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Cylindroteuthis

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Journal Article
Journal: PALAIOS
Published: 01 September 2015
PALAIOS (2015) 30 (9): 645–654.
... isotope data derived from the calcitic rostra of the belemnites ( Cylindroteuthis ) show modest variability, ranging from −1.2 to 0.9‰ (V-PDB), while their accompanying aragonitic phragmocones range from −1.4 to 0.0‰. Data derived from the ammonite Kosmoceras show some scatter, with oxygen isotope values...
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Photographs.  A ) a  <b>Cylindroteuthis</b>  rostrum with its accompanying phragmo...
in > PALAIOS
Published: 01 September 2015
Fig. 2.— Photographs. A ) a Cylindroteuthis rostrum with its accompanying phragmocone still associated. B , C) Near-complete Belemnotheutis phragmocones with their diminutive rostra visible at their proximal ends. D ) Iridescent fragment of Kosmoceras grp phaeinum.
Journal Article
Published: 01 December 2004
Journal of the Geological Society (2004) 161 (6): 959–968.
... the genera Lagonibelus , Cylindroteuthis and Acroteuthis . These new data indicate a shift to lower temperatures from the late Volgian into the late Valanginian, with some warmer phases recognized within the Ryazanian and earliest Valanginian. The lowest temperatures of the late Valanginian, consistent...
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SEM photomicrographs.  A ) Wall of  Belemnotheutis  phragmocone (Sample PRW...
in > PALAIOS
Published: 01 September 2015
Fig. 3.— SEM photomicrographs. A ) Wall of Belemnotheutis phragmocone (Sample PRW297), showing two prismatic layers. B ) Nacreous layers in Cylindroteuthis phragmocone showing typical stacked arrangement of hexagonal tablets. C , D ) Plane polarized and CL photomicrographs, respectively
Image
Aragonite-calcite contrasts and temperature estimates.  A ) Cross plot of  ...
in > PALAIOS
Published: 01 September 2015
Fig. 6.— Aragonite-calcite contrasts and temperature estimates. A ) Cross plot of δ 18 O and δ 13 C data from Cylindroteuthis. Aragonite-calcite pairs are given for seven specimens whose calcitic rostrum (filled circles) remained attached to its corresponding aragonitic phragmocone (filled
Journal Article
Published: 01 January 2017
Bulletin de la Société Géologique de France (2017) 188 (1-2): 1–9.
... belemnite beds were considered to correspond closely with the Oxycerites jugatus ammonite Subzone of the Arcticocephalites arcticus Zone. The bases of all these biostrata currently coincide with the Lower-Upper Bajocian boundary ( figs. 2 – 4 ). In the Yuryung-Tumus section, the Cylindroteuthis...
Journal Article
Published: 08 October 2019
Geological Magazine (2020) 157 (10): 1715–1728.
... Cretaceous of northwest Europe . Newsletters on Stratigraphy 3 , 193 – 204 . Saks VN and Nalnyaeva TI ( 1964 ) Upper Jurassic and Lower Cretaceous belemnites of the northern USSR . The genera Cylindroteuthis and Lagonibelus . Leningrad : Nauka Press . 168 pp. [in Russian...
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Journal Article
Journal: AAPG Bulletin
Published: 01 October 1937
AAPG Bulletin (1937) 21 (10): 1344–1346.
... cetera ) 15 Belemnoids ( Cylindroteuthis, Belemnopsis, Acroteuthis, et cetera ) 17 Pelecypods ( Aucella, Inoceramus, Nucula, Lucina, Opis, et cetera ) 27 Gastropods ( Trochus Turbo, Itieria, Cerithium, et cetera ) 6 Brachiopods ( Rhynchonella ) 1 Total number known to date 66 ...
Journal Article
Published: 01 July 2018
Russ. Geol. Geophys. (2018) 59 (7): 864–890.
... on the fresh surface (brown ironstone). It contains a specific assemblage of macrofossils with ammonites Praetollia ( Pachypraetollia ) crassa , Craspedites ( Taimyro-ceras ) ex gr. sachsi , belemnite Cylindroteuthis cf. subobelis-coides , bivalve Turnus waldheimii and brachiopod Ptilorhynchia...
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Journal Article
Journal: Geology
Published: 01 March 2009
Geology (2009) 37 (3): 215–218.
... their original iridescent aragonitic nacre), belemnites, bivalves, gastropods, echinoids, serpulids, and wood. From this suite of fossils, isotopic analyses have been performed on oysters (Deltoideum delta), belemnites (Cylindroteuthis sp.), ammonites (aulacostephanids), “glassy” calcitic benthic foraminifera...
FIGURES
Journal Article
Published: 14 January 2008
Canadian Journal of Earth Sciences (2007) 44 (12): 1791–1796.
... ostreiids and veneroids, Gervillaria sp., Myophorella spp., Isognomon sp., Brachidontes sp., Weyla sp., Pinna sp., Pleuromya sp., Retroceramus spp., and Oxytoma (?) sp. The belemnite Cylindroteuthis sp. is also present. All these fossils are found within sandstones and conglomerates...
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Journal Article
Journal: Paleobiology
Published: 01 February 2020
Paleobiology (2020) 46 (1): 82–103.
... Wani et al. ( 2018 ) found no significant irregularities in septal spacing in three belemnitid species, earlier workers recorded variable septum densities in various extinct coleoids. For instance, changes in dorsal spacing of the sutures led Hewitt and Jagt ( 1999 ) to assume that Cylindroteuthis...
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Journal Article
Published: 01 March 2013
Russ. Geol. Geophys. (2013) 54 (3): 335–348.
.... Zone) in California contains Cylindroteuthis newvillensis And., whose range on Nordvik Peninsula begins at the top of the Craspedites taimyrensis ammonite Zone and ends within the Chetaites chetae Zone ( Dzyuba, 2012 ). The composition of the belemnite assemblage at the base of the Californian B. aff...
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Journal Article
Published: 01 July 2009
Journal of the Geological Society (2009) 166 (4): 633–641.
... Cylindroteuthis , Pachyteuthis and occasionally Belemnopsis . There appears to be no major differences between the isotope values derived from the different belemnite genera. The belemnites sampled were predominantly composed of translucent honey-coloured calcite, although several specimens displayed areas...
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Series: Geological Society, London, Special Publications
Published: 14 April 2020
DOI: 10.1144/SP498-2018-57
EISBN: 9781786204806
... Zone) 12.8–14.2 Cool Up to 200 Middle Cool-requiring Zakharov et al. (2018 b ) Belemnite Hibolites sp. Dubki, Saratov Upper Callovian (lamberti Zone, mojarovskii Horizon) 6.9–8.9 Cool >200 Middle Cool-requiring Wierzbowski & Rogov (2011) Belemnite Cylindroteuthis sp...
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Journal Article
Published: 01 August 2013
Russ. Geol. Geophys. (2013) 54 (8): 808–837.
... member ( Fig. 5 ). This is also a dramatic change of belemnite assemblages at this stage: the assemblage of bl-beds with Cylindroteuthis confessa corresponding to the Articoceras harlandi a-Zone, are replaced by a new assemblage with Cylindroteuthis aff. spathi . Belemnite Pachyteuthis cf...
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Journal Article
Journal: Geology
Published: 01 March 2010
Geology (2010) 38 (3): 251–254.
...., 1994 ). Belemnites ( Pachyteuthis sp., Cylindroteuthis sp., and Lagonibelus sp.) were most abundant in the organic-rich Rurikfjellet Formation, which consists of shales, siltstones, and sandstones forming several coarsening-upward sequences ( Dypvik et al., 1991 ), and are Berriasian–Valanginian...
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Journal Article
Published: 01 February 1994
Journal of the Geological Society (1994) 151 (1): 173–194.
... numbers of Cado- ceras, Longaeviceras, Hecticoceras, Horneoplanulites, Indo- sphinctes, Binatisphictes, Grossouvria and Reineckeia. The nautiloid Paracenoceras is present but rare. Dibranchiates include the belemnites Cylindroteuthis, which is abundant and grew to considerable size, the smaller...
Journal Article
Published: 01 May 2007
Proceedings of the Yorkshire Geological Society (2007) 56 (3): 159–176.
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Journal Article
Published: 01 February 1994
Journal of the Geological Society (1994) 151 (1): 113–124.
..., including microconchs with lappets. Ammonites may cover 20% of bedding surfaces; fragmented specimens, probably the result of predation, are sometimes common. Cadoceras and Paracenoceras are rare. Belemnites, mainly Cylindroteuthis, although common by most standards, are far subordinate to ammonites...