Find research datasets worth reusing

Fig. 11 in Palaeobiology and evolutionary context of Angulithes mermeti, a streamlined early Late Cretaceous shallow-water nautiloid

Fig. 11. Geochronology (Ogg and Hinnov 2012), ammonite biostratigraphy (Wright and Kennedy 2017) and sequence stratigraphy (Robaszynski et al. 1998; Wilmsen 2003) of the Cenomanian Stage plotted against evolutionary trends in the hercoglossid nautiloid genus Angulithes. See text for further explanations.

Fig. 2 in Palaeobiology and evolutionary context of Angulithes mermeti, a streamlined early Late Cretaceous shallow-water nautiloid

Fig. 2. Shell parameters, suture terminology, and biometric factors of the planispiral nautiloid shell (modified after Wilmsen 2016). Abbreviations: Dmax, maximum diameter; U, umbilical width at Dmax; Wb, whorl breadth at Dmax; Wh, whorl height at Dmax.

Fig. 9 in Palaeobiology and evolutionary context of Angulithes mermeti, a streamlined early Late Cretaceous shallow-water nautiloid

Fig. 9. Reconstruction of the life position of the hercoglossid nautilid Angulithes mermeti (Coquand, 1862) in sagittal cross-section (A1) and apertural view (A2) (approximately 1/2 of natural size).

Fig. 6 in Palaeobiology and evolutionary context of Angulithes mermeti, a streamlined early Late Cretaceous shallow-water nautiloid

Fig. 6. Shell form (A1–C1), external sutures (A2–C2), and whorl cross-section (D) of selected hercoglossid nautiloids. A. Nautilus mermeti (Coquand, 1862) from the Cenomanian of Ténoukla near Tébassa, northeast Algeria (after Coquand 1862: pl. 2: 1, 2). B. Nautilus munieri Choffat, 1886 from the upper Cenomanian of Villa Nova d'Ourem, Portugal (after Choffat 1886: pl. 2: 1). C. Angulithes triangularis Montfort, 1808 (MB.C.2052) from the lower Sardinero Formation, lower Middle Cenomanian of Langre, Cantabria, northern Spain (after Wilmsen 2000: pl. 1: 2b, pl. 5: 15). D. Nautilus triangularis Montfort, 1808 from the Cenomanian of Île de Madame, Charente-Maritime, France (after d'Orbigny 1840: pl. 12: 2).

Fig. 4 in Palaeobiology and evolutionary context of Angulithes mermeti, a streamlined early Late Cretaceous shallow-water nautiloid

Fig. 4. Hercoglossid nautiloid Angulithes mermeti (Coquand, 1862) from the Cenomanian of Wadi Ghonima, Egypt. A. AFK 202 in lateral (A1, A3) and ventral (A2) views. B. AFK 218 in lateral (B1) and apertural (B2) views; arrow shows the position of the siphuncle.

Fig. 3 in Palaeobiology and evolutionary context of Angulithes mermeti, a streamlined early Late Cretaceous shallow-water nautiloid

Fig. 3. Hercoglossid nautiloid Angulithes mermeti (Coquand, 1862), AFK 225 from the Cenomanian of Wadi Ghonima, Egypt, in apertural (A1) and lateral (A2) views.

Fig. 8 in Palaeobiology and evolutionary context of Angulithes mermeti, a streamlined early Late Cretaceous shallow-water nautiloid

Fig. 8. Westermann morphospace diagram, simplified and modified after Ritterbush et al. (2014), with placement of the hercoglossid nautiloid Angulithes mermeti (Coquand, 1862) (see Table 2 for raw data; black circle indicates mean value); for comparison, two specimens of Nautilus pompilius Linnaeus, 1758 are plotted in the diagram, too (1, specimen 17 of Tajika et al. 2015; 2, an early Pleistocene specimen from Wani et al. 2008).Abbreviations: Th, shell inflation; U, umbilical exposure; w, whorl expansion.

Fig. 5 in Palaeobiology and evolutionary context of Angulithes mermeti, a streamlined early Late Cretaceous shallow-water nautiloid

Fig. 5. Cross-sections and external sutures of the hercoglossid nautiloid Angulithes mermeti (Coquand, 1862) from the Cenomanian of Wadi Ghonima, Egypt. A. AFK 225, shell shape in apertural view (A1), external sutures (A2); grey shading indicates position of the umbilical saddle. B. AFK 202, shell shape in ventral view. C. AFK 218, whorl shape, showing the position of the siphuncle.

Fig. 10 in Palaeobiology and evolutionary context of Angulithes mermeti, a streamlined early Late Cretaceous shallow-water nautiloid

Fig. 10. Palaeoecology of the hercoglossid nautiloid Angulithes mermeti (Coquand, 1862). A. Reconstruction of A. mermeti (Coquand, 1862) in the lagoonal shallow-water environment of the Galala Formation (background after a subaqueous photograph in the property of MW from a lagoonal site in the present-day Red Sea near Hughhada taken in 1999, treated by greyscale-filtering in Photoshop CS2); rudist illustrations from Mitchell (2002). B. Bioclastic rudist (r) floatstone, the lagoonal host sediment in which A. mermeti has been found in the Wadi Ghonima section (thin-section photomicrograph of sample 080217-18). C. Close-up of Fig. 9B showing the bioclastic packstone matrix in detail, including numerous fragments of dasycladalean algae (gr).

Fig. 7 in Palaeobiology and evolutionary context of Angulithes mermeti, a streamlined early Late Cretaceous shallow-water nautiloid

Fig. 7. Palaeobiogeographical distribution of the hercoglossid nautiloid Angulithes mermeti (Coquand, 1862). Cenomanian palaeogeographical and plate tectonic situation modified after Barrier and Vrielynck (2008); nautiloid occurrences are indicated by asterisks (see text for literature sources). Abbreviations: APB, Anglo-Paris Basin; MEI, Mid-European Island,

opencc-by-4.0Dec 2011View details →

Fig. 2 in A new centrosaurine from the Late Cretaceous of Alberta, Canada, and the evolution of parietal ornamentation in horned dinosaurs

Fig. 2. Reconstruction of the skull of Spinops sternbergorum gen. et sp. nov. from the Campanian of Dinosaur Provincial Park, southern Alberta, in right lateral view. Preserved elements are stippled; missing portions are dotted and modeled after Centrosaurus apertus.

opencc-by-4.0Dec 2011View details →

Fig. 6 in A new centrosaurine from the Late Cretaceous of Alberta, Canada, and the evolution of parietal ornamentation in horned dinosaurs

Fig. 6. Phylogenetic hypotheses for relationships within Ceratopsidae, focusing on Centrosaurinae. A. Strict reduced consensus tree using "traditional" codings for the epiparietal homologies in selected centrosaurines (see text), with Sinoceratops zhuchengensis and Rubeosaurus ovatus removed. B. Strict consensus tree using "new" codings for epiparietal homologies, following a posteriori deletion of Sinoceratops zhuchengensis and Centrosaurus brinkmani. At selected nodes, the top number indicates Bremer support and the bottom number indicates bootstrap support values above 50%.

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. 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.