DOCSLIB.ORG

Bathonian-Callovian Eurycephalitinae

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Bathonian-Callovian Eurycephalitinae See discussions, stats, and author profiles for this publication at: https://www.researchgate.net/publication/37988440 New Jurassic Ammonitina from New Zealand: Bathonian-Callovian Eurycephalitinae Article in New Zealand Journal of Geology and Geophysics · December 2002 DOI: 10.1080/00288306.2002.9514988 · Source: OAI CITATIONS READS 15 59 3 authors, including: Neville Hudson University of Auckland 11 PUBLICATIONS 113 CITATIONS SEE PROFILE All in-text references underlined in blue are linked to publications on ResearchGate, Available from: Neville Hudson letting you access and read them immediately. Retrieved on: 05 October 2016 NewWestermann Zealand et Journal al.—Eurycephalitinae of Geology & Geophysics, from New Zealand2002, Vol. 45: 499–525 499 0028–8306/02/4504–0499 $7.00/0 © The Royal Society of New Zealand 2002 New Jurassic Ammonitina from New Zealand: Bathonian–Callovian Eurycephalitinae GERD E. G. WESTERMANN Zealand occurrence is much earlier than in Indonesia (Middle School of Geography & Geology Oxfordian). Furthermore, first occurrence is diachronous McMaster University according to ammonite biostratigraphy even in Auckland Hamilton, Ontario L8S 4M1, Canada Province, that is, between Faunas 3 and 4 in Awakino valley and in Fauna 2 at Kawhia Harbour. Regional and local facies NEVILLE HUDSON control is indicated. On the other hand, Fauna 2 includes R. stehni Damborenea known from the Early/earliest JACK GRANT-MACKIE Callovian of the Andes. Department of Geology University of Auckland Keywords Ammonitina; Sphaeroceratidae; Jurassic; Private Bag 92019 Eurycephalitinae; new taxa; Bathonian; Callovian; Auckland, New Zealand Oxfordian; Kimmeridgian; New Zealand; Kawhia Harbour; Awakino valley; Andean Bioprovince; chronostratigraphy Abstract Several new ammonite assemblages are described from the uppermost Temaikan and basal Heterian INTRODUCTION regional stages of New Zealand, Auckland Province, consisting mainly of the east Pacific Eurycephalitinae A general introduction to the Jurassic geology of New (Family Sphaeroceratidae). Four successive faunas are Zealand was given by Westermann et al. (2000), which distinguished in the upper Awakino valley: all include the treated the Bajocian Ammonitina. This paper is concerned Andean genus Araucanites, here occurring with both sex- with the next-higher ammonite faunas that are known only morphs. Fauna 1 includes Araucanites awakino n. sp., from Auckland Province in the North Island. Iniskinites cf. crassus Riccardi & Westermann, and While this work on the Middle Jurassic Ammonitina was Xenocephalites grantmackiei Westermann & Hudson m/m in progress for the last several years, G. R. Stevens has ¥ Lilloettia aff. steinmanni (Spath) f/M—latest Bathonian; thoroughly revised the Upper Jurassic Ammonoidea of New Fauna 2 includes Araucanites postawakino n. sp. and Zealand (Stevens 1997). Due to the persistent uncertainty Xenocephalites cf. stipanicici Riccardi et al.—Early/earliest in the correlation of New Zealand regional stages and Callovian; Fauna 3 with Araucanites ponganui n. sp., uncorrected taxonomic errors of the past, however, Stevens’ Iniskinites gr. cepoides (Whiteaves), and Choffatia gr. furcula and our works include some of the same taxa from the Oraka (Neumayr)—Early Callovian; Fauna 4 with Araucanites Sandstone of the Kawhia Harbour section. The genera spellmani n. sp.—? Middle Callovian. Epicephalites and Subneumayria, poorly known The Oraka Sandstone at Kawhia Harbour is now placed Kimmeridgian perisphinctaceans from Mexico, were entirely in the uppermost Bathonian and Lower Callovian identified from isolated fragments almost half a century ago (i.e., with Faunas 1 and 2). Ammonites previously identified by W. J. Arkell (1956; in Fleming & Kear 1960), and these with Kimmeridgian taxa—that is, “Epimayaites”, identifications and age have been retained by Stevens (1997). “Epicephalites”, and “Subneumayria”—are now classified By contrast, we place these poorly preserved New Zealand as microconchs of Araucanites and with macroconchs of forms, including E. marwicki Stevens, in the genera Lilloettia and Iniskinites. The superjacent Ohineruru Araucanites and Lilloettia of the east Pacific sphaeroceratid Formation contains a typically Indo-Pacific fauna of Late subfamily Eurycephalitinae. Furthermore, the Oxfordian Oxfordian to Early Kimmeridgian age, based on Sulaites genus Epimayaites formerly identified from the Oraka heteriensis (Stevens) [ex Idoceras], a close relative of Sandstone (Hudson et al. 1987; Sukamto & Westermann S. gerthi Oloriz & Westermann from New Guinea, and, 1992; Westermann 1994), characteristic for the Himalayan above, Paraboliceras macnaughti (Stevens) [ex Kossmatia]. faunal province, and recognised as a eurycephalitine The interval Upper Callovian to Middle Oxfordian microconch by Westermann (1996a, b), is now placed in cannot be documented by ammonites in New Zealand, Araucanites awakino n. sp. New Zealand Eurycephalitinae suggesting a hiatus between Oraka and Ohineruru can be compared to latest Bathonian to basal Oxfordian taxa Formations, marked by the Captain King’s Shellbed. of the Andes but probably ranged no higher than the Middle Other useful index fossils are forms of the bivalve Callovian. The only ammonite indicating Oxfordian is the Retroceramus. The first occurrence of R. galoi (Boehm) Late Oxfordian to Early Kimmeridgian genus Sulaites Oloriz defines the base of the Heterian regional stage, but its New & Westermann (1998) formerly known from the Himalayan Province. S. heteriensis (Stevens) resembles the (?)Early Kimmeridgian S. gerthi Oloriz & West. from New Guinea. Significantly, this form was formerly also compared with G02002; published 6 December 2002 Kimmeridgian Idoceras of Mexico (Arkell 1956; and in Received 7 January 2002; accepted 9 September 2002 Fleming & Kear 1960; Stevens 1997). 500 New Zealand Journal of Geology and Geophysics, 2002, Vol. 45 The late Middle Jurassic ammonites of the sphaeroceratid 2. Totara peninsula, Kawhia Harbour (Fig. 1A, E) Subfamily Eurycephalitinae Thierry have been thoroughly The sequence exposed on the east coast of the Totara revised, taxonomically and stratigraphically, by Riccardi & peninsula has long been known for its rich invertebrate Westermann (1991). The recent finds and/or identifications faunas (Trechmann 1923) including ammonites. Fleming & of eurycephalitines in New Zealand (Westermann & Hudson Kear (1960) erected three formations for marine strata 1991; Westermann 1996a, b) have greatly extended our immediately above their Wharetanu Measures: Oraka knowledge of their biogeographic global distribution, from Sandstone, Captain King’s Shellbed, and Ohineruru the eastern Pacific into the southwestern Pacific. Explor- Formation. The Oraka Sandstone is 80 m thick in this section ations in the Himalaya of Nepal by Cariou et al. (1994) and and has yielded a rich fauna of eurycephalitine ammonites. the Andes of northern Chile by Hillebrandt & Gröschke Francis (1977) recorded a single “Epicephalites cf. (1995) have significantly enhanced our knowledge of epigonus” from the Captain King’s Shellbed (R15/f8027). eurycephalitine phylogeny and chronology (Westermann Eurycephalitine ammonites are unknown from the overlying 1996c). In particular, the time-correlation of the Xeno- Ohineruru Formation. Much of the pre-1960 material from cephalites grantmackiei-Lilloettia assemblage from the this section is poorly localised and, although much of it can Upper Temaikan Stage of Auckland Province (here called be placed in the correct formation based on lithology and/or Fauna 1), can now more firmly be dated as latest Bathonian detailed locality information, the exact horizon within these Discus Chronozone. The Araucanites faunas newly units is unknown. All of the pre-1981 collections from the described here form successive associations above. type section of the Oraka Sandstone were assigned to a single This New Zealand ammonoid fauna, however, is fossil locality (R15/f8550). The collections made from this extremely low in diversity. Associated with the Eury- section since 1981, with finer stratigraphic control, are as cephalitinae are chronostratigraphically insignificant follows: phylloceratids, sometimes dominant, and some lytoceratids, as well as rare perisphinctids. The benthic invertebrate fauna, R15/f47 0–0.15 R15/f215 25.45–26.6 on the other hand, is moderately diverse, but only the R15/f52* 0.15–8.0 R15/f216* 26.6 –28.05 retroceramid bivalves so far have any value for inter-regional R15/f211 8–14 R15/f217* 28.05–30.15 correlation (Damborenea 1990, 1993; Damborenea et al. R15/f51 9 R15/f218 30.15–33.25 1992). R15/f212 14–20 R15/f219* 33.25–37.25 R15/f213 20–23 R15/f268 60 R15/f214 23.0–25.45 R15/f350 3–5 m below top FOSSIL LOCALITIES, STRATIGRAPHY, (Heights above the base of the Oraka Sandstone in metres; MACROFAUNA *locality yielding ammonites cited in text.) All ammonites described in this paper were collected from To date, in this section the lowest known occurrence sandstones and mudstones of the Rengarenga and Kirikiri of Retroceramus galoi, and therefore the base of the Groups (Fleming & Kear 1960) outcropping in the Kawhia Heterian Stage, is at R15/f213 (Helby et al. 1988). Regional Syncline (Suggate in Suggate et al. 1978) of However, in January 2000, two poorly preserved speci- Southwest Auckland Province, North Island, New Zealand mens identified only as R. ex gr. galoi were collected from (Fig. 1, 2). The strata concerned range in age from Late the upper half of R15/f52. These suggest
Load more

Recommended publications
  • Callovian(Middle Jurassic)Ammonite Faunas of the Northwest Iberian Ranges: B Iostratigraphy and Palaeobiogeography
    Batizonjan - Callovian(Middle Jurassic)ammonite faunas of the Northwest Iberian Ranges: b iostratigraphy and palaeobiogeography J. THIERR’? and 5. WILDE** 0 157 «Géodynamique sédimentaire et Evolution géobiologique» * URA ~ii7NRSn eL Centre des Sejences de la Terre, Université de Boargogne, 6 Rd Gabrial 21100 DIJON (France) ** Jns¿ñrnJí¿r Gealogie, Ruhr-Universitñ¿ D-4630 BOCHUM, (RE4) XBSTRACT Thc Bathonian-Callovian carbonated sedimenis, sometimes sandy or silty and ctayish, of the Iberian ptatform in Ihe Sierras de la Demanda, Cameros ami Moncayo near Burgos, Logroño, Soria ami Zaragoza (North- west Iberian Ranges) yeld significant ammonite faunas for a precise bios- tratigraphic approach; these also allow sorne biogeographic remarks about Ihis region situated in platform environrnents almost off on the North Tethyan margin. During the Bathonian (Montenegro, Soria, Olvega and Ricla forma- tions) the faunas are dominated by the Perisphinctidae (Procerites, Siemi- radkia, Wagnericeraá; h’omeop/anulñes. Ch~ffatia —70 %)4 the other taxa are sorne Oppelidae (Oxycerites, Qecotraustes Prohecticoceras —20 %). Parkinso- niidae (Gonolkites bipistrenoceras —5 %) and Tulitidae íBullatimorphites —5 %). The various recognized species allow to conclude that the Lower Bathonian (Zigzag zone; Convergens and Yeovilensis subzones) is repre- sented as weIl as the Middle Bathonian (Progracilis and Subeontractus zones; Subeontractus and Morrisi subzones) and the Upper Bathonian (Retrocostaturn zone and subzone). It must be noted that Morphoceratidae of Lowermost Baihonian and Clydoniceratidae of Upperrnost Bathonian are missing. In Callovian, (Montenegro, Pozalmuro and Ricla formations) only Ihe lower pad of Ihis stage is dcli in ammonites. The Macroceplialus and Gracilis zones are weII distinguished witb prevalent Macrocephalitidae (Macrocephalites —45 %) and Perisphinctidae (Choifatia, Homeoplanulites, Indosphinctes, Grossouvria —40 %).
    [Show full text]
  • On the Occurrence of the Indonesian Ammonite Macrocephalites
    3 Zitteliana 93 On the occurrence of the Indonesian ammonite Macrocephalites keeuwensis Boehm [M & m] from Kachchh (Western India) Paläontologie Bayerische GeoBio- & Geobiologie Staatssammlung Center LMU München für Paläontologie und Geologie LMU München Sreepat Jain* n München, 2019 Department of Applied Geology, School of Applied Natural Sciences, Adama Science and n Manuscript received 10.10.2017; revision Technology University, P.O. Box 1888, Adama, Ethiopia accepted 12.02.2018; available online: 13.12.2018 *E-mail: [email protected] n ISSN 0373-9627 n ISBN 978-3-946705-05-5 Zitteliana 93, 3–24. Abstract The dimorphic occurrence of the Indonesian ammonite Macrocephalites keeuwensis Boehm is reported co-occurring with the Late Bathonian Macrocephalites cf. mantataranus Boehm [M] from the basal sediments (ash gray marl-limestone intercalations) of the Jara Dome (Kachchh, Western India). Coeval sediments from the adjoining Jumara Dome also record M. cf. mantataranus Boehm [M] and M. keeuwensis var. aff. forma flexuosa Boehm [m]. Based on these finds, the age of the IndonesianM . keeuwensis Association is re-evalua- ted as also the age of the nominal species that now occurs in Kachchh, Madagascar and Europe. A new Late Bathonian age is proposed for the Association that hitherto was assigned on balance to straddle between “late Early Callovian–latest Bathonian”. It is speculated that M. keeuwensis Boehm [M & m] gave rise to two distinct lineages and the paper documents the separation of these two different lines. One that gave rise to the Early Callovian M. lamellosus (Sowerby), and which in turn to the late Early Callovian Subkossmatia opis Spath.
    [Show full text]
  • Callovian (Jurassic) Ammonites from the United States and Alaska
    Callovian (Jurassic) Ammonites from the United States and Alaska Part 1. Western Interior United States GEOLOGICAL SURVEY PROFESSIONAL PAPER 249-A Callovian (Jurassic) Ammonites from the United States and Alaska Part 1. Western Interior United States By RALPH W. IMLAY GEOLOGICAL SURVEY PROFESSIONAL PAPER 249-A Descriptions and illustrations of cephalopods of Late Jurassic age UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON : 1953 UNITED STATES DEPARTMENT OF THE INTERIOR Oscar L. Chapman, Secretary GEOLOGICAL SURVEY W. E. Wrather, Director For sale by the Superintendent of Documents, U. S. Government Printing Office Washington 25, D. C. CONTENTS Page Page Abstract -—--—---—-——————_—————__________.._____.„__.______ 1 Ecologic considerations—Continued Introduction --——————————————.._____________._„._.„___ 1 Conditions of deposition—— _.____.__———-——.——— 9 Biologic analysis ——————.——__——._____.___.._____„_„_____ 1 Conglomerate —...— ——————————_.., 9 Stratigraphic summary ———————._.__——____.____________ 4 Sand ——_———————————————— — 9 Faunal zones and correlations————..__————_.._——— 5 Marine siltstone and shale.—————-—_——— 10 Arcticoceras codyense zone..————.._______....——_„ 5 Limestone -——————_.-_————————.——— 10 Gowericeras costidensum zone____—._...„——_.——_——— 7 Other types of sediment———————————— 10 Gowericeras subitum zone————_-.........._..._„„........ 7 Ammonite distribution and associations—————— 11 Kepplerites tychonis zone.__————————_———. 7 Geographic distribution - - ———————————————— 14 Kepplerites mcleami zone.—————„___„..—.............. 7 Summary of results--------———————————————— 17 Comparisons with other faunas————____........„—....„.. 8 Systematic descriptions ———.—_.————————— 18 Ecologic considerations —————————_——.__..._.... 8 References ———————————————————— ———. 34 Sources of sediment———_——.._ _„__..—_———._.. 8 Index -.-—————————.———————-—-—--——— 37 ILLUSTRATIONS [Plates 1-24 follow index] PLATE 1. Xenocephalites and Lilloettia 2-4. Arcticoceras 5. Cosmoceras and Arcticoceras 6,7. Cadoceras 8, 9.
    [Show full text]
  • Lower and Middle Jurassic Ammonoids of the Shemshak Group in Alborz, Iran and Their Palaeobiogeographical and Biostratigraphical Importance
    Lower and Middle Jurassic ammonoids of the Shemshak Group in Alborz, Iran and their palaeobiogeographical and biostratigraphical importance KAZEM SEYED−EMAMI, FRANZ T. FÜRSICH, MARKUS WILMSEN, MAHMOUD R. MAJIDIFARD, and ALI SHEKARIFARD Seyed−Emami, K., Fürsich, F.T., Wilmsen, M., Majidifard, M.R., and Shekarifard, A. 2008. Lower and Middle Jurassic ammonoids of the Shemshak Group in Alborz, Iran and their palaeobiogeographical and biostratigraphical importance. Acta Palaeontologica Polonica 53 (2): 237–260. The Shemshak Group at Shahmirzad (northern Iran) is characterized by the most frequent and extensive marine intercala− tions and contains the most abundant and diverse ammonite faunas hitherto known from the Lower and lower Middle Ju− rassic strata of the Alborz Range. So far, 62 ammonite taxa have been recorded from this area, including 25 taxa from ear− lier studies. The taxa belong to the families Cymbitidae, Echioceratidae, Amaltheidae, Dactylioceratidae, Hildoceratidae, Graphoceratidae, Hammatoceratidae, Erycitidae, and Stephanoceratidae with the new species Paradumortieria elmii and Pleydellia (P.?) ruttneri. The fauna represents the Late Sinemurian, Late Pliensbachian, Toarcian, Aalenian, and Early Bajocian. Palaeobiogeographically, it is closely related to the Northwest European (Subboreal) Province, and exhibits only minor relations with the Mediterranean (Tethyan) Province. Key words: Ammonitida, biostratigraphy, palaeobiogeography, Jurassic, Shemshak Group, Alborz Mountains, Iran. Kazem Seyed−Emami [[email protected]] and Ali Shekarifard, School of Mining Engineering, University College of En− gineering. University of Tehran, P.O. Box 11365−4563, Tehran, Iran; Franz T. Fürsich [[email protected]−erlangen.de] and Markus Wilmsen [[email protected]−erlangen.de], Geozentrum Nordbayern der Universität Erlangen−Nürnberg, Fachgruppe PaläoUmwelt, Loewenichstraße 28, D−91054 Erlangen, Germany; Mahmoud R.
    [Show full text]
  • Publikationen Mit Beteiligung Von Mitgliedern Der SKJ Im Druck
    Publikationen mit Beteiligung von Mitgliedern der SKJ im Druck Audo, D., Schweigert, G. & Charbonnier, S. (im Druck): Proeryon, the most widespread and long‐lived genus of Polychelidan lobsters. – Annales de Paléontologie Kutz, M., Dietze, V. & Franz, M. (im Druck): Neue Ammonitenfunde aus der Hauptrogenstein‐ Formation (Mittlerer Jura) vom Tuniberg (Oberrheingraben, SW‐Deutschland). – Jahresberichte und Mitteilungen des oberrheinischen geologischen Vereins Dietze, V. & Schweigert, G. (im Druck): Zwei exotische Ammoniten aus dem Ober‐Aalenium (Mittlerer Jura) von Blumberg‐Achdorf (SW‐Deutschland). – Jahreshefte der Gesellschaft für Naturkunde in Württemberg. Dietze, V., Wannenmacher, N. & Schweigert, G. (im Druck): Die Sauzei‐Zone (Mitteljura, Unter‐Bajocium) im Gebiet des Hohenzollern (Schwäbische Alb, SW‐Deutschland). – Zitteliana Schweigert, G., Scherzinger, A. & Lehmkuhl, A. (2020): Eine „verlorene Formation“ – die jüngsten Weißjura‐Relikte der Schwäbischen Alb. – Jahresberichte und Mitteilungen des oberrheinischen geologischen Vereins 2019 Audo, D. & Schweigert, G. (2019): Das Meereskrokodil Pelagosaurus – Kronjuwel einer Fossiliensammlung. – Fossilien, 36 (1): 4‐7. Dietl, G. (2019): Die Ammonitenfauna der Medea‐Subzone (untere Jason‐Zone, Mittel‐ Callovium) aus dem Ornatenton, mittlere Schwäbische Alb, SW‐Deutschland. – Jh. Ges. Naturkde. Württemberg, 175: 129‐148. Dietl, G. & Niederhöfer, H.‐J. (2019): Ein weiterer Beleg für die Medea‐Subzone (untere Jason‐ Zone, Mittel‐Callovium), und zwar aus dem Wartenbergoolith von Geisingen a. d. Donau, ‐ Jh. Ges. Naturkde. Württemberg, 175: 149‐ 158. Dietze, V. & Wannenmacher, N. (2019): Eine Emileia von der Zollernalb – vom Fund zum wissenschaftlichen Beleg. ‐ Fossilien, 36(1): 44–47. Dietze, V. & Hillebrandt, A. (2019): Lower Bajocian (Middle Jurassic) Ammonites of the Manflas area in Atacama Province, Northern Chile, Part 2: Giebeli Zone. ‐ Zitteliana, 93: 25– 46; München.
    [Show full text]
  • On a New Species of Macrocephalites Zittel from Jurassic of Kachchh * (Gujarat)
    Journal Geological Society of Jodia. Vol. 23. Dec. 1982. PP. 621 to 623 On a new species of Macrocephalites Zittel from Jurassic of Kachchh * (Gujarat) D. K. PANDEY AND C. S. P. SINGH Departmcnt of Geology, Banaras Hindu University, Varana~i 221 005 Abstract A new spccies of Macrocephalites Zittel viz. Macroceplialiles (Macroccplltlliles) inflata, has been proposed, described and illustrated from the materials of Jurassic of Pachchham* Island in the district of Kachchh*. rnt roduction Macrocephalites s. s., an ammonoid subgenus, was hitherto known from Kachchh by four species only, viz. M. (M.) formosus (J. de C. Sowerby), M. (AI.) chariensis (Waagen), M. (M.) madagascariensis Lemoine and M. (M.) triangularis Spath. Recently. several specimens of Microcephalites have been collected from east of the village of Khavda (23 C 50'30"N and 69=44'E). Pachchham* Island, by the present authors. The specimen described here (M. (M.) inftata n. sp.) is very well preserved and does not match with any of the four taxa mentioned abovc. Repository: The described specimen is lodged in the Department of Geology, Banaras Hindu University, Varanasi 221005. Systematic Description Superfamily: STEPHANOCERATACEAE Neumayr, 1875 Family: MACROCEPHALITIDAE Buckman, 1922 Genus: Macrocephalites Zittel, 1884 Type species: Ammonites macrocephalus Schlotheim. I g I J (as interpreted by Zittel, 1884; ICZN Pend.) Subgenus: Macrocephalites 5.S. Macrocephalites (Macrocephalites) injlata n. sp. PI. J, figs. lao b, c. Material: A single specimen. 1/0ri::,011 and Locality: Lower Callovian (Bed No. 26) - East of Khavda, Pachchham Island, Kachchh. Diagnosis: Shell involute. strongly inflated, whorl section semicircular, flank irregularly ribbed with smooth umbilical regie-no Description: Shell involute, depressed with semicircular whorl section, and strongly inflated, maximum inflation being at about dorsal quarter of the sides.
    [Show full text]
  • The Arkelli Chronozone: a New Early Middle Bathonian Standard Ammonite Zone for Kachchh, Western India (Southern Jurassic Tethys)
    Zitteliana A 54 (2014) 91 The Arkelli Chronozone: A new early Middle Bathonian standard ammonite zone for Kachchh, western India (southern Jurassic Tethys) Sreepat Jain Zitteliana A 54, 91 – 135 München, 31.12.2014 DG-2, Flat 52D, SFS Flats, Vikaspuri, New Delhi – 110018, India E-mail: [email protected] Manuscript received 16.06.2014; revision accepted 28.07.2014 ISSN 1612 - 412X Abstract Based on the widespread distribution of the nominal and Madagascan ammonite species Procerites (Gracilisphinctes) progracilis arkelli Collignon [M] in Kachchh (western India), a new early Middle Bathonian Arkelli Chronozone is proposed and correlated with the Western European early Middle Bathonian Progracilis Zone. The nominal species is now firmly established as a geographic subspecies of the Western European P. (G.) progracilis Cox and Arkell [M]. The recorded assemblage within the Kachchh Mainland from this chrono- zone now contain Micromphalites (Clydomphalites) clydocromphalus Arkell [M], Procerites hians Waagen [M], Procerites (Siemiradzkia) cf. verciacensis [m], Sivajiceras congener (Waagen) [M and m], Procerites (Gracilisphinctes) progracilis arkelli Collignon [M and m], P. (G.) progracilis aff. arkelli Collignon [M], P. (G.) intermedius n. sp. [m], Macrocephalites cf. etheridgei Spath [m], M. bifurcatus transient aff. bifurcatus Boehm [m], M. bifurcatus transient intermedius (Spath) [M and m], M. bifurcatus transient cf. intermedius Boehm [M], Macroce- phalites triangularis Spath [M and m], Parapatoceras distans (Baugier and Sauzé) [M], Reineckeia sp. A and B [M] and Eutrephoceras sp. [M]. Coeval sediments at the Island Belt had previously yielded the presence of Procerites cf. schloenbachi, Micromphalites (Clydompha- lites) cf. clydocromphalus, M. (Clydomphalites) sp. indet., M. aff. hourcqui, Clydoniceras triangulare, C.
    [Show full text]
  • Bathonian–Callovian (Middle Jurassic) Ammonites from Northwestern
    Proceedings of the Geologists’ Association 127 (2016) 247–265 Contents lists available at ScienceDirect Proceedings of the Geologists’ Association jo urnal homepage: www.elsevier.com/locate/pgeola Bathonian–Callovian (Middle Jurassic) ammonites from northwestern Qiangtang Block, Tibet, and the revised age of the Suowa Formation Jiarun Yin * China University of Geosciences (Beijing), 29 Xueyuan Lu, Beijing 100083, PR China*Tel.: ++86 1084825070. A R T I C L E I N F O A B S T R A C T Article history: The age of the Suowa Formation, the latest Jurassic marine deposit in the Qiangtang Block, is important Received 22 August 2015 not only because of its great hydrocarbon potential, but also because it defines the termination of the Received in revised form 6 February 2016 Jurassic ocean in the area. New ammonite evidence from the upper part of the Suowa Formation in the Accepted 10 February 2016 northwestern Qiangtang region allows us to revise the age of the formation previously regarded as late Available online 19 March 2016 Jurassic due to the absence of time-diagnostic fossils. Newly collected ammonites include Gracili- sphinctes suprapanatinus (Arkell), Oxycerites orbis (Giebel), Macrocephalites (Macrocephalites) madagas- Keywords: cariensis Lemoine, Macrocephalites compressus (Quenstedt), Nothocephalites semilaevis (Waagen) [M], Qiangtang Block (northern Tibet) Nothocephalites asaphus Spath [m], Eucycloceras cf. cogginbrowni Spath, Choffatia (Subgrossouvria) Bathonian–Callovian Ammonite recuperoi (Gemmellaro) and Choffatia cf. sakutala Spath. Correlation with the biostratigraphical Biostratigraphy framework based on ammonites from Kachchh, western India, places the age of the Suowa Formation as Suowa Formation Middle Bathonian to Early Middle Callovian. An unconformity and depositional break between the Suowa Formation and the overlying Lower Cretaceous Xueshan Formation is proposed.
    [Show full text]
  • Brachiopoda and Reptilian Fossils from Jurassic of Kutch, Gujarat
    Rec. zool. Surv. India: 102 (Part 3-4) : 161-175,2004 ON SOME AMMONOIDEA, PELECYPODA (MOLLUSCA), BRACHIOPODA AND REPTILIAN FOSSILS FROM JURASSIC OF KUTCH, GUJARAT M. K. NAIK AND T. K. PAL Zoological Survey of India, M-Block, New Alipore, Kolkata-700 053 INTRODUCTION The Ammonoidea have been extinct long back but their shells in fossilized forms are seen in all the continental areas and many oceanic islands. Numbers of specimens are well preserved and their significance as a basis for lithostratigraphic interrelation has long been recognized by the palaeontologists. Hence, existing information on this group is sizeable one. The understanding about this group has eventually developed through the study of their shells and enclosing rock matrices, and occasionally of a few preserved opercula. The shells of ammonoids are comparable with those of extinct Nautilus, which are considered to be a close relative of the former. The nautiloids and ammonoids constitute the Subclass Terebranchiata. They were widespread in the past but are now represented by several species of the Genus Nautilus only. Most ammonoids had a relatively long centre of gravity. However, some forms with body chambers about a volution in length may have been able to invert themselves. The ancient Terebranchiates lived in the oceans and the seas over the globe and most of the known fossil forms have been recovered from the rocks, which represent shallow water marine deposits. In the Ordovician, they were an eminent group of animals. They continued to thrive in the Silurian, and in early Devonian the ammonoids evolved from the nautiloids. Throughout the Mesozoic period ammonoids were more abundant than the nautiloids.
    [Show full text]
  • ECLOGAE GEOLOGIOAE HELVETIAE Die Macrocephaliten Des
    ECLOGAE GEOLOGIOAE HELVETIAE Vol. 47, N° 2 — 1954 Die Macrocephaliten des Callovien von Herznach (Aargau) Von Alphonsp Jeannel (Zürich) Mit 50 Figuren und 1 Tabelle im Text und 15 Tafeln (XIII-XXVII) (Verfasst 1946 und 1953) Publiziert mit Unterstützung des Schweizerischen Nationalfonds zur Förderung der wissenschaftlichen Forschung. Inhaltsverzeichnis Vorwort Beschreibung der Arten (mit ausführlicher Liste) Beschriebene und abgebildete Macrocephaliten von Herznach Textfigurcn Gattungs- und Artnamen Seiten Quer- Tafel Figur Stufe selmitt- Sutur- figlU't'Il 1. Macrocephalites „ pauciplisses". Macrocephalites macrocephalus (v. SCHLOTH.) 229 - - XIV 4 5 A. 5 ,, verus S. BUCKM 230 1-2 3 4 XX 4 A. 5 Indocephalites sphaericus (GREIF) ROLLIER sp 232 5 6 XIII XIV 1 2 A. 5 XVII 5 B. 1 diadem/itus WAAGEN sp. 234 7,9 8, 10 XV XVI A. 5 platystomus ( ?) REIN. sp. 237 11 - XXII 5 A. 5 ,. (?) pila NIKITIN sp. 238 12 XX 5 A. 5 rotundus Qu. sp 239 13 14 XIV 3 A. 5 cf. chrysoolithicus WAAGEN sp 240 15 16 16 XVII 1 2 A. 5 B. 1 Pleurocephalites Krylowi MILACII. sp. 241 17 18 XVIII - A. 5 B. 1 ,. lophopleurus S. BUCKM. 242 19 - XVII 3 A. 5 ,, tumidus REIN, sp 243 20-21 22 XVII 4 A. 5 XIX A. 5 Uhligi LEMOINE sp. ... 246 23-24 25, 26 XXII 1-3 A. 5 Mund XXIII 4 A. 5 Kamptökephalites cf. Grantaniis OPPEL sp. 248 27 - - A. 5 ,, dimerus WAAGEN sp. 249 28 - XX 1 A. 5 Herveyi Sow. sp 250 29-30 31 XX 2 A. 5 Mund intermedius (GREIF) ROLLIER sp 251 32.
    [Show full text]
  • Morphological Characters, Systematic Position and Age of Fossil Genera Pertaining to Cephalopods
    EXPERIMENT 3 MORPHOLOGICAL CHARACTERS, SYSTEMATIC POSITION AND AGE OF FOSSIL GENERA PERTAINING TO CEPHALOPODS Outline of Experiment_______________________________________________________ 3.1 Introduction 3.5 Common Genera of Ammonoids Expected Learning Skills 3.6 Laboratory Exercises 3.2 Requirements 3.7 Results and Discussion 3.3 Cephalopods: Systematics, General 3.8 References Morphology and Age Range 3.9 Further/Suggested Readings 3.4 Common Genera of Nautiloids 3.1 INTRODUCTION In the previous experiment, you have made line drawings and described morphological characters along with palaeoecology and stratigraphic range of various genera of bivalves (pelecypods). Every genus of bivalves displays a set of distinctive morphological characters, on which basis they can be differentiated from each other. You know that bivalves show a wide range of adaptation, from marine to freshwater and from infaunal burrowers, epifaunal to active swimmers. Therefore, marine bivalves possess different morphological characters as compared with those of non-marine forms. In this experiment, you will work with some common genera of cephalopod molluscs. They are exclusively marine animals and are more active, quick movers, intelligent carnivorous predators with varied shell morphology. They occupy the same ecological niche as fishes. The Class Cephalopoda consists of three subclasses: Nautiloidea, Ammonoidea and Coleoidea. Among which Nautiloidea and extinct Ammonoidea are commonly found as fossils. The third subclass, Coleoidea, comprises BGYCL………………………………………………………………………………………………….….............….…...-138 Stratigraphy and Palaeontology: Laboratory primarily soft bodied animals. Like fishes, cephalopods are equipped with highly developed eyes and sensory organs. They are adapted to fast swimming and have developed more efficient mechanisms to locate their prey, detect predators and to escape from them.
    [Show full text]
  • Biostratigraphy, Lithostratigraphy, Ammonite Taxonomy and Microfacies Analysis of the Middle and Upper Jurassic of Norteastern Iran
    Biostratigraphy, Lithostratigraphy, ammonite taxonomy and microfacies analysis of the Middle and Upper Jurassic of norteastern Iran. Dissertation zur Erlangung des Naturwissenschaftlichen Doktorgrades Der Bayerischen Julius-Maximilians-Universität Würzburg vorgelegt von Mahmoud Reza Majidifard aus Teheran Würzburg, 2003-10-22 I To my wife and my daughter II Abstract The Middle and Upper Jurassic sedimentary successions of Alborz in northern Iran and Koppeh Dagh in northeastern Iran comprise four formations; Dalichai, Lar (Alborz) and Chaman Bid, Mozduran (Koppeh Dagh). In this thesis, the biostratigraphy, lithostratigraphy, microfacies, depositional environments and palaeobiogeography of these rocks are discussed with special emphasis on the abundant ammonite fauna. They constitute a more or less continuous sequence, being confined by two tectonic events, one at the base, in the uppermost part of the Shemshak Formation (Bajocian), the so-called Mid-Cimmerian Event, the other one at the top (early Cretaceous), the so-called Late-Cimmerian Event. The lowermost unit constitutes the uppermost member of a siliciclastic and partly continental depositional sequence known as Shemshak Formation. It contains a fairly abundant ammonite fauna ranging in age from Aalenian to early Bajocian. The following unit (Dalichai Formation) begins everywhere with a significant marine transgression of late Bajocian age. The following four sections were measured: The Dalichai section (97 m) with three members; the Golbini-Jorbat composite section (449 m) with three members of the Dalichai Formation (414 m) and two members of the Lar Formation (414 m); the Chaman Bid section (1556 m) with seven members, and the Tooy-Takhtehbashgheh composite section (567 m) with three members of the Dalichai Formation (567 m) and four members of the Mozduran Formation (1092 m).
    [Show full text]