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Upper Cretaceous) Rocks in Texas and the Western Interior of the United States

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Upper Cretaceous) Rocks in Texas and the Western Interior of the United States Tarrantoceras Stephenson and Related Ammonoid Geneva from Cenomanian (Upper Cretaceous) Rocks in Texas and the Western Interior of the United States U.S. GEOLOGICAL SURVEY PROFESSIONAL PAPER 1473 AVAILABILITY OF BOOKS AND MAPS OF THE U.S. GEOLOGICAL SURVEY Instructions on ordering publications of the U.S. Geological Survey, along with prices of the last offerings, are given in the cur­ rent-year issues of the monthly catalog "New Publications of the U.S. Geological Survey." Prices of available U.S. Geological Sur­ vey publications released prior to the current year are listed in the most recent annual "Price and Availability List." Publications that are listed in various U.S. Geological Survey catalogs (see back inside cover) but not listed in the most recent annual "Price and Availability List" are no longer available. Prices of reports released to the open files are given in the listing "U.S. Geological Survey Open-File Reports," updated month­ ly, which is for sale in microfiche from the U.S. Geological Survey, Books and Open-File Reports Section, Federal Center, Box 25425, Denver, CO 80225. Reports released through the NTTS may be obtained by writing to the National Technical Information Service, U.S. Department of Commerce, Springfield, VA 22161; please include NTIS report number with inquiry. Order U.S. Geological Survey publications by mail or over the counter from the offices given below. BY MAIL OVER THE COUNTER Books Books Professional Papers, Bulletins, Water-Supply Papers, Techniques of Water-Resources Investigations, Circulars, publications of general in­ Books of the U.S. Geological Survey are available over the terest (such as leaflets, pamphlets, booklets), single copies of Earthquakes counter at the following Geological Survey Public Inquiries Offices, all & Volcanoes, Preliminary Determination of Epicenters, and some mis­ of which are authorized agents of the Superintendent of Documents: cellaneous reports, including some of the foregoing series that have gone out of print at the Superintendent of Documents, are obtainable by mail from WASHINGTON, D.C.-Main Interior Bldg., 2600 corridor, 18th and CSts.,NW. U.S. Geological Survey, Books and Open-File Reports DENVER, Colorado-Federal Bldg., Rm. 169, 1961 Stout St. Federal Center, Box 25425 LOS ANGELES, California-Federal Eldg., Rm. 7638, 300 N. 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E-146, 701 C St. Maps For maps, address mail orders to U.S. Geological Survey, Map Distribution Maps Federal Center, Box 25286 Maps may be purchased over the counter at the U.S. Geologi­ Denver, CO 80225 cal Survey offices where books are sold (all addresses in above list) and at the following Geological Survey offices: Residents of Alaska may order maps from ROLLA, Missouri-1400 Independence Rd. Alaska Distribution Section, U.S. Geological Survey, DENVER, Colorado-Map Distribution, Bldg. 810, Federal New Federal Building - Box 12 Center 101 Twelfth Ave., Fairbanks, AK 99701 FAIRBANKS, Alaska-New Federal Bldg., 101 Twelfth Ave. Tarrantoceras Stephenson and Related Ammonoid Genera from Cenomanian (Upper Cretaceous) Rocks in Texas and the Western Interior of the United States By WILLIAM A. COBBAN U.S. GEOLOGICAL SURVEY PROFESSIONAL PAPER 1473 Ammonites of the genera Tarrantoceras, Eucalycoceras, Pseudocalycoceras, Sumitomoceras, and Neocardioceras are described and illustrated UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON : 1988 DEPARTMENT OF THE INTERIOR DONALD PAUL HODEL, Secretary U.S. GEOLOGICAL SURVEY Dallas L. Peck, Director Library of Congress Cataloging-in-Publication Data Cobban, William Aubrey, 1916- Tarrantoceras Stephenson and related ammonoid genera from Cenomanian (Upper Cretaceous) rocks in Texas and the western interior of the United States. (U.S. Geological Survey professional paper ; 1473) Bibliography: p. Supt. of Docs, no.: I 19.16:1473 1. Acanthoceratidae. 2. Paleontology Cretaceous. 3. Paleontology Texas. 4. Paleontology West (U.S.) I. Title. II. Series. QE807.A5C635 1988 564'.53 87-600211 For sale by the Books and Open-File Reports Section, U.S. Geological Survey, Federal Center, Box 25425, Denver, CO 80225 CONTENTS Page Abstract ...................................... 1 Systematic descriptions Continued Introduction .................................. 1 Genus Sumitomoceras Matsumoto Continued Localities at which fossils were collected ........... 1 Sumitomoceras bentonianum (Cragin) ........... 15 Systematic descriptions ......................... 1 Genus Neocardioceras Spath ...................... 17 Genus Tarrantoceras Stephenson .............. 2 Neocardioceras juddii (Barrois and de Guerne) .... 17 Tarrantoceras sellardsi (Adkins) ........... 5 Neocardioceras densicostatum Cobban, n. sp ..... 19 Tarrantoceras flexicostatum Cobban, n. sp 7 Neocardioceras uptonense Cobban, n. sp ......... 20 Genus Eucalycoceras Spath .................. 8 Neocardioceras laevigatum Cobban, n. sp ........ 22 Eucalycoceras pentagonum (Jukes-Browne) . 9 Neocardioceras minutum Cobban, n. sp .......... 23 Eucalycoceras templetonense Cobban, n. sp . 10 Neocardioceras sp ............................ 24 Genus Pseudocalycoceras Thomel ............. 12 Zonation of Cenomanian ammonites in the Western Interior 25 Pseudocalycoceras angolaense (Spath) ...... 12 Origin of Tarrantoceras and related genera .............. 25 Genus Sumitomoceras Matsumoto ............ 14 References cited .................................... 26 Sumitomoceras conlini Wright and Kennedy 14 Index ............................................. 29 ILLUSTRATIONS [Plates follow index] PLATES 1, 2. Tarrantoceras. 3, 4. Eucalycoceras. 5. Pseudocalycoceras. 6. Pseudocalycoceras and Sumitomoceras. 7. Sumitomoceras. 8-10. Neocardioceras. Page FIGURE 1. Map of part of the Western Interior of the United States showing localities of fossil collections ......... 2 2. Map of part of northeastern Texas showing localities where Tarrantoceras sellardsi (Adkins) was collected 6 3. Scatter diagram showing number of ribs per half whorl of Tarrantoceras sellardsi (Adkins) ............. 6 4. Sutures of Tarrantoceras sellardsi (Adkins) ...................................................... 7 5. Suture of Tarrantoceras flexicostatum Cobban, n. sp ............................................ 8 6. Suture of Eucalycoceras pentagonum (Jukes-Browne) ............................................. 9 7. Sutures of Eucalycoceras pentagonum (Jukes-Browne) ............................................ 10 8. Suture of Eucalycoceras templetonense Cobban, n. sp ............................................. 11 9. Scatter diagram showing number of ribs per half whorl of Pseudocalycoceras angolaense (Spath) ........ 13 10. Suture of Pseudocalycoceras angolaense (Spath) .................................................. 14 IV CONTENTS Page FIGURE 11. Sutures of Sumitomoceras conlini Wright and Kennedy .................................................. 15 12. Suture of Sumitomoceras bentonianum (Cragin) ......................................................... 16 13. Scatter diagrams showing umbilical ratios and number of ribs per half whorl of Neocardioceras juddii (Barrois and de Guerne) ....................................................................................... 19 14. Suture of Neocardioceras juddii (Barrois and de Guerne) ................................................. 20 15. Scatter diagram showing number of ribs per half whorl of Neocardioceras densicostatum Cobban, n. sp ......... 20 16. Scatter diagrams showing umbilical ratios and number of ribs per half whorl of Neocardioceras uptonense Cobban, n. sp .......................................................................................... 21 17. Sutures of Neocardioceras uptonense Cobban, n. sp ...................................................... 22 18. Suture of Neocardioceras laevigatum Cobban, n. sp ...................................................... 23 19. Scatter diagrams showing umbilical ratios and number of ribs per half whorl of Neocardioceras minutum Cobban, n. sp .......................................................................................... 24 20. Suture of Neocardioceras minutum Cobban, n. sp ....................................................... 24 21. Suture of Neocardioceras sp ......................................................................... 24 TABLES Page TABLE 1. Localities at which fossils were collected ...... 3 2. Zonation and ranges of Cenomanian ammonites 26 TARRANTOCERAS STEPHENSON AND RELATED AMMONOID GENERA FROM CENOMANIAN (UPPER CRETACEOUS) ROCKS IN TEXAS AND THE WESTERN INTERIOR OF THE UNITED STATES By WILLIAM A. COBBAN ABSTRACT of the genera have been found in Mississippi, Texas, New Mexico, Arizona, Utah, Colorado, Oklahoma, Kan­ Tarrantoceras, Eucalycoceras, Pseudocalycoceras, Sumitomoceras, sas, Wyoming, South Dakota, and Montana.
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