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CONODONT BIOSTRATIGRAPHY and ... -.: Palaeontologia Polonica
CONODONT BIOSTRATIGRAPHY AND PALEOECOLOGY OF THE PERTH LIMESTONE MEMBER, STAUNTON FORMATION (PENNSYLVANIAN) OF THE ILLINOIS BASIN, U.S.A. CARl B. REXROAD. lEWIS M. BROWN. JOE DEVERA. and REBECCA J. SUMAN Rexroad , c.. Brown . L.. Devera, 1.. and Suman, R. 1998. Conodont biostrati graph y and paleoec ology of the Perth Limestone Member. Staunt on Form ation (Pennsy lvanian) of the Illinois Basin. U.S.A. Ill: H. Szaniawski (ed .), Proceedings of the Sixth European Conodont Symposium (ECOS VI). - Palaeont ologia Polonica, 58 . 247-259. Th e Perth Limestone Member of the Staunton Formation in the southeastern part of the Illinois Basin co nsists ofargill aceous limestone s that are in a facies relati on ship with shales and sandstones that commonly are ca lcareous and fossiliferous. Th e Perth conodo nts are do minated by Idiognathodus incurvus. Hindeodus minutus and Neognathodu s bothrops eac h comprises slightly less than 10% of the fauna. Th e other spec ies are minor consti tuents. The Perth is ass igned to the Neog nathodus bothrops- N. bassleri Sub zon e of the N. bothrops Zo ne. but we were unable to co nfirm its assignment to earliest Desmoin esian as oppose d to latest Atokan. Co nodo nt biofacies associations of the Perth refle ct a shallow near- shore marine environment of generally low to moderate energy. but locali zed areas are more variable. particul ar ly in regard to salinity. K e y w o r d s : Co nodo nta. biozonation. paleoecology. Desmoinesian , Penn sylvanian. Illinois Basin. U.S.A. -
Conodont Faunas Across the Mid-Carboniferous Boundary From
Conodont faunas across the mid-Carboniferous boundary from the Barcaliente Formation at La Lastra (Palentian Zone, Cantabrian Mountains, northwest Spain); geological setting, sedimentological characters and faunal descriptions T.I. Nemyrovska, R.H. Wagner, C.F. Winkler Prins & I. Montañez Nemyrovska, T.I., Wagner, R.H., Winkler Prins, C.F. & Montañez, I. Conodont faunas across the mid- Carboniferous boundary from the Barcaliente Formation at La Lastra (Palentian Zone, Cantabrian Mountains, northwest Spain); geological setting, sedimentological characters and faunal descriptions. Scripta Geologica, 143: 127-183, 8 figs., 4 pls, 1 table, Leiden, December 2011. Tamara I. Nemyrovska, Institute of Geological Sciences, National Academy of Sciences of Ukraine, Gonchar Str., 55-b, 01054 Kiev, Ukraine ([email protected]); Robert H. Wagner, Centro Paleobotánico, IMGEMA Jardín Botánico de Córdoba, Avenida de Linneo s/n, E 14004 Córdoba, Spain (cr1wagro@uco. es); Cor F. Winkler Prins, NCB Naturalis, Postbus 9517, 2300 RA Leiden, The Netherlands (Cor.Winkler@ ncbnaturalis.nl); Isabel Montañez, Department of Geology, University of California, Davis, CA 95616, U.S.A. (ipmontañ[email protected]). Keywords — Serpukhovian, Bashkirian, biostratigraphy, palaeoecology. Two different tectono-stratigraphic domains are recognised in the Cantabrian Mountains, Asturian-Leo- nese (Cantabrian Zone) and Palentian (Palentian Zone). The area under investigation belongs to the south- ern part of the Palentian Domain and attention is focused on the Upper Viséan to lowermost Bashkirian limestones at the village of La Lastra in northern Palencia. A new geological map of the Palentian Zone is accompanied by a more detailed map centred on La Lastra. The Barcaliente Limestone Formation (Ser- pukhovian to lowermost Bashkirian) occurs in the overturned limb of a recumbent anticline which consti- tutes the head of a south-verging major thrust unit, the Carrionas Thrust Sheet (Palentian Zone). -
Pennsylvanian Boundary Unconformity in Marine Carbonate Successions
University of Nebraska - Lincoln DigitalCommons@University of Nebraska - Lincoln Dissertations & Theses in Earth and Atmospheric Earth and Atmospheric Sciences, Department of Sciences Summer 6-2014 ORIGIN AND DISTRIBUTION OF THE MISSISSIPPIAN – PENNSYLVANIAN BOUNDARY UNCONFORMITY IN MARINE CARBONATE SUCCESSIONS WITH A CASE STUDY OF THE KARST DEVELOPMENT ATOP THE MADISON FORMATION IN THE BIGHORN BASIN, WYOMING. Lucien Nana Yobo University of Nebraska-Lincoln, [email protected] Follow this and additional works at: http://digitalcommons.unl.edu/geoscidiss Part of the Geochemistry Commons, Geology Commons, Sedimentology Commons, and the Stratigraphy Commons Nana Yobo, Lucien, "ORIGIN AND DISTRIBUTION OF THE MISSISSIPPIAN – PENNSYLVANIAN BOUNDARY UNCONFORMITY IN MARINE CARBONATE SUCCESSIONS WITH A CASE STUDY OF THE KARST DEVELOPMENT ATOP THE MADISON FORMATION IN THE BIGHORN BASIN, WYOMING." (2014). Dissertations & Theses in Earth and Atmospheric Sciences. 59. http://digitalcommons.unl.edu/geoscidiss/59 This Article is brought to you for free and open access by the Earth and Atmospheric Sciences, Department of at DigitalCommons@University of Nebraska - Lincoln. It has been accepted for inclusion in Dissertations & Theses in Earth and Atmospheric Sciences by an authorized administrator of DigitalCommons@University of Nebraska - Lincoln. ORIGIN AND DISTRIBUTION OF THE MISSISSIPPIAN – PENNSYLVANIAN BOUNDARY UNCONFORMITY IN MARINE CARBONATE SUCCESSIONS WITH A CASE STUDY OF THE KARST DEVELOPMENT ATOP THE MADISON FORMATION IN THE BIGHORN BASIN, WYOMING. By Luscalors Lucien Nana Yobo A THESIS Presented to the Faculty of The Graduate College at the University of Nebraska In Partial Fulfillment of Requirements For the Degree of Master of Science Major: Earth and Atmospheric Sciences Under the Supervision of Professor Tracy D. -
Sequence Biostratigraphy of Carboniferous-Permian Boundary
Brigham Young University BYU ScholarsArchive Theses and Dissertations 2019-07-01 Sequence Biostratigraphy of Carboniferous-Permian Boundary Strata in Western Utah: Deciphering Eustatic and Tectonic Controls on Sedimentation in the Antler-Sonoma Distal Foreland Basin Joshua Kerst Meibos Brigham Young University Follow this and additional works at: https://scholarsarchive.byu.edu/etd Part of the Physical Sciences and Mathematics Commons BYU ScholarsArchive Citation Meibos, Joshua Kerst, "Sequence Biostratigraphy of Carboniferous-Permian Boundary Strata in Western Utah: Deciphering Eustatic and Tectonic Controls on Sedimentation in the Antler-Sonoma Distal Foreland Basin" (2019). Theses and Dissertations. 7583. https://scholarsarchive.byu.edu/etd/7583 This Thesis is brought to you for free and open access by BYU ScholarsArchive. It has been accepted for inclusion in Theses and Dissertations by an authorized administrator of BYU ScholarsArchive. For more information, please contact [email protected], [email protected]. Sequence Biostratigraphy of Carboniferous-Permian Boundary Strata in Western Utah: Deciphering Eustatic and Tectonic Controls on Sedimentation in the Antler-Sonoma Distal Foreland Basin Joshua Kerst Meibos A thesis submitted to the faculty of Brigham Young University in partial fulfillment of the requirements for the degree of Master of Science Scott M. Ritter, Chair Brooks B. Britt Sam Hudson Department of Geological Sciences Brigham Young University Copyright © 2019 Joshua Kerst Meibos All Rights Reserved ABSTRACT Sequence Biostratigraphy of Carboniferous-Permian Boundary Strata in Western Utah: Deciphering Eustatic and Tectonic Controls on Sedimentation in the Antler-Sonoma Distal Foreland Basin Joshua Kerst Meibos Department of Geological Sciences, BYU Master of Science The stratal architecture of the upper Ely Limestone and Mormon Gap Formation (Pennsylvanian-early Permian) in western Utah reflects the interaction of icehouse sea-level change and tectonic activity in the distal Antler-Sonoma foreland basin. -
VOLUME 33 December 2017
VOLUME 33 December 2017 Volume 33 Table of Contents EXECUTIVE’S COLUMN…………………………………………………………………..…….. 2 OBITUARY……………………………………………………………………………………..…5 SCCS REPORTS………………………………………………………………………………….7 ANNUAL REPORT TO ICS FOR 2016-2017…………………………………………………..….7 TASK GROUP REPORTS FOR 2016-2017 AND WORK PLANS FOR 2017 FISCAL YEAR………….11 Report of the task group to establish a GSSP close to the existing Viséan-Serpukhovian boundary…………11 Report of the task group to establish a GSSP close to the existing Bashkirian-Moscovian boundary………16 Report of the task group to establish the Moscovian-Kasimovian and Kasimovian-Gzhelian boundaries…....18 SCCS DOCUMENTS (CONTRIBUTIONS BY MEMBERS)…………………………………...……21 SHALLOW-WATER SIPHONODELLIDS AND DEFINITION OF THE DEVONIAN-CARBONIFEROUS BOUNDARY…………………………………………………………………………………….21 REPORT FOR PROGRESS FOR 2017 ACTIVITIES IN THE CANTABRIAN MOUNTAINS, SPAIN AND THE AMAZONAS BASIN, BRAZIL……………………………………………...………………26 TAXONOMIC AND STRATIGRAPHIC PROBLEMS CONCERNING THE CONODONTS LOCHRIEA SENCKENBERGICA NEMIROVSKAYA, PERRET & MEISCHNER, 1994 AND LOCHRIEA ZIEGLERI NEMIROVSKAYA, PERRET & MEISHCNER, 1994-CONSEQUENCES FOR DEFINING THE VISÉAN- SERPUKHOVIAN BOUNDARY………………………………………………………………………………...28 PROGRESS ON THE VISÉAN-SERPUKHOVIAN BOUNDARY IN SOUTH CHINA AND GERMANY……………………………………………………………………………………..35 POTENTIAL FOR A MORE PRECISE CORRELATION OF THE BASHKIRIAN AMMONOID AND FORAMINIFERAL ZONES IN THE SOUTH URALS…………………………………………..……42 CHEMOMETRICS AND CARBONIFEROUS MEDULLOSALEAN FRONDS: IMPLICATIONS FOR CARBONIFEROUS PHYTOSTRATIGRAPHY…………………………………………………...…45 -
Proceedings of the Indiana Academy of Science 83
Proceedings of the Indiana Academy of Science 83 (1993) Volume 102 p. 83-91 CONODONTS FROM COAL BALLS IN THE SPRINGFIELD COAL MEMBER OF THE PETERSBURG FORMATION (DESMOINESIAN, PENNSYLVANIAN) IN SOUTHERN INDIANA Carl B. Rexroad Indiana Geological Survey 611 North Walnut Grove Bloomington, Indiana 47405 ABSTRACT: A well-preserved and moderately diverse conodont faunule was recovered from five coal balls in the Springfield Coal Member of the Petersburg Formation from Peabody Coal Com- pany's Eby Pit, Lynnville Mine, in Warrick County, Indiana. The presence of Neognathodus roundyi and the other species recorded in this study is compatible with the middle Desmoinesian age of the Springfield. Idioprioniodus conjunctus is the most ecologically diagnostic of the conodonts and suggests organic-rich, quiet water with a low pH, which in turn suggests that the conodonts lived in a salt-water marsh bordered on one side by coal swamps and on another by near-normal marine waters. Apparently coal balls had multiple origins, and the origin of the conodont-bearing ones is uncertain. INTRODUCTION Because marine fossils are commonly associated with plant fossils in some coal balls, it is not surprising that conodonts have been reported from them. A half-dozen well-pre- served conodonts from Pennsylvanian coal balls from three different States were figured by Mamay and Yochelson (1962), but no other conodonts were figured; therefore, the overall conodont content in coal balls is unknown. To better understand the distribution of conodonts and their paleoecologic impor- tance in coal balls, samples were processed from coal balls of the middle Desmoinesian Springfield Coal Member of the Petersburg Formation from the Eby Pit of Peabody Coal Company's Lynnville Mine (SW'/4 , SWA, NE'A, Sec. -
Conodont Stratigraphy and Palaeontology of the Namurian of Belgium
Mémoires pour servir à l'explication Toelichtende Verhandelingen des Cartes géologiques et minières voor de Geologische kaart en Mijnkaart de la Belgique van België MÉMOIRE No 10 VERHANDELING Nr 10 CONODONT STRATIGRAPHY AND PALAEONTOLOGY OF THE NAMURIAN OF BELGIUM BY A. C. HIGGINS and J. BOUCKAERT Department of Geology Service Géologique de Belgique University of Sheffield MINISTÈRE DES AFFAIRES ÉCONOMIQUES MINISTERIE VAN ECONOMISCHE ZAKEN ADMINISTRATION DES MINES BESTUUR VAN HET MIJNWEZEN Service Géologique de Belgique Aardkundige Dienst van België 13, Rue Jenner, 13 13, Jennerstraat, 13 BRUXELLES 4 BRUSSEL 4 Mém. Expl. Cartes Géologiques et Minières de la Belgique. 1968 N° 10 64 p 6 pl. Toelicht. Verhand. Geologische kaart en Mijnkaart van België. SERVICE GÉOLOGIQUE DE BELGIQUE MÉMOIRE N° 10 CONODONT STRATIGRAPHY AND PALAEONTOLOGY OF THE NAMURIAN OF BELGIUM BY A. C. HIGGINS and J. BOUCKAERT Department of Geology Service Géologique de Belgique University of Sheffield BRUXELLES IMPRIMERIE HAYEZ, s. p. r. 4, rue Fin 1968 SUMMARY The sequence of conodont faunas in the Namurian of Belgium is described and compared with faunas of the same age in North America, western Europe and Japan. The faunas exhibit major changes within the Namurian in the Chokerian {HI), Alportian (H2) and Kinderscoutian (Ri) sub-stages involving the appearance of new species and genera and the disappearance of many pre-existing ones. These changes take place at approximately the position of the Mississippian- Pennsylvanian boundary in North America. The palaeontology of these faunas is dealt with in detail and 47 species and sub-species have been recognised amongst which Angulodus simplex, Lonchodina bischoffi, Idiognathoides sulcata sulcata, Idiognathoides sulcata parva, Idiognathoides minuta, Streptognathodus lateralis and Gnathodus bilineatus bollandensis are considered new. -
Paper Number: 4008
Paper Number: 4008 Characterization of conodont biostratigraphy in the basal Moscovian boundary interval at the Naqing section, Loudian, Guizhou, South China Lambert, L. L.1, Qi, Y. P.2, Nemyrovska, T. I.3, Wang, X. D.2, Hu, K. Y.2, and Wang, Q. L.2 1Geological Sciences, University of Texas at San Antonio, One UTSA Circle, San Antonio, TX 78249, USA [email protected] 2State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, 39 East Beijing Road, Nanjing 210008, PR China 3Institute of Geological Sciences, National Academy of Sciences of Ukraine, O. Gonchar Str. 55-b, 01601 Kiev, Ukraine ___________________________________________________________________________ A major criterion for selecting a Global Stratotype Section and Point (GSSP) is to demonstrate depositional continuity. Depositional continuity is most often accepted where there is a transitional morphocline from an ancestral species to its descendent. The GSSP is then selected to correspond with the phylogenetic first occurrence of the descendent species. Ideally, strata elsewhere are subsequently correlated with the GSSP using the local first appearance of the descendent species, or by other taxa associated with the GSSP providing supplementary biostratigraphic data. Any other stratigraphic methods can be used for correlation once the GSSP has been ratified by the International Union of Geological Sciences Commission on Stratigraphy. Multiple conodont lineages with complete transitional morphologies characterize the Bashkirian- Moscovian boundary interval in the Naqing section. The presence of all these chronoclines through the section demonstrates depositional continuity at Naqing, and provides numerous possible conodont- based levels available for selecting a basal Moscovian GSSP. -
Lithostratigraphy, Microlithofacies, And
Lithostratigraphy, Microlithofacies, and Conodont Biostratigraphy and Biofacies of the Wahoo Limestone (Carboniferous), Eastern Sadlerochit Mountains, Northeast Brooks Range, Alaska U. S. GEOLOGICAL SURVEY PROFESSIONAL PAPER 1568 j^^^fe^i^^t%t^^S%^A^tK-^^ ^.3lF Cover: Angular unconformity separating steeply dipping pre-Mississippian rocks from gently dipping carbonate rocks of the Lisburne Group near Sunset Pass, eastern Sadlerochit Mountains, northeast Brooks Range, Alaska. The image is a digital enhancement of the photograph (fig. 5) on page 9. Lithostratigraphy, Microlithofacies, and Conodont Biostratigraphy and Biofacies of the Wahoo Limestone (Carboniferous), Eastern Sadlerochit Mountains, Northeast Brooks Range, Alaska By Andrea P. Krumhardt, Anita G. Harris, and Keith F. Watts U.S. GEOLOGICAL SURVEY PROFESSIONAL PAPER 1568 Description of the lithostratigraphy, microlithofacies, and conodont bio stratigraphy and biofacies in a key section of a relatively widespread stratigraphic unit that straddles the Mississippian-Pennsylvanian boundary UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON : 1996 U.S. DEPARTMENT OF THE INTERIOR BRUCE BABBITT, Secretary U.S. GEOLOGICAL SURVEY GORDON P. EATON, Director For sale by U.S. Geological Survey, Information Services Box 25286, Federal Center, Denver, CO 80225 Any use of trade, product, or firm names in this publication is for descriptive purposes only and does not imply endorsement by the U.S. Government. Published in the Eastern Region, Reston, Va. Manuscript approved for publication June 26, 1995. Library of Congress Cataloging in Publication Data Krumhardt, Andrea P. Lithostratigraphy, microlithofacies, and conodont biostratigraphy and biofacies of the Wahoo Limestone (Carboniferous), eastern Sadlerochit Mountains, northeast Brooks Range, Alaska / by Andrea P. Krumhardt, Anita G. Harris, and Keith F. -
Papers in Press
Papers in Press “Papers in Press” includes peer-reviewed, accepted manuscripts of research articles, reviews, and short notes to be published in Paleontological Research. They have not yet been copy edited and/or formatted in the publication style of Paleontological Research. As soon as they are printed, they will be removed from this website. Please note they can be cited using the year of online publication and the DOI, as follows: Humblet, M. and Iryu, Y. 2014: Pleistocene coral assemblages on Irabu-jima, South Ryukyu Islands, Japan. Paleontological Research, doi: 10.2517/2014PR020. doi:10.2517/2017PR023 Missourian (Kasimovian, Late Pennsylvanian) conodonts from limestone boulders, Mizuboradani Valley, Gifu Prefecture, central Japan AcceptedTAKUMI MAEKAWA1, TOSHIFUMI KOMATSU2, GENGO TANAKA3, MARK WILLIAMS4, CHRISTOPHER P. STOCKER4, MASATOSHI OKURA5 and AKIHIRO UMAYAHARA6 1Center for Water Cycle, Marine Environment, and Disaster Management, Marine Science Laboratory, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto 850-8555, Japan (e-mail: [email protected]) 2Faculty of Advanced Science and Technology, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto 860-8555, Japan ([email protected]) 3Institute of Liberal Arts and Science, Kanazawamanuscript University, Kakuma, Kanazawa, Ishikawa 920-1192, Japan (e-mail: [email protected]) 4School of Geography, Geology and Environment, University of Leicester, University Road, Leicester, LEI 7RH, UK ([email protected]) 5Naka 86, Minamiyama-cho, Konan, Aichi 483-8155, Japan 6Graduate School of Science and Technology, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto 860-8555, Japan Abstract. Two Late Pennsylvanian conodont species, Gondolella sublanceolata Gunnell and Idiognathodus sulciferus Gunnell, were extracted from limestone boulders in the Mizuboradani Valley, Fukuji district, central Japan. -
Visean – Moscovian Conodont Biostratigraphy of the Ko-Yama Limestone Group, Akiyoshi Belt, SW Japan
Natural Science Research, Univ. Tokushima (Peer-Reviewed Paper) Vol. 27, No. 3 (2013), p. 29 – 52. Visean – Moscovian conodont biostratigraphy of the Ko-yama Limestone Group, Akiyoshi Belt, SW Japan Keisuke ISHIDA 1*, Sigeyuki SUZUKI 2 and Noriyuki INADA 2,3 1 Laboratory of Geology, Institute of SAS, University of Tokushima, 770-8502, Tokushima, Japan * Corresponding author, e-mail: [email protected] 2 Graduate School of Natural Science and Technology, Okayama University, 700-8530, Okayama, Japan e-mail: [email protected] 3 Geoengineering Division of the Dia Consultants Co. Ltd., 331-0811, Saitama, Japan e-mail: [email protected] __________________________________________________________________________________________ Abstract Carboniferous clastic carbonates associated with basaltic pyroclasts and spicular chert beds in the lower part of the Ko-yama Limestone Group contain the Visean – Moscovian conodont succession of Gnathodus semiglaber (late Visean), Gnathodus praebilineatus – Lochriea multinodosa (late Visean), Lochriea ziegleri – Gnathodus girtyi girtyi s.l. (early Serpukhovian), Neoganthodus symmetricus – Idiognathodus primulus (middle – late Bashkirian), and Idiognathoides convexus – Gondolella clarki (early Moscovian). The FAD of Lochriea ziegleri marks the Visean/Serpukhovian boundary in the section. The middle – late Bashkirian Neoganthodus symmetricus – Idiognathodus primulus Fauna is a mixed fauna containing reworked Serpukhovian and older elements possibly related to an erosional event after the Early Bashkirian global eustatic low-stand. The revision of conodont zonal correlation in the Akiyoshi Belt was examined with the Mississippian/Pennsylvanian boundary considering the FAD of Declinognathodus noduliferus in the previously proposed zones in the similar Hina, Atetsu, Akiyoshi and Omi limestone groups. Idiognathodus craticulinodosus n. sp. was described as the middle – late Bashkirian to early Moscovian index. -
First Occurrence of Ellisonia, Gondolella and Ubinates (Conodonts) in Itaituba Formation, Pennsylvanian of Amazonas Basin, Brazil
6(2):56-62, jul/dez 2010 © Copyright 2010 by Unisinos - doi: 10.4013/gaea.2010.62.01 First occurrence of Ellisonia, Gondolella and Ubinates (Conodonts) in Itaituba Formation, Pennsylvanian of Amazonas Basin, Brazil Sara Nascimento, Valesca Brasil Lemos Universidade Federal do Rio Grande do Sul. Av. Bento Gonçalves, 9500, Prédio 43.127, sala 211, 91501-470, Porto Alegre, RS, Brasil. [email protected], [email protected] Ana Karina Scomazzon Universidade Federal de Pelotas. Rua Domingos Rodrigues, 2, 96010-440, Pelotas, RS, Brasil. [email protected] Nilo Siguehiko Matsuda PETROBRAS/E&P-EXP/GEO/ES. Av. Chile, 330, Edifício Ventura, 13º andar, 20031-170, Rio de Janeiro, RJ, Brasil. [email protected] Cristiane Pakulski da Silva Universidade Federal do Rio Grande do Sul. Av. Bento Gonçalves, 9500. Prédio 43.127, sala 211, 91501-470, Porto Alegre, RS, Brasil. [email protected] ABSTRACT This paper analyzes and describes a fi rst occurrence of the conodonts Ellisonia, Gondolella and Ubinates in Amazonas Basin, North of Brazil. The recovered material comes from two outcrops along the Tapajos River and from a limestone quarry of Itaituba Formation, whose levels are in- cluded in the Itaituba Formation, with a Pennsylvanian age. Those conodonts are relevant paleoecological indicators of water depth, salinity and environmental energy and have implications in the Late Carboniferous to Triassic biostratigraphy. The fossil remains represent M and S conodont elements, associated to Pa elements of the Idiognathodus, Idiognathoides, Neognathodus, Adetognathus, Hindeodus and Diplognathodus genus. Key words: conodonts, Amazonas Basin, Itaituba Formation, Pennsylvanian. RESUMO PRIMEIRA OCORRÊNCIA DOS GÊNEROS ELLISONIA, GONDOLELLA E UBINATES (CONODONTS) PARA A FORMAÇÃO ITAITUBA, PENSILVANIANO DA BACIA DO AMAZONAS, BRASIL.