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290 results for “Cenomanian”
Figure 1 in A new species of the genus Trematosphindus Li et Cai, 2021 (Coleoptera: Sphindidae) from Cenomanian Taimyr amber
Figure 1. Trematosphindus kirejtshuki sp. n., PIN 3426/258, head and prosternum, lateral view, Taimyr amber.
Figure 3 in A new species of the genus Trematosphindus Li et Cai, 2021 (Coleoptera: Sphindidae) from Cenomanian Taimyr amber
Figure 3. Trematosphindus kirejtshuki sp. n., PIN 3426/258, head and pronotum, dorsal view, Taimyr amber.
Fig. 10 in Origin and significance of Late Cretaceous bioevents: Examples from the Cenomanian
Fig. 10. Synoptic representation of Cenomanian bioevents summarizing their main features and genetic processes. For key of symbols see Fig. 9.
Fig. 5 in Ammonoid biodiversity changes across the Cenomanian-Turonian boundary in the Yezo Group, Hokkaido, Japan
Fig. 5. Temporal changes in faunal components of ammonoid species richness in the Mikasa area. Abbreviations: CIUs, carbon isotopic units; e., early; m., middle.
Fig. 9 in Origin and significance of Late Cretaceous bioevents: Examples from the Cenomanian
Fig. 9. Conceptual model of bioevent formation in a Cenomanian depositional sequence. A. Sea−level curve and sequence stratigraphic subdivision. B. Resultant stratigraphic section and bioevents. Note that in high−frequency sequences, genetically similar bioevents may develop on shorter time−scales. Not to scale. Abbreviations: ETB, early transgressive bioevent; FSST, falling stage systems tract; HST, highstand systems tract; LHB, late highstand bioevent; LST, lowstand systems tract; MFB, maximum flooding bioevent; SB, sequence boundary; TST, transgressive systems tract.
Fig. 8 in Origin and significance of Late Cretaceous bioevents: Examples from the Cenomanian
Fig. 8. Stratigraphic log of the Early Cenomanian "Inoceramus" crippsi Event in the Ascheloh quarry (near Halle/Westfalen, northern Germany) as an example for a composite late highstand bioevent (modified after Richardt 2010). SB Ce 1, sequence boundary Cenomanian 1. For key of symbols see Fig. 9.
Fig. 6 in Origin and significance of Late Cretaceous bioevents: Examples from the Cenomanian
Fig. 6. Inoceramid bivalves from maximum flooding (A–C) and late highstand bioevents (D). All specimens are in the collection of the Senckenberg Naturhistorische Sammlungen Dresden (MMG) and illustrated in natural size. A–C. Specimens of Inoceramus ex gr. virgatus Schlüter, 1877 from the Early Cenomanian Schloenbachia/Inoceramus virgatus Event. Note the excellent preservation (A) as well as butterfly (B) and bivalved (C) specimens (repository NK). D. Slab of the Early Cenomanian "Inoceramus" crippsi Event (repository NWK) from the Ascheloh quarry (near Halle/Westfalen, northern Germany) as an example of an amalgamated (multiple−event) late highstand bioevent (cf. Fig. 8). Note shelly bioclastic fabric and convex−up position of shells.
Fig. 7 in Origin and significance of Late Cretaceous bioevents: Examples from the Cenomanian
Fig. 7. Palaeoecologic reconstruction of the Late Cenomanian Inoceramus pictus−II Event as an example for a single−event late highstand bioevent based on analysis of the Wunstorf section (northern Germany, Hannover area).
Fig. 3 in Origin and significance of Late Cretaceous bioevents: Examples from the Cenomanian
Fig. 3. Principal positions of Cenomanian bioevents in a 3rd−order depositional sequence exemplified by depositional sequence (DS) Ce 4. Abbreviations: FSST, falling stage systems tract; HST, highstand systems tract; Lo., Lower; LST, lowstand systems tract; SB, sequence boundary; TST, transgressive systems tract. The coloured fields differentiate systems tracts.
Fig. 4 in Origin and significance of Late Cretaceous bioevents: Examples from the Cenomanian
Fig. 4. Sketch (strongly vertically exaggerated) explaining the formation of early transgressive bioevents of the lag subtype with resultant stratigraphic section in Cenomanian epicontinental shelf settings of NW Europe. Abbreviations: FWWB, fair−weather wave−base; HST, highstand systems tract; SWB, storm wave−base; TST, transgressive systems tract. For key of symbols see Fig. 9.
Fig. 2 in Origin and significance of Late Cretaceous bioevents: Examples from the Cenomanian
Fig. 2. Synoptic bio−, event and sequence stratigraphy of the Cenomanian stage in NW Europe. Absolute ages after Gradstein et al. (2004). Abbreviations: ETB, early transgressive bioevent; FSST, falling stage systems tract; HST, highstand systems tract; LHB, late highstand bioevent; LST, lowstand systems tract; MFB, maximum flooding bioevent; SB, sequence boundary; TST, transgressive systems tract. The coloured fields differentiate systems tracts.
Fig. 1 in Origin and significance of Late Cretaceous bioevents: Examples from the Cenomanian
Fig. 1. Palaeogeography of the study area on the NW European epicontinental shelf (map modified after Philip and Floquet 2000).
Fig. 4 in Ammonoid biodiversity changes across the Cenomanian-Turonian boundary in the Yezo Group, Hokkaido, Japan
Fig. 4. Temporal changes in ammonoid species richness, extinction, and origination rates in the Mikasa, Obira, and Oyubari areas. Abbreviations: CIUs, carbon isotopic units; CTBE, Cenomanian–Turonian boundary event; e., early; m., middle.
Fig. 2 in Ammonoid biodiversity changes across the Cenomanian-Turonian boundary in the Yezo Group, Hokkaido, Japan
Fig. 2. Composite columnar sections in the Mikasa (A), Obira (B), and Oyubari (C) areas and the stratigraphical levels of macrofossil datum planes used in the present study. The shaded portion shows the Cenomanian–Turonian boundary event (CTBE). The molluscan fossil data are from Tanabe et al. (1977), Futakami (1986), Kurihara and Kawabe (2003), Funaki and Hirano (2004), Kurihara et al. (2007) and unpublished original data. The planktonic foraminiferal zonation and the CTBE are from Hasegawa (1997, 1999), Nishi et al. (2003), Kurihara (2006), and Uramoto et al. (2007, 2009). Abbreviations: Ka, Katsurazawa Formation; Hk, Hikagenosawa Formation; mdst, mudstone; sdst, sandstone; A. nipponicus, Actinoceramus nipponicus; Hel. helvetica, Helvetoglobotruncana helvetica; I. hobetsensis, Inoceramus hobetsensis nonsulcatus; I. kamuy, Inoceramus kamuy; W. arc., Whiteinella archaeocretacea.
Fig. 3 in Ammonoid biodiversity changes across the Cenomanian-Turonian boundary in the Yezo Group, Hokkaido, Japan
Fig. 3. Correlation of Upper Cretaceous δ13C stratigraphy of terrestrial organic materials in the Mikasa, Obira, and Oyubari areas, Japan and reference δ13C stratigraphy of carbonates in Europe (after Jarvis et al. 2006). Six carbon isotopic units (CIUs) were identified in the present study. Abbreviations: e., early; m., middle; PDB, Pee Dee Belemnite Standard; Aj, Acanthoceras jukesbrownei; An, Actinoceramus nipponicus; Ar, Acanthoceras rhotomagense; Ca, Calycoceras spp.; Cg, Calycoceras guerangeri; Ci, Cunningtoniceras inertme; Cu, Cunningtoniceras spp.; Cw, Collignoniceras woollgari; Fc, Fagesia catinus; Ih, Inoceramus hobetsensis; Ik, Inoceramus kamuy; Md, Mantelliceras dixoni; Mg, Metoicoceras geslinianum; Mn, Mammites nodosoides; Nj, Neocardioceras juddii; Wd, Watinoceras devonense.
Fig. 2. Early angiosperm Pseudoasterophyllites cretaceus O in The early angiosperm Pseudoasterophyllites cretaceus from Albian-Cenomanian of Czech Republic and France revisited
Fig. 2. Early angiosperm Pseudoasterophyllites cretaceus O. Feistmantel ex Velenovský, 1887 from the Late Cretaceous of Pecinov (unit 3), Czech Republic (A, D, E; SEM photographs) and Les Renardières, France (B, C). A. Isolated stamen showing apical extension of connective, NMP F 2880c. B. Macerated stamen showing two pairs of pollen sacs, UL REN 001. C. Detail of macerated stamen showing pollen in situ, UL REN 002. D. Detail of the apical extension of connective, NMP F 2880c. E. Epidermis surface of the apical extension of connective showing paracytic stomata and papillae, NMP F 2880c. Scale bars: A 1 mm, B 0.5 mm, C 100 µm, D 150 µm, E 60 µm.
Fig. 1. Early angiosperm Pseudoasterophyllites cretaceus O in The early angiosperm Pseudoasterophyllites cretaceus from Albian-Cenomanian of Czech Republic and France revisited
Fig. 1. Early angiosperm Pseudoasterophyllites cretaceus O. Feistmantel ex Velenovský, 1887 from the Late Cretaceous (Cenomanian) of Czech Republic. A. Lectotype, branched leafy axis, Lipenec, NMP F 654. B. Detail of lectotype, showing semi−whorled arrangement of leaves, Lipenec, NMP F 654. C. Leaf cuticle with stomata arranged perpendicularly, longitudinally, and obliquely to the leaf axis, Pecínov (unit 3), NMP F 2880a. D. External surface of paracytic stoma, Pecínov (unit 3), NMP F 2880a. E. Papillae in marginal part of the leaf, Pecínov (unit 3), NMP F 2880b. F. Axilary branches on a leafy twig, Pecínov (unit 3), NMP F 2880. Scale bars A, B 5 mm; C 100 µm; D, E 50 µm; F 10 mm.
Fig. 3 in The early angiosperm Pseudoasterophyllites cretaceus from Albian-Cenomanian of Czech Republic and France revisited
Fig. 3. Pollen Tucanopollis sp. from the stamen on Fig. 2C, which is associated with the vegetative parts of angiosperm Pseudoasterophyllites cretaceus O. Feistmantel ex Velenovský, 1887 from the Late Cretaceous of Les Renardières, France, specimens UL REN 002. A. Monosulcate pollen grain in situ showing irregular sulcus area. B. Microechinate, perforate exine sculpturing, detail of pollen exina. C. Monosulcate pollen grain in situ showing sulcus area. D. Pollen grain in situ showing Ubish bodies. Scale bars: A 10 µm, B–D 1 µm.
Fig. 2 in The oldest Brazilian snakes from the Cenomanian (early Late Cretaceous)
Fig. 2. Trunk vertebra of the snake Seismophis septentrionalis gen et sp. nov. (CPHNA-MA VT 1221) from the Cenomanian (early Late Cretaceous) of Falésia do Sismito, Cajual Island, Maranhão, northeastern Brazil. Photographs (A –E) and explanatory drawings (A –E), in anterior (A), posterior (B), 1 1 2 2 lateral (C), dorsal (D), and ventral (E) views.
Fig. 1. A in The oldest Brazilian snakes from the Cenomanian (early Late Cretaceous)
Fig. 1. A. Location map of Cajual Island. Asterisk shows Falésia do Sismito locality. B. Stratigraphy of São Luís-Grajaú Basin (modified from Rossetti 2001).
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