DOCSLIB.ORG

Armatites Kaufmanni N. Sp., the First Late Devonian Goniatite with Ventral Spines

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Armatites Kaufmanni N. Sp., the First Late Devonian Goniatite with Ventral Spines See discussions, stats, and author profiles for this publication at: https://www.researchgate.net/publication/260719399 Armatites kaufmanni n. sp., the first Late Devonian goniatite with ventral spines Article in Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen · March 2014 DOI: 10.1127/0077-7749/2014/0393 CITATIONS READS 2 119 1 author: Dieter Korn Museum für Naturkunde - Leibniz I… 297 PUBLICATIONS 2,712 CITATIONS SEE PROFILE All in-text references underlined in blue are linked to publications on ResearchGate, Available from: Dieter Korn letting you access and read them immediately. Retrieved on: 02 September 2016 N. Jb. Geol. Paläont. Abh. 271/3 (2014), 349–352 Article E Stuttgart, March 2014 Armatites kaufmanni n. sp., the first Late Devonian goniatite with ventral spines Dieter Korn With 2 figures Abstract: Armatites kaufmanni n. sp. is described from an early Famennian (Late Devonian) oc- currence of Braunau (Ense near Bad Wildungen) in the Rhenish Mountains Germany). It is the first goniatitic ammonoid with ventral shell extensions in the form of two rows of prominent, laterally flattened spines. Key words: Ammonoidea, Famennian, Rhenish Mountains, shell sculpture. 1. Introduction shell extensions. They occur often in species, in which a flattened or concave venter is separated from the flanks The development of shell extensions in the form of by an angular margin. The oldest of these is the late longitudinal skids, ventrolateral or ventral parabolic Early Devonian genus Gyroceratites v. Meyer, 1831, ribs and spines is a repeated process in the evolution of but they become more important in the Famennian. the Devonian and earliest Carboniferous ammonoids. Here, goniatitic as well as clymeniid genera with vent- These shell extensions occur in various clades at vari- rolateral skids occur independently in various families, ous geological times and are obviously much more e.g. the Tornoceratidae (genus Armatites BeCker, 1993), common than in stratigraphically younger ammonoids Kosmoclymeniidae (genera Protoxyclymenia sChinde- (e.g., CheCa & Martin-raMos 1989). wolf, 1923 and Kosmoclymenia hyatt, 1884) and Cy- Here I describe a new occurrence of spines in the maclymeniidae (genus Laganoclymenia ni kola eva & early Famennian (Late Devonian) ammonoid Armatites Bogoslovsky, 2005). Finally the basal Carboniferous kaufmanni n. sp. (Fig. 1). The slender isolated spines are family Prolecanitidae (genus Eocanites liBrovitCh, arranged in two ventrolateral rows and are developed 1957) also displays such conch morphology. out of an external band that is delimited by skids as The development of ventrolateral skids is some- known from Armatites planidorsatus (Münster, 1839). times the intermediate stage towards more complex shell extensions such as prominent hollow parabolic 2. Devonian ammonoids with spines nodes known from the Kosmoclymeniidae in the pro- posed lineage Rodeckia – Protoxyclymenia – Kos- Shell extensions in Devonian ammonoids can be at- moclymenia (korn 1979; korn & PriCe 1987). A sim- tributed to two major classes, (1) ventrolateral longi- ilar shell structure has been described from the Cy- tudinal skids, which may be transformed into isolated maclymeniidae in the probable lineage Cymaclymenia hollow parabolic nodes, and (2) the so-called ‘para- – Laganoclymenia (ni kola eva & Bogoslovsky 2005). bolic ears’, which typically evolve from ventrolateral Among the goniatites, it is particularly the genus excursions of the aperture and may transform into dis- Armatites, from which extended ventrolateral skids tinct and sharp spines. have been reported. terMier & terMier (1948) figured Ventrolateral skids are most common among the a specimen of ‘Pseudoclymenia planidorsata’ (= Arm- ©2014 E. Schweizerbart’sche Verlagsbuchhandlung, Stuttgart, Germany www.schweizerbart.de DOI: 10.1127/0077-7749/2014/0393 0077-7749/2014/0393 $ 1.00 350 D. Korn Fig. 1. Armatites kaufmanni n. sp., holotype MB.C.22702 from the Ense near Braunau. A – Lateral view, x 1.5. B – Close- up of the ventrolateral area, x 3.0. atites planidorsatus) from a locality near the mine at Included species: Goniatites planidorsatus Münster, 1839 ‘Mefis’ in the vicinity of Taouz (Anti-Atlas, Morocco). (Franconia); Tornoceras lateroconcavum dyBCzynski, This specimen was figured with prominent continuous 1913 (Holy Cross Mountains); Armatites beatus BeCker, 1993 (Rhenish Mountains); Armatites nudus BeCker, 1993 ventrolateral skids, which reach a height of 30 % of the (Rhenish Mountains); Armatites kaufmanni n. sp. (Rhenish whorl height (Fig. 2). Mountains). Parabolic nodes are well-known from clymeniids of the suborder Clymeniina, where they occur in vari- Remarks: Armatites has a wide geographic distribution in ous families, e.g. the Platyclymeniidae (genera Trigo- North Africa (Morocco, Algeria; terMier & terMier 1950; Petter 1959; BeCker 1993; Belka et al. 1999), the Mon- noclymenia Chindewolf Spinoclymenia og s , 1934, B - tagne Noire (BeCker 1993), the Rhenish Mountains (wede- oslovsky, 1960 and Progonioclymenia sChindewolf, kind 1908; BeCker 1993), the Harz Mountains (Born 1912), 1937) and the Gonioclymeniidae (genera Gonioclyme- the Thuringian Mountains (Münster 1839; sChindewolf nia hyatt, 1884 and Kalloclymenia hyatt, 1884). 1923b), Saxony (geinitz 1853; freyer 1957), the Carnic A mode of shell extensions, which can not be attribut- Alps of Austria (flügel & kroPfitsCh-flügel 1965; BeCk- er 1993), the Holy Cross Mountains (dyBCzynski 1913; ed to the two classes are the ventral spines in Karadzhar- soBolev 1914a, 1914b; dzik 2006), and the South Urals ia korn, 2002 (= Bellaclymenia BeCker, 2002). In K. ex- (Perna 1914; nalivkina 1953; Bogoslovsky 1971). Most cellens (Bogoslovsky, 1982), an oxyconic conch shape is of these reports refer to only one single species Armatites connected with striking triangular ventral spines. planidorsatus, and most of the stratigraphically well-de- fined occurrences have an early Famennian (“Cheiloceras Stufe”) age. According to BeCker (1993, p. 230), specimens 3. Systematic Palaeontology of Armatites occur typically in the younger part of the “Cheiloceras Stufe”. However, a younger stratigraphic age of some of the occurrences (particularly in the South Urals) Order Goniatitida hyatt, 1884 appears to be possible (Bogoslovsky 1971). Suborder Tornoceratina wedekind, 1914 BeCker (1993) attributed most of the occurrences to the Superfamily Tornoceratoidea v. arthaBer, 1911 species A. planidorsatus. His two new species A. nudus and Family Tornoceratidae v. arthaBer, 1911 A. beatus, which are characterised by weaker and stronger steinkern constrictions, respectively, are so far only known Subfamily Aulatornoceratinae BeCker, 1993 from the Rhenish Mountains. Genus Armatites BeCker, 1993 Diagnosis: Genus of the subfamily Aulatornoceratinae, in Armatites kaufmanni n. sp. which the venter is flattened or concave. The venter is char- Fig. 1 acterised by a ventral band delimited by longitudinal skids, which are occasionally transformed into singular spines. Etymology: After hartMut kaufMann (Burgwald), the The flanks are flattened and concave in some species. finder of the specimen. Armatites kaufmanni n. sp., the first Late Devonian goniatite with ventral spines 351 The reconstruction of a specimen of “Pseudoclymenia planidorsata” from the Anti-Atlas figured by terMier & terMier (1948) shows long continuous ventrolateral skids, which differ in this expression from the isolated spines in A. kaufmanni. The specimen from Morocco has a narrower umbilicus (uw/dm = 0.08) than the new species and hence may not be conspecific. Acknowledgements I am grateful to hartMut kaufMann (Burgwald) for pro- viding the specimen for description. dieter weyer (Ber- lin) is acknowledged for the determination of the conodonts Fig. 2. Reproduction of the illustration showing the Arma- and sonny a. walton (Berlin) for reading the manuscript. tites specimen figured as “Pseudoclymenia planidorsata” kevin Bylund (Spanish Fork, Utah) and günter sChwei- by terMier & terMier (1948). gert (Stuttgart) kindly reviewed the manuscript. References arthaBer, g. v. (1911): Die Trias von Albanien. – Beiträge zur Paläontologie Österreich-Ungarns und des Orients, Holotype: Specimen MB.C.22702 (kaufMann Coll.), illus- 24: 169-288. trated in Fig. 1. BeCker, R.T. (1993): Stratigraphische Gliederung und Am- monoideen-Faunen im Nehdenium (Oberdevon II) von Type locality and horizon: Ense near Braunau (Bad Wil- Europa und Nord-Afrika. – Courier Forschungsinstitut dungen area, Kellerwald); most probably Praemeroceras pet- Senckenberg, 155: 1-405. terae Zone. A few accompanying conodonts were determined BeCker, r.t., house, M.r., BoCkwinkel, J., eBBighausen, by dieter weyer as Palmatolepis glabra prima ziegler & v. & aBoussalaM, Z.S. (2002): Famennian ammonoid huddle, 1969 (species and subspecies concept of ziegler & zones of the eastern Anti-Atlas (southern Morocco). – huddle 1969), thus confirming the stratigraphic age. Münstersche Forschungen zur Geologie und Paläonto- logie, 93: 159-205. Diagnosis: Species of the genus Armatites with flattened, Belka, z., klug, C., kaufMann, B., korn, d., döring, s., subparallel flanks and a narrow umbilicus (uw/dm = 0.13). feist, r. & wendt, H. (1999): Devonian conodont and Margin of the ventral band occupied by prominent and iso- ammonoid succession of the eastern Tafilalt (Ouidane lated flat spines. Chebbi section), Anti-Atlas, Morocco. – Acta Geologica Polonica, 49: 1-23. Description: The holotype is the only available specimen. Born,
Load more

Recommended publications
  • Suture with Pointed Flank Lobe and ... -.: Palaeontologia Polonica
    210 JERZY DZIK Genus Posttornoceras Wedekind, 1910 Type species: Posttornoceras balvei Wedekind, 1910 from the mid Famennian Platyclymenia annulata Zone of the Rhenisch Slate Mountains. Diagnosis. — Suture with pointed flank lobe and angular or pointed dorsolateral lobe. Remarks. — Becker (1993b) proposed Exotornoceras for the most primitive members of the lineage with a relatively shallow dorsolateral lobe. The difference seems too minor and continuity too apparent to make this taxonomical subdivision practical. Becker (2002) suggested that this lineage was rooted in Gundolficeras, which is supported by the data from the Holy Cross Mountains. The suture of Posttornoceras is similar to that of Sporadoceras, but these end−members of unrelated lin− eages differ rather significantly in the geometry of the septum (Becker 1993b; Korn 1999). In Posttornoceras the parts of the whorl in contact with the preceding whorl are much less extensive, the dorsolateral saddle is much shorter and of a somewhat angular appearance. This is obviously a reflection of the difference in the whorl expansion rate between the tornoceratids and cheiloceratids. Posttornoceras superstes (Wedekind, 1908) (Figs 154A and 159) Type horizon and locality: Early Famennian at Nehden−Schurbusch, Rhenish Slate Mountains (Becker 1993b). Diagnosis. — Suture with pointed tip of the flank lobe and roundedly angulate dorsolateral lobe. Remarks.—Gephyroceras niedzwiedzkii of Dybczyński (1913) from Sieklucki’s brickpit was repre− sented by a specimen (probably lost) significantly larger than those described by Becker (1993b). The differ− ence in proportions of suture seem to result from this ontogenetic difference, that is mostly from increase of the whorl compression with growth. Distribution. — Reworked at Sieklucki’s brickpit in Kielce.
    [Show full text]
  • ABHANDLUNGEN DER GEOLOGISCHEN BUNDESANSTALT Abh
    ©Geol. Bundesanstalt, Wien; download unter www.geologie.ac.at ABHANDLUNGEN DER GEOLOGISCHEN BUNDESANSTALT Abh. Geol. B.-A. ISSN 0016–7800 ISBN 3-85316-14-X Band 57 S. 167–180 Wien, Februar 2002 Cephalopods – Present and Past Editors: H. Summesberger, K. Histon & A. Daurer Morphometric Analyses and Taxonomy of Oxyconic Goniatites (Paratornoceratinae n. subfam.) from the Early Famennian of the Tafilalt (Anti-Atlas, Morocco) VOLKER EBBIGHAUSEN, RALPH THOMAS BECKER & JÜRGEN BOCKWINKEL*) 13 Text-Figures and 1 Table A contribution to IGCP 421 Morocco Upper Devonian Ammonoids Morphometry Taxonomy Contents Zusammenfassung ...................................................................................................... 167 Abstract ................................................................................................................. 167 1. Introduction ............................................................................................................. 169 2. Locality and Methods .................................................................................................... 169 3. Morphometric Analyses of Dar Kaoua Paratornoceratinae ................................................................. 170 3.1. Size Distribution .................................................................................................... 170 3.2. Shell Parameters ................................................................................................... 172 4. Systematics ............................................................................................................
    [Show full text]
  • Size Distribution of the Late Devonian Ammonoid Prolobites: Indication for Possible Mass Spawning Events
    Swiss J Geosci (2010) 103:475–494 DOI 10.1007/s00015-010-0036-y Size distribution of the Late Devonian ammonoid Prolobites: indication for possible mass spawning events Sonny Alexander Walton • Dieter Korn • Christian Klug Received: 17 December 2009 / Accepted: 18 October 2010 / Published online: 15 December 2010 Ó Swiss Geological Society 2010 Abstract Worldwide, the ammonoid genus Prolobites is Abbreviations only known from a few localities, and from these fossil SMF Senckenberg Museum, Frankfurt a. M., Germany beds almost all of the specimens are adults as shown by the MB.C. Cephalopod collection of the Museum fu¨r presence of a terminal growth stage. This is in marked Naturkunde Berlin (the collections of Franz contrast to the co-occurring ammonoid genera such as Ademmer, Werner Bottke, and Harald Simon Sporadoceras, Prionoceras, and Platyclymenia. Size dis- are incorporated here) tribution of specimens of Prolobites from three studied localities show that, unlike in the co-occurring ammonoid species, most of the material belongs to adult individuals. The morphometric analysis of Prolobites delphinus Introduction (SANDBERGER &SANDBERGER 1851) demonstrates the intra- specific variability including variants with elliptical coiling The mid-Fammenian (Late Devonian) ammonoid genus and that dimorphism is not detectable. The Prolobites Prolobites is only known from a few localities worldwide, material shows close resemblance to spawning populations mainly in the Rhenish Mountains and the South Urals. of Recent coleoids such as the squid Todarodes filippovae Where it does occur, the majority of the specimens show a ADAM 1975. Possible mass spawning events are discussed terminal growth stage suggesting that these are adults.
    [Show full text]
  • Geologie Und Paläontologie in Westfalen
    Geol. Paläont. 15 Abb. Münster 15 11 - 69 Westf. 15 Taf. Dezember 1989 Weitere Goniatiten aus dem Ober-Vise des Sauerlandes (Cephalopoda, Ammonoidea; Unterkarbon; Rheinisches Schiefergebirge) Dieter Korn* Kurzfassung: 20 Goniatiten-Arten aus dem Ober-Vise des nördlichen, nordöstlichen und östlichen Rheini­ schen Schiefergebirges werden abgebildet und detailliert beschrieben. Nah verwandte Arten werden verglichen. Abstract: 20 goniatite species from the Upper Visean of the northern, northeastern and eastern Rhenish Massif are figured and described in detail. The relationships of relative species are treated. 1nhaltsverzeich n is Seite Einleitung ....... 12 Fundstellenbeschreibung 13 Dank .......... 14 Material ........ 14 Systematischer Teil .. 17 Ordnung Prolecanitida MILLER & FURNISH 1954 17 Unterordnung Prolecanitina MILLER & FURNISH 1954 17 Überfamilie Prolecanitaceae HYATT 1884 .. 17 Familie Prolecanitidae HYATT 1884 .... 17 Unterfamilie Prolecanitinae HYATT 1884 . 17 Prolecanites MOJSISOVICS 1882 ... 17 Prolecanites (?) sp. ........ 17 Überfamilie Medlicottiaceae KARPINSKIY 1889 18 Familie Pronoritidae FRECH 1901 .. 18 Pronorites MOJSISOVICS 1882 . 18 Pronorites molaris KORN 1988 .. 18 Pronorites sp. ......... 19 Ordnung Goniatitida HYATT 1884 ........ 20 Unterordnung Tornoceratina WEDEKIND 1918 20 Überfamilie Prionocerataceae HYATT 1884 20 Familie Prionoceratidae HYATT 1884 .. 20 lrinoceras RUZHENTSEV 1947 20 lrinoceras latecostatum (NICOLAUS 1963) 20 Unterordnung Goniatitina HYATT 1884 ......... 20 * Anschrift des Verfassers: Dieter
    [Show full text]
  • Jahrbuch Der Geologischen Bundesanstalt
    ZOBODAT - www.zobodat.at Zoologisch-Botanische Datenbank/Zoological-Botanical Database Digitale Literatur/Digital Literature Zeitschrift/Journal: Jahrbuch der Geologischen Bundesanstalt Jahr/Year: 2018 Band/Volume: 158 Autor(en)/Author(s): Schönlaub Hans-Peter Artikel/Article: Review of the Devonian/Carboniferous boundary in the Carnic Alps 29- 47 JAHRBUCH DER GEOLOGISCHEN BUNDESANSTALT Jb. Geol. B.-A. ISSN 0016–7800 Band 158 Heft 1–4 S. 29–47 Wien, Dezember 2018 Review of the Devonian/Carboniferous boundary in the Carnic Alps HANS P. SCHÖNLAUB* 16 Text-Figures Österreichische Karte 1:50.000 Italy BMN / UTM Carnic Alps 197 Kötschach / NL 33-04-09 Oberdrauburg Devonian 197 Kötschach / NL 33-04-10 Kötschach-Mauthen Carboniferous Conodonts Hangenberg Crisis Contents Abstract ................................................................................................ 29 Zusammenfassung ........................................................................................ 30 Current knowledge ........................................................................................ 30 Review of sedimentary and tectonic history ..................................................................... 32 Important stratigraphic markers .............................................................................. 32 Middle and Upper Ordovician ............................................................................. 32 Silurian .............................................................................................. 32 Devonian............................................................................................
    [Show full text]
  • Some Remarks on the Ontogenetic Development and Sexual Dimorphism in the Ammonoidea
    KOMITET GEOLOGICZNY POLSKIEJ AKADEMIINAUK acta geologica PANSTWOWE WVDAWNICTWONAUKOWE • WARSZAWA polonica Vol. 21, No. 3 Warszawa 1971 HENRYlK MAiKOIWSiKJI Some remarks on the ontogenetic development and sexual dimorphism in the Ammonoidea ABSmAC"r: The WIiiter dliscusses :the problem, suggested by some authors, of Intel'pl'etartnon 0If ISIIIlIa!ll f.oImne .in Ammwwidea .as neotenic ones. The c1asslica,1 con­ ception of neoteny as OOlIlJDJeCted 'WIith presence of a mval stage IWhlch 'in Ammono­ idea was' very tiny.1Dt therefore taP,pean;thaot &mall fOl'lIIls in Ammoooildea are highly advanced in !their ontoge!!letiJc devellOpment as' compared wdth a !larval stage of this group. lNumerow;. examples are also k'nOlWln of the d1morphism, ~he laxge and smal:l forms !in which differ in thed!1" dimen&iO!Il6 very inctistinctly. The laJliter facts oontradkt a COIlC'elPtion of a !I1eI()il;e.nIic character of small furIrns. The rwrlter discusses also the· problem of sys'teir:nlaitics of the Aml!Ilonoidea aga:iJru;t the ba,c!kground of >the OOIlIlIIl'ol1'lly IbeiJng a'ccepted ifueoa:y 'of sexual dimlQll",ph:iJsm. INTIBOIDUCTJIOIN Several pap,ers and opinions on sexual dimorphism in the Ammono­ idea have recently appeared in literature. The problems of systematics related to this phenomenon are dealt with by the authors who also dis­ cuss various concrete examples of dimorphism or certain biological inter­ pretations of the essenCe of this phenomenon. The present writer's inten­ tion is to contribute some of his remarks concerning these problems. 'HENRYK MAKOWSKI" SOIME OIF THE BIOlLOGlIICAL <IN'I1ERlPIRETATIOlNlS CIF SlEXitYAL DIMORIPHillSiMLN THE AiMlMONiOJIDEA Both within the framework of the theory of sexual dimorphism and.
    [Show full text]
  • Paleontological Contributions
    THE UNIVERSITY OF KANSAS PALEONTOLOGICAL CONTRIBUTIONS May 15, 1970 Paper 47 SIGNIFICANCE OF SUTURES IN PHYLOGENY OF AMMONOIDEA JURGEN KULLMANN AND JOST WIEDMANN Universinit Tubingen, Germany ABSTRACT Because of their complex structure ammonoid sutures offer best possibilities for the recognition of homologies. Sutures comprise a set of individual elements, which may be changed during the course of ontogeny and phylogeny as a result of heterotopy, hetero- morphy, and heterochrony. By means of a morphogenetic symbol terminology, sutural formulas may be established which show the composition of adult sutures as well as their ontogenetic development. WEDEKIND ' S terminology system is preferred because it is the oldest and morphogenetically the most consequent, whereas RUZHENTSEV ' S system seems to be inadequate because of its usage of different symbols for homologous elements. WEDEKIND ' S system includes only five symbols: E (for external lobe), L (for lateral lobe), I (for internal lobe), A (for adventitious lobe), U (for umbilical lobe). Investigations on ontogenetic development show that all taxonomic groups of the entire superorder Ammonoidea can be compared one with another by means of their sutural development, expressed by their sutural formulas. Most of the higher and many of the lower taxa can be solely characterized and arranged in phylogenetic relationship by use of their sutural formulas. INTRODUCTION Today very few ammonoid workers doubt the (e.g., conch shape, sculpture, growth lines) rep- importance of sutures as indication of ammonoid resent less complicated structures; therefore, phylogeny. The considerable advances in our numerous homeomorphs restrict the usefulness of knowledge of ammonoid evolution during recent these features for phylogenetic investigations.
    [Show full text]
  • Back Matter (PDF)
    Index Page numbers in italic denote Figures. Page numbers in bold denote Tables. Acadian Orogeny 224 Ancyrodelloides delta biozone 15 Acanthopyge Limestone 126, 128 Ancyrodelloides transitans biozone 15, 17,19 Acastella 52, 68, 69, 70 Ancyrodelloides trigonicus biozone 15, 17,19 Acastoides 52, 54 Ancyrospora 31, 32,37 Acinosporites lindlarensis 27, 30, 32, 35, 147 Anetoceras 82 Acrimeroceras 302, 313 ?Aneurospora 33 acritarchs Aneurospora minuta 148 Appalachian Basin 143, 145, 146, 147, 148–149 Angochitina 32, 36, 141, 142, 146, 147 extinction 395 annulata Events 1, 2, 291–344 Falkand Islands 29, 30, 31, 32, 33, 34, 36, 37 comparison of conodonts 327–331 late Devonian–Mississippian 443 effects on fauna 292–293 Prague Basin 137 global recognition 294–299, 343 see also Umbellasphaeridium saharicum limestone beds 3, 246, 291–292, 301, 308, 309, Acrospirifer 46, 51, 52, 73, 82 311, 321 Acrospirifer eckfeldensis 58, 59, 81, 82 conodonts 329, 331 Acrospirifer primaevus 58, 63, 72, 74–77, 81, 82 Tafilalt fauna 59, 63, 72, 74, 76, 103 ammonoid succession 302–305, 310–311 Actinodesma 52 comparison of facies 319, 321, 323, 325, 327 Actinosporites 135 conodont zonation 299–302, 310–311, 320 Acuticryphops 253, 254, 255, 256, 257, 264 Anoplia theorassensis 86 Acutimitoceras 369, 392 anoxia 2, 3–4, 171, 191–192, 191 Acutimitoceras (Stockumites) 357, 359, 366, 367, 368, Hangenberg Crisis 391, 392, 394, 401–402, 369, 372, 413 414–417, 456 agnathans 65, 71, 72, 273–286 and carbon cycle 410–413 Ahbach Formation 172 Kellwasser Events 237–239, 243, 245, 252
    [Show full text]
  • Early Permian Ammonoids from the Takakurayama Area, Abukuma Mountains, Northeast Japan Masayuki FUJIKAWA* and Chisato SUZUKI**
    Sci. Rep., Niigata Univ. (Geology), No. 26, 61-72, 2011 61 Early Permian ammonoids from the Takakurayama area, Abukuma Mountains, northeast Japan Masayuki FUJIKAWA* and Chisato SUZUKI** Abstract Four ammonoid species, Thalassoceras? sp., Artinskia sp., Agathiceras sp., and Paragastrioceras? sp., are described from the lower part of the Takakurayama Formation in the Takakurayama area, Abukuma Mountains, northeast Japan. This fauna indicates an Early Permian (Sakmarian-Artinskian) age. Three of these species except for Agathiceras sp. are described from the Takakurayama Formation for the first time. Key words: Abukuma Mountains, ammonoid, Early Permian, Takakurayama. Introduction The Permian Takakurayama Formation (Onuki, 1966) is widely distributed in the Takakurayama area, Abukuma Mountains, South Kitakami Belt, northeast Japan (Fig. 1). The formation is exposed on the northeastern slope of Mt. Takakurayama, where it generally strikes NNE-SSW and dips at 30-45º to the west. It consists mainly of black shale with subordinate sandstone and conglomerate, and is more than 805 m in total thickness (Fig. 2). The formation is subdivided into three members: the Iriishikura, Motomura, and Kashiwadaira members, in ascending order (Onuki, 1966). These members are equivalent to the Iriishikura, Motomura, and Kashiwadaira formations proposed by Yanagisawa and Nemoto (1961). Here, we adopt Onuki’s scheme, and refer to the lower part of the Takakurayama beds as the Iriishikura Member. This paper describes ammonoid specimens * Akiyoshi-dai Museum of Natural History, Mine, Yamaguchi 754-0511, Japan ** Yotsukura-machi, Aza Nishi 2-6-3, Iwaki, Fukushima 979-0201, Japan (Manuscript received 13 December, 2010; accepted 22 February, 2011) 62 M. Fujikawa and C.
    [Show full text]
  • Devonian to Lower Carboniferous Stratigraphy and Facies of the Moroccan Meseta: Implications for Palaeogeography and Structural Interpretation – a Project Outline
    Becker & El Hassani A project outline Devonian to Lower Carboniferous stratigraphy and facies of the Moroccan Meseta: implications for palaeogeography and structural interpretation – a project outline R. Thomas BECKER & Ahmed EL HASSANI 1. Introduction al., Eds., 2013; HARTENFELS et al., Eds., 2018). The eastern Anti-Atlas is famous for its 1.1. Devonian stratigraphy internationally celebrated geological heritage The Devonian was the first system in which (e.g., EL HASSANI et al. 2017), but, as presented all chronostratigraphic units (series and stages) in this volume, there are equally important and were formally defined, producing a stable time fossil-rich localities in the Western Meseta and frame work for detailed international and Middle Atlas basement. interdisciplinary correlation (e.g., BECKER et al. 2012, 2020). This also applies to the main 1.2. Devonian plate tectonics part (Tournaisian, Viséan) of the Lower The Devonian plate tectonic configuration Carboniferous (e.g., DAVYDOV et al. 2012). has been controversial for a long time and this The most significant fossil groups that provide applies especially to the latitudinal position of an international high-resolution subdivision of Gondwana and Laurussia (= Laurentia + time are conodonts and ammonoids for the Baltica + Avalonia) and to the width of the pelagic facies realm, conodonts, brachiopods oceanic system between both supercontinents, and trilobites for the neritic realm, and variably named as western part of the miospores for terrestrial settings and for Prototethys, Palaeotethys, or the Variscan nearshore clastic sediments with high Oceans (FRANKE et al. 2017). The widely used terrigeneous influx. There are both regional term Rheic Ocean applies only to a specific and global zonation schemes, which part within the dynamic system; it closed supplement each other.
    [Show full text]
  • Sepkoski, J.J. 1992. Compendium of Fossil Marine Animal Families
    MILWAUKEE PUBLIC MUSEUM Contributions . In BIOLOGY and GEOLOGY Number 83 March 1,1992 A Compendium of Fossil Marine Animal Families 2nd edition J. John Sepkoski, Jr. MILWAUKEE PUBLIC MUSEUM Contributions . In BIOLOGY and GEOLOGY Number 83 March 1,1992 A Compendium of Fossil Marine Animal Families 2nd edition J. John Sepkoski, Jr. Department of the Geophysical Sciences University of Chicago Chicago, Illinois 60637 Milwaukee Public Museum Contributions in Biology and Geology Rodney Watkins, Editor (Reviewer for this paper was P.M. Sheehan) This publication is priced at $25.00 and may be obtained by writing to the Museum Gift Shop, Milwaukee Public Museum, 800 West Wells Street, Milwaukee, WI 53233. Orders must also include $3.00 for shipping and handling ($4.00 for foreign destinations) and must be accompanied by money order or check drawn on U.S. bank. Money orders or checks should be made payable to the Milwaukee Public Museum. Wisconsin residents please add 5% sales tax. In addition, a diskette in ASCII format (DOS) containing the data in this publication is priced at $25.00. Diskettes should be ordered from the Geology Section, Milwaukee Public Museum, 800 West Wells Street, Milwaukee, WI 53233. Specify 3Y. inch or 5Y. inch diskette size when ordering. Checks or money orders for diskettes should be made payable to "GeologySection, Milwaukee Public Museum," and fees for shipping and handling included as stated above. Profits support the research effort of the GeologySection. ISBN 0-89326-168-8 ©1992Milwaukee Public Museum Sponsored by Milwaukee County Contents Abstract ....... 1 Introduction.. ... 2 Stratigraphic codes. 8 The Compendium 14 Actinopoda.
    [Show full text]
  • Abstracts and Program. – 9Th International Symposium Cephalopods ‒ Present and Past in Combination with the 5Th
    See discussions, stats, and author profiles for this publication at: https://www.researchgate.net/publication/265856753 Abstracts and program. – 9th International Symposium Cephalopods ‒ Present and Past in combination with the 5th... Conference Paper · September 2014 CITATIONS READS 0 319 2 authors: Christian Klug Dirk Fuchs University of Zurich 79 PUBLICATIONS 833 CITATIONS 186 PUBLICATIONS 2,148 CITATIONS SEE PROFILE SEE PROFILE Some of the authors of this publication are also working on these related projects: Exceptionally preserved fossil coleoids View project Paleontological and Ecological Changes during the Devonian and Carboniferous in the Anti-Atlas of Morocco View project All content following this page was uploaded by Christian Klug on 22 September 2014. The user has requested enhancement of the downloaded file. in combination with the 5th International Symposium Coleoid Cephalopods through Time Abstracts and program Edited by Christian Klug (Zürich) & Dirk Fuchs (Sapporo) Paläontologisches Institut und Museum, Universität Zürich Cephalopods ‒ Present and Past 9 & Coleoids through Time 5 Zürich 2014 ____________________________________________________________________________ 2 Cephalopods ‒ Present and Past 9 & Coleoids through Time 5 Zürich 2014 ____________________________________________________________________________ 9th International Symposium Cephalopods ‒ Present and Past in combination with the 5th International Symposium Coleoid Cephalopods through Time Edited by Christian Klug (Zürich) & Dirk Fuchs (Sapporo) Paläontologisches Institut und Museum Universität Zürich, September 2014 3 Cephalopods ‒ Present and Past 9 & Coleoids through Time 5 Zürich 2014 ____________________________________________________________________________ Scientific Committee Prof. Dr. Hugo Bucher (Zürich, Switzerland) Dr. Larisa Doguzhaeva (Moscow, Russia) Dr. Dirk Fuchs (Hokkaido University, Japan) Dr. Christian Klug (Zürich, Switzerland) Dr. Dieter Korn (Berlin, Germany) Dr. Neil Landman (New York, USA) Prof. Pascal Neige (Dijon, France) Dr.
    [Show full text]