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Cretaceous Ammonites) from Futaba, Northeast Japan*

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Trans. Proc. Palaeont. Soc. Japan. N.S., No. 56, pp, 322-331, pl. 48. Dec. 20, 1964 480. YABEICERA S (CRETACEOUS AMMONITES) FROM FUTABA, NORTHEAST JAPAN* TATSUR0 MATSUMOTO Department of Geology. Kyushu University IKUWO OBATA Department of Palaeontology. National Science Museum and SHIRO MAEDA and TERUO SATO Geological Institute, Chiba University 東 北 日本 双 葉 産 ヤ ベ イセ ラス(白ll巨紀 ア ソモナ イ の:上 部 臼亜 系 浦河 統 ド郷階 に属 す る 双 奨 層 ド部の礫 岩 層 か ら 産 したYabeiceras orientale ToKUNAGA and SHIMIZUの 完 模式 標 本は,東 京 空 襲 の時 に 残念 な が ら焼 失 した とみな され る。 そ こ で原 産 地 か ら さ らに 標 本 を 得 よ うと努 力 して きた 。数 年 前 に 小畠 は小 型の 幼 殻 を 得 て い た 。 最近 前 田 の 引 率 し た巡 検旅 行 中 に.佐 藤 が 幸 に も成1ド殻の 化 石 を 採 集 した。 これ ら に っ い て くわ しい 古 生 物学 的 記 載 を行 な い, Yabeicerasの 類 縁 関 係 に')い て 論 述 す る 。 捕 属 の幼`騰 ～はForrosteriaに 似 た点 が あ る 。 ま たEborceras BASSE.1946はYabeiceras TOKUNAG and SHIMIZU.1926の シ ノニ ムで あ る,F.もE.も 従 来Barroisiceralinaeに 入れ られ て い る,記 載 した 標 本 は九 州 大 学 に 保 管 す る。 1965年 に 矢 部長 克 光生 は 数 え の88歳 に な られ ます 。 謹 ん で お 複 い し.こ の 小 著 を先 生 に 献 げ ます 。 松 本 達 斑 ・小 畠 郁 生 ・前 田 四 郎 ・佐 藤 輝 夫 Introduction occasion. The original type specimens described TOKUNAGA and SHIMIZU (1926) des- by TOKUNAGA and SHIMIZU (1926), most cribed a number of Cretaceous fossils of which must have been preserved at from the Futaba Formation in the Joban the Waseda University, Tokyo, together coalfield, about 200 km to the north- with other fossils from the Joban area. northeast of Tokyo. This was an admir- are judged to have been burnt up by a able contribution to our knowledge in fire of World War 11, 1944, except for a that the Upper Cretaceous deposits were few specimens which have been for some recognized on the evidence of fossils reason deposited at the Tohoku Uni- underneath the coal-bearing Tertiary of versity, Sendai. This judgement is based the Joban area and that some of the on the replies given to the writers from described species were entirely new to the Faculty Members of Waseda Uni- science. Yabeiceras, an interesting am- versity, Tohoku University and the Uni- monite genus, was established on that versity of Tokyo and also Dr. H. YABE. Received August 20. 1964 ; read Sept. The holotype, by monotypy, of Yabei- 20. 1964. ceras orientale TOKUNAGA and SHIMIZU 322 480. Yabeiceras (Cretaceous Ammonites) 323 (1926, p. 201, pl. 22, fig. 7 ; pl. 27, fig. la- CHIDA and Dr. Masafumi MURATA for c), the type-species of Yabeiceras TOKU- giving them information about where- NAGA and SHIMIZU, 1926 (originally de- abouts of TOKUNAGA and SHIMIZU'S signated in p. 199), and the type-speci- types, and to Mr. C. W. WRIGHT in mens of other two species, Y. kotoi and London for his critical reading of the Y. himuroi, of the same genus were typescript. Dr. ltaru HAYAMI took pho- probably destroyed. This regrettable tographs at Kyushu University and Miss situation has given to palaeontologists Tomoko Mn AZAKI assisted in preparing some difficulty in the appropriate deter- the manuscript. mination of the systematic position of the genus as well as in the correct identification of the species. Description The two senior authors (T. M. and Yabeiceras orientate TOKUNAGA 1.0.), therefore, have endeavoured to get specimens of Yabeiceras from the type- and SHIMIZU locality, upper reaches of Sakurazawa PI. 48. Figs. la-c. 2a-e ; in Oriki, where Lower Member of the Text-figs. la-d, 2a-e, 3. Futaba Formation is exposed. Although bivalves occur there in abundance. am- 1926. Yabeiceras orientate TOKUNAGAand monites are quite rare. Only a small. Shimizu, Jour. Fac. Sci., Imp. Univ. To- kyo. Sect. II, Vol. 1. Pt. 6, p. 201, p1. probably immature specimen of Yabei- 22. fig. 7; pl. 27, fig. la-c. ceras orientale and a few heteromorpha 1926. Yabeiceras orientate. SHIMIZU, Proc. have been collected there. Imp. Acad.. Japan. Vol. 2, No. 10. p. In summer 1963, the third author (S. M.) 547. conducted a departmental excursion to Types-The holotype is the specimen the Futaba area. After six days field described and figured by TOKUNAGA and work by a group of thirteen students. SHIMIZU (1926, indicated above), which an adult ammonite which was unfamiliar was almost certainly destroyed in 1944. to them was finally acquired at the same A neotype has to be officially proposed locality by the last author (T. S.). a and its validity should be acknowledged. student. The specimen was brought to Material:—The two specimens to be the Department of Palaeontology, Natio- described in this paper are GK. H5556, nal Science Museum. Tokyo and shown an internal mould of an adult shell to the second author (1. O.), who told (Coll. S. MAEDA and T. SATO), and GK. him its significance. It was developed H5557, that of an immature shell (Coll. from the rock matrix and cleaned in a I. OBATA).They are preserved in the laboratory of Chiba University and then Type-Specimen Room, Departmet of donated to Kyushu University for fur- Geology, Kyushu University, Fukuoka. ther palaeontological study. The rock matrix is made up of calcare- This paper contains the description ous sandstone. Therefore the fossils are and illustration of the two specimens. secondarily little deformed. On some Before going further the writers wish part an inner layer of the test is pre- to acknowledge the debt of gratitude to served. The innermost nuclear part and Prefessor Emeritus Hisakatsu YABE, a half of the body-whorl of the first Professors Kotora HATAI, Sadajiro TSU- specimen are not preserved. The un- 324 Tatsztro MATSUMOTO et al. illustrated side of the shell is dissolved Glvcymeris and other bivalves are ac- and hardly separable from the rock cumulated. matrix in which shells of Apiotrigonia, Measurements (in millimeters):- Specimen [Part] Diameter Umbilicus Height Breadth .) (C.)B./H. (Interc(I.) (Costal) GK. H5556 123.0(1) 59.4(0.48) 39.6 15.8x2 0.8 [3/2 vol. early] 52.0(1) 23.0(0.44) 17. 3(0.33) 27. 5(0.53) 23. 5(0.49) 1.58 1.47 [2 vol...] -- 15.5 20.0 15.51.29 1.0 [3 vol.,.]c. 40.0(1) 16.0(0.4) 12.5(0.31) 16.2(0.40) 13.2(0.33) 1.29 1.05 GK. 115557 29.6(1) 9.5(0.32) 12.0(0.40) 14.5(0.48) 12.3(0.41) 1.20 1.02 vol...]-- [L 10.612.3 10.81.16 1.01 [4 vol.,.] 20.4(1) 6.4(0.31) 8.8(0.43) 10.8(0.53) 9.4(0.46) 1.22 1.06 Holotype(T. & SH.) 62 26(0.41) 22(0.35) 26 (0.42)1.18 Description :-The characters of the ribs extending radially from the tubercle shell of this species change to a large to near the umbilical margin without extent with growth, as has been already umbilical tubercles. secondary ribs bifur- mentioned by TOKUNAGA and SHIMlZU cating from the mediolateral tubercles (1926) and SHIMIZU (1926). The change with a moderate projection on the venter, may be shown more clearly, at least in and weak tubercles at the ventrolateral some respects, by the present two speci- shoulder on the secondary ribs. A low mens than by the holotype. There may siphonal keel is weakly undulated ; each be also a certain extent of variation undulation corresponds in number and within a species. Even if the shells of position with one of the secondary ribs the same diameter are brought into which form obtuse chevrons on the comparison, they may be somewhat dis- venter. The lateral tubercles on the similar. anterior part of the preserved last whorl The smaller specimen, GK. 1-15557 (P1. of this specimen are rather mammillate 48, Fig. la-c ; Text.fig. la-d), probably and on the rest part they are bullate, represents a young shell. It is about although this is the character observed 30 mm. in diameter and is wholly septate. on the internal mould. It has an umbilicus of moderate size On the next inner whorl of the same (about 31 percent of the diameter). It specimen distant, weak radial ribs, which is moderately involute, about a half of are broadened and elevated at the medio- the inner whorl being overlapped by the lateral tubercles are observable. The outer. The whorl of this stage is nearly tubercles look subangular and in contact as high as broad and subcircular in the with the steep umbilical wall of the intercostal section, but it is somewhat outer whorl. A siphonal keel, lateral broader than high and rather polygonal tubercles and ribs seem to appear at in costal section. The ornament in this about the shell diameter of 9 mm. The stage consists of fairly strong tubercles flanks are somewhat flattened and the at about the middle of the flank (i. e. venter is low, roof-shaped in this stage, slightly below the mid-height), about although the details of the venter are eight in a half volution, simple, blunt not clearly seen.
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    ARTICLES De®nition of Late Cretaceous Stage Boundaries in Antarctica Using Strontium Isotope Stratigraphy J. M. McArthur, J. A. Crame,1 and M. F. Thirlwall2 Department of Geological Sciences, University College London, Gower Street, London WC1E 6BT, United Kingdom (e-mail: [email protected]) ABSTRACT New 87Sr/86Sr analyses of macrofossils from 13 key marker horizons on James Ross and Vega Islands, Antarctica, allow the integration of the Antarctic Late Cretaceous succession into the standard biostratigraphic zonation schemes of the Northern Hemisphere. The 87Sr/86Sr data enable Late Cretaceous stage boundaries to be physically located with accuracy for the ®rst time in a composite Southern Hemisphere reference section and so make the area one of global importance for documenting Late Cretaceous biotic evolution, particularly radiation and extinction events. The 87Sr/86Sr values allow the stage boundaries of the Turonian/Coniacian, Coniacian/Santonian, Santonian/Campanian, and Campanian/Maastrichtian, as well as other levels, to be correlated with both the United Kingdom and United States. These correlations show that current stratigraphic ages in Antarctica are too young by as much as a stage. Immediate implications of our new ages include the fact that Inoceramus madagascariensis, a useful fossil for regional austral correlation, is shown to be Turonian (probably Late Turonian) in age; the ªMytiloidesº africanus species complex is exclusively Late Coniacian in age; both Baculites bailyi and Inoceramus cf. expansus have a Late Con- iacian/Early Santonian age range; an important heteromorph ammonite assemblage comprising species of Eubostry- choceras, Pseudoxybeloceras, Ainoceras, and Ryugasella is con®rmed as ranging from latest Coniacian to very earliest Campanian.
  • Ammonite Faunal Dynamics Across Bio−Events During the Mid− and Late Cretaceous Along the Russian Pacific Coast

    Ammonite Faunal Dynamics Across Bio−Events During the Mid− and Late Cretaceous Along the Russian Pacific Coast

    Ammonite faunal dynamics across bio−events during the mid− and Late Cretaceous along the Russian Pacific coast ELENA A. JAGT−YAZYKOVA Jagt−Yazykova, E.A. 2012. Ammonite faunal dynamics across bio−events during the mid− and Late Cretaceous along the Russian Pacific coast. Acta Palaeontologica Polonica 57 (4): 737–748. The present paper focuses on the evolutionary dynamics of ammonites from sections along the Russian Pacific coast dur− ing the mid− and Late Cretaceous. Changes in ammonite diversity (i.e., disappearance [extinction or emigration], appear− ance [origination or immigration], and total number of species present) constitute the basis for the identification of the main bio−events. The regional diversity curve reflects all global mass extinctions, faunal turnovers, and radiations. In the case of the Pacific coastal regions, such bio−events (which are comparatively easily recognised and have been described in detail), rather than first or last appearance datums of index species, should be used for global correlation. This is because of the high degree of endemism and provinciality of Cretaceous macrofaunas from the Pacific region in general and of ammonites in particular. Key words: Ammonoidea, evolution, bio−events, Cretaceous, Far East Russia, Pacific. Elena A. Jagt−Yazykova [[email protected]], Zakład Paleobiologii, Katedra Biosystematyki, Uniwersytet Opolski, ul. Oleska 22, PL−45−052 Opole, Poland. Received 9 July 2011, accepted 6 March 2012, available online 8 March 2012. Copyright © 2012 E.A. Jagt−Yazykova. This is an open−access article distributed under the terms of the Creative Com− mons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
  • Cartografía Geologica En El Área De Temalac En Los Estados De Puebla Y Guerrero

    Cartografía Geologica En El Área De Temalac En Los Estados De Puebla Y Guerrero

    INSTITUTO POLITÉCNICO NACIONAL ESCUELA SUPERIOR DE INGENIERÍA Y ARQUITECTURA CIENCIAS DE LA TIERRA UNIDAD TICOMAN CARTOGRAFÍA GEOLOGICA EN EL ÁREA DE TEMALAC EN LOS ESTADOS DE PUEBLA Y GUERRERO PARA OBTENER EL TITULO DE: INGENIERO GEÓLOGO OPCION: EXPERIENCIA PROFESIONAL P R E S E N T A : RAMÍREZ GARCÍA MARÍA GEORGINA Asesor interno: Ing. René Alejandro Téllez Flores Asesor Externo: Dr. Juan Carlos Salinas Prieto CIUDAD DE MEXICO AGOSTO 2016 El fracaso nunca es definitivo. Tu eres un fracasado hasta que renuncies, y siempre es demasiado pronto para renunciar! No determinas la grandeza de una persona por su talento, su riqueza o su educación. Determinas la grandeza de una persona por lo que se necesita para desanimarlo. Así, ¿que es lo se necesita para desanimarte de ir en busca de tu sueño? Puede ser tan simple como un amigo o pariente o miembro de la familia diciendote “No creo que eso sea una buena idea” ESIA TICOMAN CIENCIAS DE LA TIERRA I.P.N. AGRADECIMIENTOS A mi Madre Rita Gloria García Pérez quien siempre ha estado a mi lado apoyandome en mis buenas y malas decisions. Gracias por ser mi complice e impulsarme a seguir estudiando y nunca dejarme caer. Gracias por tu fortaleza, tu ánimo, por tu corazón y por tus brazos que siempre me han sostenido y sobre todo por todo tu amor. Gracias por creer en mi. A mi Padre Daniel Ramírez Flores. A pesar de que ya no estás a mi lado se que estarías muy orgulloso de mi, del paso tan importante que al fin pude concretar y que gracias a tu entusiasmo cuando platicabamos de lo que era mi trabajo y veía en tus ojos el orgullo y amor me impulsaban a seguir y dar lo mejor de mi.
  • Palaeontology of the Middle Turonian Limestones of the Nysa Kłodzka Graben

    Palaeontology of the Middle Turonian Limestones of the Nysa Kłodzka Graben

    Palaeontology of the Middle Turonian limestones of the Nysa Kłodzka Graben... Geologos 18, 2 (2012): 83–109 doi: 10.2478/v10118-012-0007-z Palaeontology of the Middle Turonian limestones of the Nysa Kłodzka Graben (Sudetes, SW Poland): biostratigraphical and palaeogeographical implications Alina Chrząstek Institute of the Geological Sciences, Wrocław University, Maksa Borna 9, PL 50-204 Wrocław, Poland; e-mail: [email protected] Abstract The ammonites Lewesiceras peramplum Mantell and ?Lewesiceras sp. are reported from the Upper Cretaceous in the Nysa Kłodzka Graben; they date from the Middle Turonian and ?Coniacian, respectively. The Middle Turonian lime- stones of the Stara Bystrzyca quarry contain an abundant assemblage of inoceramids (Inoceramus cuvieri Sowerby and I. lamarcki Parkinson) and other bivalves, including oysters, as well as brachiopods and trace fossils. Micropalaeonto- logical data show the presence of foraminifers and siliceous sponge spiculae, bryozoans, ostracods and fragments of bivalves and gastropods. The Middle Turonian calcareous deposits belongs to the upper part of the Inoceramus lamarcki Zone (late Middle Turonian) and were deposited on a shallow, subtidal offshore shelf. They overlie the Middle Turo- nian Bystrzyca and Długopole Sandstones, which represent foreshore-shoreface delta deposits. The fossil assemblage suggests a moderate- to low-energy, normal-salinity environment with occasionally an oxygen deficit. Keywords: Middle Turonian, Sudetes, Nysa Kłodzka Graben, ammonites, inoceramids, biostratigraphy 1. Introduction Stara Bystrzyca quarry. It is, with its diameter of approx. 45 cm, probably the biggest ammo- Representatives of the ammonite genus nite ever found in Nysa Kłodzka Graben and Lewesiceras are most typical of the Middle-Late probably also in the Sudety Mountains (Fig.