave, J.E., 2014, The Whitmore Point Member of the Moenave Formation in its type area in Northern Arizona and its age and correlation with the section in St. George, Utah: evidence for two major lacustrine sequences, in MacLean, J.S., Biek, R.F., and Huntoon, J.E., eds., Geology of Utah’s Far South: Utah Geological Association Publication, 43, p. 321356.
Klein, E.F., 1885, Beiträge zur Bildung des Schädels der Knochenfische, 2: Jahreshefte des Vereins für Vaterländische Naturkunde in Württemberg, v. 42, p. 205300.
Lacepède, B.G.E., 1803, Histoire Naturelle des Poissons, v. 5: Paris, Plassan, 803 p.
Loope, D.B., and Rowe, C.M., 2003, Long‐lived pluvial episodes during deposition of the Navajo Sandstone: The Journal of Geology, v. 111, p. 223232.
Loope, D.B., Rowe, C.M., and Joeckel, R.M., 2001, Annual monsoon rains recorded by Jurassic dunes: Nature, v. 412, p. 6466.
López-Arbarello, A., 2012, Phylogenetic interrelationships of ginglymodian fishes (Actinopterygii: Neopterygii): PLoS ONE, v. 7, p. e39370.
McCune, A.R., 1986, A revision of Semionotus (Pisces: Semionotidae) from the Triassic and Jurassic of Europe: Palaeontology, v. 29, p. 213233.
McCune, A.R., 1987, Toward the phylogeny of a fossil species flock: semionotid fishes from a lake deposit in the Early Jurassic Towaco Formation, Newark Basin: Peabody Museum of Natural History Bulletin, v. 43, p. 1108.
Milàn, J., Loope, D.B., and Bromley, R.G., 2008, Crouching theropod and Navahopus sauropodomorph tracks from the Early Jurassic Navajo Sandstone of USA: Acta Palaeontologica Polonica, v. 53, p. 197205.
Milner, A.C., and Kirkland, J.I., 2006, Preliminary review of the Early Jurassic (Hettangian) freshwater Lake Dixie fish fauna in the Whitmore Point Member, Moenave Formation in southwest Utah: New Mexico Museum of Natural History and Science Bulletin, v. 37, p. 510521.
Milner, A.C., Kirkland, J.I., and Birthisel, T.A., 2006, The geographic distribution and biostratigraphy of Late Triassic–Early Jurassic freshwater fish faunas of the southwestern United States: New Mexico Museum of Natural History and Science Bulletin, v. 37, p. 522529.
Milner, A. R. C., Birthsel, T., Kirkland, J. I., Breithaup, B., Matthews, N., Lockley, M. G., Santucci, V. L., Gibson, S. Z., DeBlieux, D., Hurlbut, M., Harris, J. D., and Olsen, P. E., 2012, Tracking Early Jurassic dinosaurs in southwestern Utah and the Triassic-Jurassic transition: Nevada State Museum Paleontological Papers, v. 1, p. 1107.
Olsen, P.E., and McCune, A.R., 1991, Morphology of the Semionotus elegans species group from the Early Jurassic part of the Newark Supergroup of eastern North America with comments on the Family Semionotidae (Neopterygii): Journal of Vertebrate Paleontology, v. 11, p. 269292.
Olsen, P.E., McCune, A.R., and Thomson, K.S., 1982, Correlation of the early Mesozoic Newark Supergroup by vertebrates, principally fishes: American Journal of Science, v. 282, p. 144.
Padian, K., and Clemens, W.A., 1985, Terrestrial vertebrate diversity: episodes and insights, in Valentine, J., ed., Phanerozoic Diversity Patterns: Profiles in Macroevolution: Princeton, Princeton University Press, p. 4196.
Parrish, J.T., and Falcon-Lang, H.J., 2007, Coniferous trees associated with interdune deposits in the Jurassic Navajo Sandstone Formation, Utah, USA: Palaeontology, v. 50, p. 829843.
Rafinesque, C.S., 1820, Ichthyologia Ohioensis, or Natural History of Fishes Inhabiting the Ohio and Its Tributary Streams Preceded by a Physical Description of the Ohio and Its Branches: Lexington, W. O. Hunt, 90 p.
Regan, C.T., 1923, The skeleton of Lepisosteus, with remarks on the origin and evolution of the lower neopterygian fishes: Proceedings of the Zoological Society of London, v. 192, p. 445461.
Riese, D.J., Hasiotis, S.T., and Odier, G.P., 2011, Synapsid burrows and associated trace fossils in the Lower Jurassic Navajo Sandstone, southeastern Utah, U.S.A., indicates a diverse community living in a wet desert ecosystem: Journal of Sedimentary Research, v. 81, p. 299325.
Schaeffer, B., 1967, Late Triassic fishes from the western United States: Bulletin of the American Museum of Natural History, v. 135, p. 285342.
Schaeffer, B., and Dunkle, D.H., 1950, A semionotid fish from the Chinle Formation, with consdieration of its relationships: American Museum Novitates, 1457, p. 129.
Schaeffer, B., and Patterson, C., 1984, Jurassic fishes from the western United States, with comments on Jurassic fish distribution: American Museum Novitates, v. 2796, p. 186.
Schlosser, I.J., 1988, Predation risk and habitat selection by two size classes of a stream cyprinid: experimental test of a hypothesis: Oikos, v. 52, p. 3640.
Sertich, J.J.W., and Loewen, M.A., 2010, A new basal sauropodomorph dinosaur from the Lower Jurassic Navajo Sandstone of southern Utah: PLoS ONE, v. 5, p. e9789.
Sues, H.-D., Clark, J.M., and Jenkins, F.A. Jr, 1994, A review of the Early Jurassic tetrapods from the Glen Canyon Group of the American Southwest, in Frasier, N.C., and Sues, H.-D., eds., In the Shadow of Dinosaurs: Early Mesozoic Tetrapods: Cambridge, Cambridge University Press, p. 285294.
Tykoski, R.S., Rowe, T.B., Ketchum, R.A., and Colbert, E.H., 2002, Calsoyasuchus valliceps, a new crocodyliform from the Early Jurassic Kayenta Formation of Arizona: Journal of Vertebrate Paleontology, v. 22, p. 593611.
Wenz, S., 2003, Les Lepidotes (Actinopterygii, Semionotiformes) du Crétacé Inférieur (Barrémien) de Las Hoyas (Province de Cuenca, Espagne): Geodiversitas 25, p. 481499.
Werner, E.E., Hall, D.J., Laughlin, D.R., Wagner, D.J., Wilsmann, L.A., and Funk, F.C., 1977, Habitat partitioning in a freshwater fish community: Journal of the Fisheries Research Board of Canada, v. 34, p. 360370.
Wilson, M.V.H., and Bruner, J.C., 2004, Mesozoic fish assemblages of North America, in Arratia, G., and Tintori, A., eds., Mesozoic Fishes 3: Systematics, Paleoenvironments and Biodiversity: München, Verlag Dr. Friedrich Pfeil, p. 575595.
Winkler, D.A., Jacobs, L.L., Congleton, J.D., and Downs, W.R., 1991, Life in a sand sea: biota from Jurassic interdunes: Geology, v. 19, p. 889892.
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