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Litophragmatoceras incomptum gen. et sp.nov. (Cretaceous Ammonoidea), a cryptic micromorph from the Upper Cenomanian of Arizona

Published online by Cambridge University Press:  01 May 2009

W. J. Kennedy  and
W. A. Cobban
W. J. Kennedy
Affiliation:
Geological Collections, University Museum, Parks Road, Oxford OX1 3PW, U.K.
W. A. Cobban
Affiliation:
U.S. Geological Survey, Paleontology and Stratigraphy Branch, Box 25046, Mail Stop 919, Denver Federal Center, Denver, Colorado 80225, U.S.A.
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Abstract

Litophragmatoceras incomptum gen. et sp.nov. is a small dimorphic planulate ammonite from the Upper Cenomanian Metoicoceras mosbyense Zone of Arizona in which microconchs are adult at as little as 5 mm diameter and macroconchs at 23 mm diameter or less. The quinquelobate suture is very simple, with entire lobes and saddles. It is distinct from all contemporaneous ammonites and is referred, with no great certainty, to the otherwise exclusively Upper Albian and Lower Cenomanian Flickiinae Adkins, 1928.

Type
Articles
Information
Geological Magazine , Volume 125 , Issue 5 , September 1988 , pp. 535 - 539
Copyright
Copyright © Cambridge University Press 1988

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References

Adkins, W. S. 1920. The Weno and Pawpaw Formations of the Texas Comanchean. University of Texas Bulletin 1856, 1–172, 11 pls.Google Scholar
Adkins, W. S. 1928. Handbook of Texas Cretaceous Fossils. University of Texas Bulletin 2838, 385 pp., 37 pls.Google Scholar
Böse, E. 1928. Cretaceous ammonites from Texas and northern Mexico. University of Texas Bulletin 2748, 143–312, pls. 1–18 (1927 imprint).Google Scholar
Cobban, W. A. 1953. Cenomanian ammonite fauna from the Mosby Sandstone of central Montana. U.S. Geological Survey Professional Paper 243–D, 45–55, pls. 6–12.Google Scholar
Cobban, W. A. 1961. The ammonite family Binneyitidae Reeside in the western interior of the United States. Journal of Paleontology 35, 737–58, pls. 87–9.Google Scholar
Cobban, W. A. 1971. New and little-known ammonites from the Upper Cretaceous (Cenomanian and Turonian) of the Western Interior of the United States. U.S. Geological Survey Professional Paper 699, 24 pp., 18 pls.Google Scholar
Grossouvre, A. De 1894. Recherches sur la craie supérieurre, 2: Paléontologie. Les ammonites de la craie supérieure. Mémoires de la Service de la carte géologique détaille de la France 264 pp., 39 pls. (1893 imprint).CrossRefGoogle Scholar
Hyatt, A. 1889. Genesis of the Arietidae. Smithsonian Contributions to Knowledge 673, xi + 238 pp., 14 pls.Google Scholar
Kennedy, W. J. & Wright, C. W. 1985. Evolutionary patterns in late Cretaceous ammonites. Palaeontology 33, 131–43.Google Scholar
Kirkland, J. I. & Cobban, W. A. 1986. Cunningtoniceras arizonense n.sp., a large acanthoceratid ammonite from the Upper Cenomanian (Cretaceous) of eastern central Arizona. Hunteria 1, 1–14, pls. 1–8.Google Scholar
Kullmann, J. & Wiedmann, J. 1970. Significance of sutures in phylogeny of Ammonoidea. Paleontological Contributions. University of Kansas 47, 32 pp.Google Scholar
Pervinquière, L. 1907. Etudes de paléontologie tunisienne. 1. Céphalopodes des terrains sécondaires. Carte géologigue de Tunisie. V + 438 pp., 27 pls. Paris: de Rudeval.Google Scholar
Shumard, B. F. 1860. Descriptions of new Cretaceous fossils from Texas. Transactions of the Academy of Sciences of St Louìs 1, 590–610.Google Scholar
Wedekind, R. 1916. Über Lobus, Suturallobus and Inzision. Zentralblatt für Mineralogie, Geologie und Paläontologie (B) 1916 (8), 185–95.Google Scholar
Wiedmann, J. 1965. Origin, limits and systematic position of Scaphites. Palaeontology 8, 397–453, pls. 53–60.Google Scholar
Wiedmann, J. 1966. Stammesgeschichte und System den posttriadischen Ammonoideen: ein Überblick. Neues Jahrbuch für Geologie und Paläontologie. Abhandlungen 125, 49–79, pls. 1–2, 127, 13–81, pls. 3–6.Google Scholar
Wright, C. W. & Kennedy, W. J. 1979. Origin and evolution of the Cretaceous micromorph ammonite family Flickiidae. Palaeontology 22, 685–704, pls. 87–98.Google Scholar
Young, K. 1957. Cretaceous ammonites from eastern Apache County, Arizona. Journal of Paleontology 31, 1167–74, pls. 149–50.Google Scholar
Young, K. 1979. Lower Cenomanian and Late Albian (Cretaceous) ammonites, especially Lyelliceratidae, of Texas and Mexico. Texas Memorial Museum Bulletin 26, 99 pp., 9 pls.Google Scholar
Zittel, K. A. 1884. Handbuch der Palaeontologie, Abt. 1, 2, (Lief 3), Cephalopoda, 329–552. Munich and Leipzig: R. Oldenbourg.Google Scholar