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290 results for “Cenomanian”
Fig. 1 in Ammonoid biodiversity changes across the Cenomanian-Turonian boundary in the Yezo Group, Hokkaido, Japan
Fig. 1. Map of the study areas (Mikasa, Obira, and Oyubari areas in Hokkaido, Japan).
Data from: A new Cenomanian acanthomorph fish from the El Chango quarry (Chiapas, South-Eastern Mexico) and its implications for the early diversification and evolutionary trends of acanthopterygians
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Data from: Palaeoclimatic reconstruction for a Cenomanian-aged angiosperm flora near Schefferville, Labrador
An understanding of local and regional climate trends is essential to investigate the remarkable angiosperm radiation that happened during the Albian-Cenomanian transition. However, many of the inland depositional environments pioneered by the first modern angiosperms are poorly represented in the fossil record. Eastern Canada in particular has a very poor Mesozoic record. In this paper, we present the first multivariate palaeoclimate analysis (CLAMP) for the environment of a geologically isolated woody dicot dominated flora found in the Redmond no.1 mine, Labrador, near Schefferville, with an estimated Cenomanian age. It reveals that the Redmond flora would have experienced a mean annual temperature of 15.1 ± 2.1 °C, one of the coolest recorded for North America at this time. These results confer the Redmond no.1 site a warm temperate and fully humid climate with a hot summer, in accordance with previous qualitative palaeoclimate estimates. This flora fits smoothly into palaeolatitudinal MAT gradients that use other Cenomanian-estimated North American floras. Despite an inland setting, the climate analysis does not recover a significantly higher degree of seasonality than the sites to which it is compared, which agrees with established climate equability models for the Cretaceous and Paleogene. This study also introduces 15 new morphotypes discovered in recent fieldwork. The eventual description of the species they represent may refine our dating estimates for the Redmond Formation. A greater understanding of the depositional environment and of the natural history of these angiosperms is required to improve this community's characterization, along with estimates from other proxies.
FIGURE 1. Joeranina houssineaui n in Preservation of internal pleurites in a new palaeocorystid crab (Crustacea, Brachyura, Raninoidia) from the Cenomanian (Upper Cretaceous) of Poitou-Charentes, France
FIGURE 1. Joeranina houssineaui n. sp., upper Cenomanian, 'Carrière du Mas', Roullet-Saint-Estèphe, Poitou-Charentes, southwest France. A, MAB k.3272 (holotype), dorsal view of carapace. B, MNHN.F.A49778 (paratype), dorsal view of carapace. C, MNHN.F.A49779 (paratype), dorsal view of carapace. D, E, MAB k.3273 (paratype), left lateral and dorsal views of carapace. All specimens whitened with ammonium chloride sublimate prior to photography. Scale bars 3 mm.
FIGURE 2. Joeranina houssineaui n in Preservation of internal pleurites in a new palaeocorystid crab (Crustacea, Brachyura, Raninoidia) from the Cenomanian (Upper Cretaceous) of Poitou-Charentes, France
FIGURE 2. Joeranina houssineaui n. sp., upper Cenomanian, 'Carrière du Mas', Roullet-Saint-Estèphe, Poitou-Charentes, southwest France. MAB k.3272 (holotype); A, left lateral view; B, ventral view; C, anterior/frontal view; D, posterior view; E, right lateral view. 1–8, thoracic sternites 1–8; a1, abdominal somite 1; aP1–aP5b, arthrodial cavity of P1–P5; ep, epistome; en, endostome; i, intestine; o, orbit; om, oxystomian mouth; pl4–pl7, pleurite 4–7; pt, pterygostome. Specimen whitened with ammonium chloride sublimate prior to photography. Scale bar 3 mm.
FIGURE 4 in A new crocodyliform from the Alcântara Formation (Cenomanian), Cajual Island, Brazil
FIGURE 4. Photographs and drawings of the lower jaw of Coringasuchus anisodontis gen. et. sp. nov. (MN 7128-V) in occlusal view (A, B). Scale bars = 10 mm. Anatomical abbreviations: a1-a5, alveoli; a6?, alveolus?; e, enamel; lab, labial dentary process; os, occlusal scar.
FIGURE 2 in A new crocodyliform from the Alcântara Formation (Cenomanian), Cajual Island, Brazil
FIGURE 2. Partial view of the Laje do Coringa site, showing the isolated and broken nature of the fossil remains.
FIGURE 1 in A new crocodyliform from the Alcântara Formation (Cenomanian), Cajual Island, Brazil
FIGURE 1. Location of Cajual Island and the Laje do Coringa site (modified from Medeiros & Schultz 2001).
FIGURE 5 in A new crocodyliform from the Alcântara Formation (Cenomanian), Cajual Island, Brazil
FIGURE 5. Photograph of the lower jaw of Coringasuchus anisodontis gen. et. sp. nov. (MN 7128-V) showing occlusal view of the third and fourth preserved alveoli. Scale bar = 5 mm.
FIGURE 3 in A new crocodyliform from the Alcântara Formation (Cenomanian), Cajual Island, Brazil
FIGURE 3. Photographs and drawings of the lower jaw of Coringasuchus anisodontis gen. et. sp. nov. (MN 7128-V) in lateral (A, B) and medial (C, D) views. Scale bars = 10 mm. Anatomical abbreviations: a1-a5, alveoli; a6?, alveolus?; d, dentary; fa, fractured area. Neurovascular foramina are indicated in the circles.
FIGURE 2 in The youngest and first Lebanese representative of the family Saucrosmylidae (Insecta, Neuroptera) from the Cenomanian
FIGURE 2. Lebanosmylus leae gen. et sp. nov., holotype, wing counterpart. A, Photograph. B, Photograph with inverted colors. C, Line drawing. Scale bars = 10 mm.
FIGURE 1 in The youngest and first Lebanese representative of the family Saucrosmylidae (Insecta, Neuroptera) from the Cenomanian
FIGURE 1. Lebanosmylus leae gen. et sp. nov., holotype, wing. A, Photograph. B, Photograph with inverted colors. C, Line drawing, terminology of venation after Liu et al. (2013). Scale bars = 10 mm.
text-fig. 6. Skull reconstructions of representatives of Cretaceous OTUs in left lateral view, a, abelisaurid Camotaurus sastrei, Late Cretaceous (Campanian), Gorro Frigio Formation, Argentina; based on Bonaparte et al. (1990) and MACN CH 894. b, composite skull of a generalized baryonychid; mainly based on Suchomimus tenerensis (MNN GDF 501, 503-506) and Irritator challenged (SMNS 58022), with some elements reconstructed after Baryonyx walkeri (BMNH R 9951). c, carcharodontosaurid Carcharodontosaurus sahariens, Late Cretaceous (Cenomanian), Kem Kem beds, Morocco; based on Sereno et al. (1996) and SGM-Din 1, unpreserved elements shaded. D, dromaeosaurid Velociraptor mongoliensis, Late Cretaceous (Campanian), Djadokhta Formation, Mongolia; based on Barsbold (1983), Barsbold and Osmólska (1999), and AMNH 6515. e, ornithomimosaur Dromiceiomimus brevitertius, Late Cretaceous (Maastrichtian), Horseshoe Canyon Formation, Alberta, Canada; redrawn from Russell (1972). F, oviraptorosaur Oviraptor philoceratops, Late Cretaceous (Campanian), Djadokhta Formation, Mongolia; redrawn from Barsbold et al. (1990). G, therizinosauroid Erlikosaurus andrewsi, Late Cretaceous (Cenomanian- Turonian), Baynshiren Svita, Mongolia; based on Clark et al. (1994). H, tyrannosaurid Gorgosaurus libratus, Late Cretaceous (Campanian), Judith River Formation, Alberta, Canada, redrawn from Molnar et al. (1990). Abbreviations as in Text-figures 4 and 5, and: acc. op., accessory opening of unknown function in the premaxilla of Oviraptor (Barsbold et al. 1990); amf, anterior maxillary foramen; pn, pneumatic openings. Scale bars represent 50 mm (d-g) and 100 mm (a-c, h). in The interrelationships and evolution of basal theropod dinosaurs
text-fig. 6. Skull reconstructions of representatives of Cretaceous OTUs in left lateral view, a, abelisaurid Camotaurus sastrei, Late Cretaceous (Campanian), Gorro Frigio Formation, Argentina; based on Bonaparte et al. (1990) and MACN CH 894. b, composite skull of a generalized baryonychid; mainly based on Suchomimus tenerensis (MNN GDF 501, 503-506) and Irritator challenged (SMNS 58022), with some elements reconstructed after Baryonyx walkeri (BMNH R 9951). c, carcharodontosaurid Carcharodontosaurus sahariens, Late Cretaceous (Cenomanian), Kem Kem beds, Morocco; based on Sereno et al. (1996) and SGM-Din 1, unpreserved elements shaded. D, dromaeosaurid Velociraptor mongoliensis, Late Cretaceous (Campanian), Djadokhta Formation, Mongolia; based on Barsbold (1983), Barsbold and Osmólska (1999), and AMNH 6515. e, ornithomimosaur Dromiceiomimus brevitertius, Late Cretaceous (Maastrichtian), Horseshoe Canyon Formation, Alberta, Canada; redrawn from Russell (1972). F, oviraptorosaur Oviraptor philoceratops, Late Cretaceous (Campanian), Djadokhta Formation, Mongolia; redrawn from Barsbold et al. (1990). G, therizinosauroid Erlikosaurus andrewsi, Late Cretaceous (Cenomanian- Turonian), Baynshiren Svita, Mongolia; based on Clark et al. (1994). H, tyrannosaurid Gorgosaurus libratus, Late Cretaceous (Campanian), Judith River Formation, Alberta, Canada, redrawn from Molnar et al. (1990). Abbreviations as in Text-figures 4 and 5, and: acc. op., accessory opening of unknown function in the premaxilla of Oviraptor (Barsbold et al. 1990); amf, anterior maxillary foramen; pn, pneumatic openings. Scale bars represent 50 mm (d-g) and 100 mm (a-c, h).
Figs 1 in New species of Polycentropodidae (Insecta: Trichoptera) from the Taymyr amber locality Nizhnyaya Agapa, upper Cenomanian
Figs 1. Map of Yantardakh and Nizhnyaya Agapa localities. Рис. 1. Карта местонахождений Янтардах и НижнЯЯ Агапа.
Figure 12 in Anatomy of the basal titanosaur (Dinosauria, Sauropoda) Andesaurus delgadoi from the mid-Cretaceous (Albian-early Cenomanian) Río Limay Formation, Neuquén Province, Argentina: implications for titanosaur systematics
Figure 12. Maps showing the distribution of titanosauriforms: (A) Late Jurassic, (B) Early Cretaceous, and (C) Late Cretaceous. Key: grey circles, non-titanosaur titanosauriforms; black triangles, titanosaurs; white hexagons, putative titanosaurs. See Table 7 for details. Images were produced in ArcGIS 9.2, and palaeomap reconstructions are from Scotese (2001) (note that the palaeomaps consist of the reconstructed positions of present-day continental coastlines). Modern day co-ordinates for titanosauriform taxa were converted to palaeolatitudes and palaeolongitudes (for the relevant time slices) using PointTracker (Scotese 2004).
Figure 10 in Anatomy of the basal titanosaur (Dinosauria, Sauropoda) Andesaurus delgadoi from the mid-Cretaceous (Albian-early Cenomanian) Río Limay Formation, Neuquén Province, Argentina: implications for titanosaur systematics
Figure 10. Andesaurus delgadoi. Photographs of metacarpals: right metacarpal I (Mc I) in (A) dorsal, (B) distal, and (C) ventral view; left metacarpal V (Mc V) in (D) dorsal, (E) ventral, and (F) proximal view. In each of the images in dorsal and ventral view, the proximal end of the metacarpal is at the bottom of the image. In the distal and proximal-end images, the dorsal surface is at the top of the image. Scale bar: 100 mm.
Figure 11 in Anatomy of the basal titanosaur (Dinosauria, Sauropoda) Andesaurus delgadoi from the mid-Cretaceous (Albian-early Cenomanian) Río Limay Formation, Neuquén Province, Argentina: implications for titanosaur systematics
Figure 11. Andesaurus delgadoi: photographs of left pubis and left ischium in lateral view. Scale bar: 400 mm.
Figure 8 in Anatomy of the basal titanosaur (Dinosauria, Sauropoda) Andesaurus delgadoi from the mid-Cretaceous (Albian-early Cenomanian) Río Limay Formation, Neuquén Province, Argentina: implications for titanosaur systematics
Figure 8. Andesaurus delgadoi. Photographs of chevrons: (A) chevron 1 (C1) in anterior and right lateral view; (B) chevron 2 (C2) in anterior and left lateral view; (C) chevron 3 (C3) in anterior and left lateral view; (D) chevron 4 (C4) in posterior and left lateral view. Scale bar: 200 mm.
Figure 7 in Anatomy of the basal titanosaur (Dinosauria, Sauropoda) Andesaurus delgadoi from the mid-Cretaceous (Albian-early Cenomanian) Río Limay Formation, Neuquén Province, Argentina: implications for titanosaur systematics
Figure 7. Andesaurus delgadoi. Photographs of middle-posterior caudal vertebrae: (A) Cd23 in left lateral view; (B) Cd24 in left lateral view; Cd25 in (C) anterior, (D) right lateral, and (E) posterior view. Scale bar: 100 mm.
Figure 6 in Anatomy of the basal titanosaur (Dinosauria, Sauropoda) Andesaurus delgadoi from the mid-Cretaceous (Albian-early Cenomanian) Río Limay Formation, Neuquén Province, Argentina: implications for titanosaur systematics
Figure 6. Andesaurus delgadoi. Photographs of anterior–middle caudal vertebrae: (A) Cd10 and Cd11 in left lateral view; (B) Cd12 in left lateral view; (C) Cd13 in left lateral view; (D) Cd15 in left lateral view; (E) Cd18 in left lateral view; (F) Cd19 in left lateral view; Cd20 in (G) anterior, (H) left lateral, and (I) posterior view. Abbreviations: cb, circular bulge; nc ridge, neurocentral ridge. Scale bar: 100 mm.
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