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Corbinites (Subfamily Lithacoceratinae), a new genus for the giant western Canadian Late Kimmeridgian or Tithonian (Late Jurassic) ammonite Titanites occidentalis Frebold

Poulton Terence P.

Volumina Jurassica

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2023

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Vol. 21

27--38

EN

The finding of two new specimens and a reappraisal of the single original specimen of the problematic giant Canadian Late Ju- rassic ammonite Titanites occidentalis Frebold results in the creation of Corbinites, n. gen. It is assigned to the ataxioceratid subfamily Lithacoceratinae largely because of the presence of variocostate and previously unrecognized ataxioceratoid ribbing in middle and late growth stages. With enigmatic ancestry and geographically removed other forms with similar characteristics, the species may have been endemic in the relatively isolated early Alberta foreland basin of western interior Canada.

2

Mosasauroid predation on an ammonite – Pseudaspidoceras – from the Early Turonian of south-eastern Morocco

Gale A. S., Kennedy W. J., Martill D.

Acta Geologica Polonica

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2017

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Vol. 67, no. 1

31--46

EN

A juvenile specimen of the ammonite Pseudaspidoceras from the Early Turonian of the Goulmima area in the Province of Er-Rachida in south-eastern Morocco shows clear evidence of predation by a tooth-bearing verte-brate. Most of the body chamber is missing, as a result of post-burial compactional crushing. The adapertural part of the shell on the left flank of the surviving fragment of body chamber bears six circular punctuations; the right flank four. These are interpreted as the product of a single bite by a mosasauroid, probably a Tethysaurus. The taxonomy of the Goulmima Pseudaspidoceras is discuused in an appendix.

3

The lower and middle Berriasian in Central Tunisia: Integrated ammonite and calpionellid biostratigraphy of the Sidi Kralif Formation

Maalaoui K., Zargouni F.

Acta Geologica Polonica

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2016

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Vol. 66, no. 1

43--58

EN

The lower and middle Berriasian sedimentary succession of the Sidi Kralif Formation has been a subject of biostratigraphic study in two key sections in Central Tunisia. Our contribution is an attempt to better define the basal Berriasian interval, between the Berriasella jacobi Zone and the Subthurmannia occitanica Zone. Zonal schemes are established using ammonites and calpionellids, and these permit correlation with other regions of Mediterranean Tethys and beyond. The use of biomarkers afforded by microfossil groups has allowed characterization and direct correlation with four widely accepted calpionellid sub-zones, namely Calpionella alpina, Remaniella, Calpionella elliptica and Tintinopsella longa. The two ammonite zones of Berriasella jacobi and of Subthurmannia occitanica are recognised on the basis of their index species. The parallel ammonite and calpionellid zonations are useful as a tool for correlation and calibration in time and space, thus allowing a better definition of a J/K boundary. The presence of four Berriasian calpionellid bioevents is recognised: (1) the ‘explosion’ of Calpionella alpina, (2) the first occurrence of Remaniella, (3) the first occurrence of Calpionella elliptica and (4) the first occurrence of Tintinopsella longa. The last is here documented as coeval with the presence of Subthurmannia occitanica, which marks the lower/middle Berriasian boundary.

4

The ammonite genus Prionocycloceras Spath, 1926, from the Coniacian of KwaZulu-Natal, South Africa

Klinger H. C., Kennedy W. J.

Acta Geologica Polonica

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2016

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Vol. 66, no. 4

663--669

EN

Subprionocyclus latiumbilicatus Van Hoepen, 1968, and Subprionocyclus obesus Van Hoepen, 1968, are revised, and referred to Prionocycloceras Spath, 1926, a genus not previously recognised from the South African Cretaceous. The material comes from the Middle and Upper Coniacian St Lucia Formation of northern KwaZulu-Natal.

5

In his own words

Johnson K., Baysinger D., Cobban W. A.

Acta Geologica Polonica

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2016

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Vol. 66, no. 4

III-XIII

EN

Bill Cobban in conversation with Kirk Johnson and Dave Baysinger, 19 February, 2010.

6

Lower and Middle Cenomanian ammonites from the Morondava Basin, Madagascar

Kennedy W. J., Walaszczyk I., Gale A. S., Dembicz K., Praszkier T.

Acta Geologica Polonica

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2013

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Vol. 63, no. 4

625--655

EN

Lower and Middle Cenomanian ammonite assemblages have been collected on a bed-by-bed basis from localities at Vohipaly and Mahaboboka, Madagascar, as well as from outcrops around Berekata, all in the Morondava Basin, southwest Madagascar. These collections demonstrate the presence of the upper Lower Cenomanian Mantelliceras dixoni Zone and the lower Middle Cenomanian Cunningtoniceras inerme Zone of the north-western European standard sequence. These records indicate that the striking anomalies in the zonal assemblages of the classic divisions of the Madagascan Cenomanian are based on mixed assemblages, rather than a succession that differs radically from that elsewhere in the world. The dixoni Zone fauna is: Desmoceras cf. latidorsatum (Michelin, 1838), Pachydesmoceras kossmati Matsumoto, 1987, Forbesiceras sp., F. baylissiWright & Kennedy, 1984, F. largilliertianum (d'Orbigny, 1841), Mantelliceras cantianum Spath, 1926a, M. dixoni Spath, 1926b, M. mantelli (J. Sowerby, 1814), M. picteti Hyatt, 1903, M. saxbii (Sharpe, 1857), Sharpeiceras sp., S. falloti (Collignon, 1931), S. mocambiquense (Choffat, 1903), S. cf. florencae Spath, 1925, Acompsoceras renevieri (Sharpe, 1857), A. tenue Collignon, 1964, Calycoceras sp., Mrhiliceras lapparenti (Pervinquičre, 1907), Mariella (Mariella) stolizcai (Collignon, 1964), Hypoturrilites taxyfabreae (Collignon, 1964), Turrilites scheuchzerianus Bosc, 1801, Sciponoceras cucullatum Collignon, 1964, and Sciponoceras antanimangaensis (Collignon, 1964). The presence of Calycoceras in a Lower Cenomanian association represents a precocious appearance of a genus typically Middle and Upper Cenomanian in occurrence, and matches records from Tunisia. The inerme Zone yields a more restricted assemblage: Pachydesmoceras kossmati, Forbesiceras baylissi, Acanthoceras sp. juv., Cunningtoniceras cunningtoni (Sharpe, 1855) and Hypoturrilites taxyfabreae.

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Stratigraphically important ammonites from the Campanian-Maastrichtian boundary interval of the Middle Vistula River section, central Poland

Machalski M.

Acta Geologica Polonica

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2012

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Vol. 62, no. 1

91-116

EN

The formal definition of the Global Stratotype Section and Point (GSSP) for the base of the Maastrichtian Stage at Tercis, southwest France, is based on the first or last occurrences of twelve taxa, including three species of ammonites, Pachydiscus (Pachydiscus) neubergicus, Diplomoceras cylindraceum, and Nostoceras (Nostoceras) hyatti. The taxonomy and stratigraphical distribution of these, and allied forms, are studied, on the basis of material from the opoka succession across the upper Campanian.lowermost Maastrichtian boundary in the Middle Vistula River section, central Poland. in view of the imprecise location of two ammonite GSSP markers in that section, a direct ammonite-based correlation with the GSSP at Tercis is impossible. however, data available indicate that in the Middle Vistula River section the first occurrence of Pachydiscus (P.) neubergicus and the last occurrence of Nostoceras (N.) hyatti are situated significantly higher than the first occurrence of Belemnella lanceolata, the traditional belemnite marker for the base of the Maastrichtian Stage in the Boreal Realm, and that Diplomoceras cylindraceum appears significantly below this level. There are no unequivocal records of Pachydiscus (P.) neubergicus from the Belemnella lanceolata Zone s.l. in the Middle Vistula River section.

8

Early Cretaceous ammonites from the Butkov Quarry (Manin Unit, Central Western Carpathians, Slovakia)

Vasicek Z.

Acta Geologica Polonica

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2010

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Vol. 60, no. 3

393-415

EN

The taxonomic and stratigraphic study of rich ammonite material from the Lower Cretaceous deposits of the Butkov Quarry, near Ladce (ManIn Unit, Slovak Central Carpathians) is presented. More than 55 ammonite species are recognised and twenty-one biostratigraphically significant ammonite species are described, with one species, Sarasinella subdensicostata, described as new. The recognised taxa document an interval from the Upper Valanginian through to the Lower Hauterivian. The ammonite assemblage represents the Mediterranean bioprovince, with only a single species, Dichotomites evolutus, from the Boreal bioprovince.a new ammonite zone, the Teschenites flucticulus Zone, is proposed for the basal Hauterivian in the Western Carpathians.

9

Oxfordian and Kimmeridgian of the northeastern margin of the Holy Cross Mountains, Central Poland

Gutowski J.

Kwartalnik Geologiczny

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1998

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Vol. 42, nr 1

59-72

EN

In Late Jurassic the area of Central Poland was a part of the northern Tethyan shelf which developed in the margins of the East European Craton. The present day NE margin of the Holy Cross Mountains was situated in a proximal part of thhis shelf. The Oxfordian sedimentationbegan with open shelf, sponge-algal mudstones of the mariae, cordatum, and plicatilis Zones. During the latest transversarium and bifurcatus Chrons, shallow water biogenic and oncolitic facies developed. They were, in turn, replaced during the Late Oxfordian and the Early Kimmeridigian by oolitic-bioclastic grainstones and laminites. During the divisum Chron and the Late Kimmeridgian oyster shellbeds and clays were deposited. Within the studied sequence thirteen lithostratigraphic units are esablished and described. The collected ammonite fauna document the following ammonite zones: mariaem cordatum, plicatilis, transversarium, bifurcatus, planula, hypselocyclum and divisum.

PL

Opracowanie przedstawia syntezę lito- i biostratygrafii utworów górnojurajskich północno-wschodniego obrzeżenia Gór Świętokrzyskich odsłaniających się między Dobrutem i Wierzbicą, w okolicach Iłży, w dolinie Kamiennej od Przepaści, przez Bałtów po Skarbkę oraz nad Wisłą w Zawichoście i Rachowie. Na podstawie 76 profili z odsłonięć i otworów wiertniczych wyróżniono 13 nieformalnych jednostek stratygraficznych. Obejmują one zarówno osady dolnego i niższej części środkowego oksfordu wykształcone w facji gąbkowej i mikrytowej otwartego szelfu, jak i utwory płytkowodnej facji platformy węglanowej, tworzone od przełomu poziomów transversarium i bifurcatus, a wykształcone początkowo jako wapienie biogeniczne z koralami, a następnie wapienie onkolitowe, oolitowe oraz laminaty i wreszcie (od poziomu divisum) - muszlowce ostrygowe i margle. Na podstawie kolekcji amonitów obejmującej 94 okazy udokumentowano następujące poziomy amonitowe: mariae, cordatum, plicatilis, transversarium, bifurcatus, planula, hypsalocyclum oraz divisum. W wyniku neokimeryjskiego ścięcia erozyjnego utwory neokomu lub albu kontaktują z różnymi ogniwami górnej jury. Najgłębiej neokimeryjska erozja sięgnęła w rejonie Ożarowa, gdzie piaskowce albu kontaktują bezpośrednio z muszlowcami ostrygowymi poziomu divisum.