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1,301 results for “Early Cretaceous”
Figure 4 in Revision of the enigmatic crocodyliform Elosuchus felixi de Lapparent de Broin, 2002 from the Lower-Upper Cretaceous boundary of Niger: potential evidence for an early origin of the clade Dyrosauridae
Figure 4. Dorsal view of the partial lower jaw MNHN.F INA 25, the holotype of Fortignathus felixi (de Lapparent de Broin, 2002) comb. nov.: A, photograph; B, illustrative sketch. Abbreviations: d1–d19, dentary alveoli from positions 1 to 19; m?, maxillary tooth enamel; sp, splenial.
Figure 6 in Revision of the enigmatic crocodyliform Elosuchus felixi de Lapparent de Broin, 2002 from the Lower-Upper Cretaceous boundary of Niger: potential evidence for an early origin of the clade Dyrosauridae
Figure 6. Ventral view of the partial lower jaw MNHN.F INA 25, the holotype of Fortignathus felixi (de Lapparent de Broin) comb. nov.: A, photograph; B, illustrative sketch. Abbreviations: d, dentary; sp, splenial.
Figure 2 in Revision of the enigmatic crocodyliform Elosuchus felixi de Lapparent de Broin, 2002 from the Lower-Upper Cretaceous boundary of Niger: potential evidence for an early origin of the clade Dyrosauridae
Figure 2. Osteoderms assigned to Crocodyliformes indeterminate (formerly Elosuchus felixi de Lapparent de Broin, 2002): A, MNHN.F INA 38 in dorsal view; B, MNHN.F INA 38 in ventral view; C, MNHN.F INA 40 in dorsal view; D, MNHN.F INA 41 in dorsal view.
Figure 3. Premaxilla MNHN.F INA 30 in Revision of the enigmatic crocodyliform Elosuchus felixi de Lapparent de Broin, 2002 from the Lower-Upper Cretaceous boundary of Niger: potential evidence for an early origin of the clade Dyrosauridae
Figure 3. Premaxilla MNHN.F INA 30, referred to Elosuchus sp.: A, photograph in dorsal view; B, photograph in ventral view.
Figure 5. Partial lower jaw MNHN.F INA 25 in Revision of the enigmatic crocodyliform Elosuchus felixi de Lapparent de Broin, 2002 from the Lower-Upper Cretaceous boundary of Niger: potential evidence for an early origin of the clade Dyrosauridae
Figure 5. Partial lower jaw MNHN.F INA 25, the holotype of Fortignathus felixi (de Lapparent de Broin, 2002) comb. nov.: A, B, photograph and illustrative sketch in left lateral view; C, D, photograph and illustrative sketch in medial view. Abbreviations: d1–d19, dentary alveoli from positions 1 to 19; m?, maxillary tooth enamel; sp, splenial.
Figure 1 in Revision of the enigmatic crocodyliform Elosuchus felixi de Lapparent de Broin, 2002 from the Lower-Upper Cretaceous boundary of Niger: potential evidence for an early origin of the clade Dyrosauridae
Figure 1. Geological map of the In Abangharit region of Niger, western Africa. The fossils described here come from the Echkar Formation, to the west of In Abangharit. Abbreviations: Alb, Albian; Bar, Barremian; Cen, Cenomanian; L. Cre, Lower Cretaceous; M. Jur, Middle Jurassic; Trias, Triassic; Tur, Turonian; U., Upper.
Figure 1 in Systematic revision of Sarcosuchus hartti (Crocodyliformes) from the Recôncavo Basin (Early Cretaceous) of Bahia, north-eastern Brazil
Figure 1. Map showing the fossil localities of Sarcosuchus hartii. A, Brazil (light grey) and Bahia State (red). B, Recôncavo baiano region. Red dots show the localities where the studied fossil were collected: 1, Fort Mont Serrat (BMNH R 3079); 2, Plataforma (BMNH R 3079); 3, Itacaranha (BMNH R 3079); 4, Setúbal (BMNH R 3224, BMNH R 3423); 5, Aratu (MN 7459-V, MN 7460-V, MN 7461-V). The black box delimitates the area in B where light grey represents the landmasses and white the sea. Scale bar: 6 km.
Figure 9. Consensus cladogram resulted from 12 minimum-length trees with 1287 in Systematic revision of Sarcosuchus hartti (Crocodyliformes) from the Recôncavo Basin (Early Cretaceous) of Bahia, north-eastern Brazil
Figure 9. Consensus cladogram resulted from 12 minimum-length trees with 1287 steps (CI: 0.327 and RI: 0.610). The numbered nodes are the following clades: 1, Neosuchia; 2, Susisuchidae; 3, Eusuchia; 4, Allodaposuchidae; 5, Crocodylia; 6, Coelognathosuchia; 7, Goniopholididae; 8, Tethysuchia; 9, Pholidosauridae; 10, Tethysuchoidea; 11, Dyrosauridae.
Figure 4 in Systematic revision of Sarcosuchus hartti (Crocodyliformes) from the Recôncavo Basin (Early Cretaceous) of Bahia, north-eastern Brazil
Figure 4. Sarcosuchus hartti, teeth in detail. The enamel structures are shown in the red boxes. A, YPM 516, Lectotype, in mesial view. B, MN 7460-V, in distal (?) view. C, BMNH R3079, in distal (?) view. D, MN 7461-V, in distal (?) view. Scale bar: 1 cm.
Figure 3. Sarcosuchus hartti, teeth. A, YPM 516 in Systematic revision of Sarcosuchus hartti (Crocodyliformes) from the Recôncavo Basin (Early Cretaceous) of Bahia, north-eastern Brazil
Figure 3. Sarcosuchus hartti, teeth. A, YPM 516, Lectotype, in mesial view. B, BMNH R2983, in mesial (?) view. C, BMNH R2983, in distal (?) view. D, BMNH R3079, in mesial (?) view. E, BMNH R3079, in distal (?) view. F, MN 7460-V, in distal (?) view. G, MN 7460-V, in apical view. H, MN 7461-V, in distal (?) view. I, MN 7461-V, in apical view. Scale bar: 1 cm.
Figure 2 in Systematic revision of Sarcosuchus hartti (Crocodyliformes) from the Recôncavo Basin (Early Cretaceous) of Bahia, north-eastern Brazil
Figure 2. Aratu locality (Bahia) in the 1970s. A, an unspecified view of Aratu Bay. B, fossil fragments. C, outcrops (left) and Aratu bay at the horizon (right corner). D, an unspecified outcrop of the Recôncavo Basin. All pictures by Roberto Tinoco.
Figure 8 in Systematic revision of Sarcosuchus hartti (Crocodyliformes) from the Recôncavo Basin (Early Cretaceous) of Bahia, north-eastern Brazil
Figure 8. Sarcosuchus sp., osteoderm (BMNH R3224). A, dorsal view. B, ventral view. Abbreviations: art, articular facet; ap, anterior projection; op, ornamentation pit; vcb, ventral compact bone tissue; meb, medial spongiest bone tissue; dcb, dorsal compact bone tissue. Scale bar: 3 cm.
Figure 11 in Systematic revision of Sarcosuchus hartti (Crocodyliformes) from the Recôncavo Basin (Early Cretaceous) of Bahia, north-eastern Brazil
Figure 11. Detail of the Tethysuchia clade and their sister-clade from the consensus cladogram. The two phylogenetic hypotheses that originated the polytomy in the consensus cladogram: A, hypothesis two: Sunosuchus shartegensis, Calsoyasuchus, Sunosuchus miaoi, Siamosuchus phuphokensis and Chalawan thailandicus as a clade sister to Tethysuchia. B, hypothesis one: Sunosuchus shartegensis and Calsoyasuchus as sister-group of Tethysuchia.
Figure 6 in Systematic revision of Sarcosuchus hartti (Crocodyliformes) from the Recôncavo Basin (Early Cretaceous) of Bahia, north-eastern Brazil
Figure 6. Sarcosuchus hartti, schematic drawing of the mandible (BMNH R 3423). A, left lateral view. B, ventral view. C, anterior view. D, dorsal view. Abbreviations: 1st, first dentary alveolus; 4th, fourth dentary alveolus; pte, preserved teeth; 11th, eleventh dentary alveolus; 16th, sixteenth dentary alveolus; 22nd, twenty-second dentary alveolus; d-spl, suture between dentary and splenial. Scale bar: 10 cm.
Figure 10 in Systematic revision of Sarcosuchus hartti (Crocodyliformes) from the Recôncavo Basin (Early Cretaceous) of Bahia, north-eastern Brazil
Figure 10. Schematic drawings of the anterior end of the mandible in selected pholidosaurids. All drawings in dorsal view. A, Sarcosuchus hartti (BMNH R3423). B, Sarcosuchus imperator from Buffetaut & Taquet (1977). C, PRC102-143 referred to C. thailandicus from Martin et al. (2013). D, Sunosuchus phuwiangensis from Buffetaut & Ingavat (1983). E, Pholidosaurus purbeckensis from Martin et al. (2016). F, Elosuchus cherifiensis from de Broin (2002). G, Fortignathus felixi from Young et al. (2017). H, CAS42-20 holotype of Chalawan thailandicus from Buffetaut & Ingavat (1984). I, Turanosuchus aralensis from Halliday et al. (2015). Not to scale.
Figure 13. Strict consensus cladograms from the modified Young matrix analyses. A, results from the analysis using all 104 in Revision of the enigmatic crocodyliform Elosuchus felixi de Lapparent de Broin, 2002 from the Lower-Upper Cretaceous boundary of Niger: potential evidence for an early origin of the clade Dyrosauridae
Figure 13. Strict consensus cladograms from the modified Young matrix analyses. A, results from the analysis using all 104 operational taxonomic units (OTUs). B, subset of results from the analysis excluding Fortignathus felixi (de Lapparent de Broin, 2002) comb. nov., showing the only differences with the 104 OUT analyses (i.e. in the resolution of Dyrosauridae, Pholidosauridae and Crocodylia). Bootstrap values are shown above the relevant nodes. C, subset of results from the analysis excluding F. felixi comb. nov. and Pholidosaurus schaumbergensis von Meyer, 1841, showing the differences with the 104 OUT analysis alone (i.e. in the resolution of Dyrosauridae and Pholidosauridae). Abbreviations: CI, ensemble consistency index; RI, ensemble retention index; RC, rescaled consistency index; HI, ensemble homoplasy index.
Figure 12 in Revision of the enigmatic crocodyliform Elosuchus felixi de Lapparent de Broin, 2002 from the Lower-Upper Cretaceous boundary of Niger: potential evidence for an early origin of the clade Dyrosauridae
Figure 12. Strict consensus cladograms from the modified Hasting matrix analyses: A, results from the analysis using all 37 operational taxonomic units (OTUs); B, subset of results from the analysis excluding Fortignathus felixi (de Lapparent de Broin, 2002) comb. nov., showing just the differences between the analyses (i.e. in the resolution of Dyrosauridae). Bootstrap values are shown above the relevant nodes. Abbreviations: CI, ensemble consistency index; RI, ensemble retention index; RC, rescaled consistency index; HI, ensemble homoplasy index.
FIGURE 3 in Termite coprolites (Blattodea: Isoptera) from the Early Cretaceous of eastern Inner Mongolia, Northeast China
FIGURE 3. SEM images of moderate and large lignite termite coprolites from the Lower Cretaceous Huolinhe Formation showing their morphology.
FIGURE 5 in Termite coprolites (Blattodea: Isoptera) from the Early Cretaceous of eastern Inner Mongolia, Northeast China
FIGURE 5. Light micrographs (A‒F) and scanning electron micrographs (G‒N) of wood debris macerated from the lignite coprolites collected from the Lower Cretaceous Huolinhe Formation. A, Wood debris showing a bundle of fibres. B, Wood debris in radial section showing tracheid with separate uniseriate pits. C, Wood debris in radial section showing uniseriate tracheid pits. D, Wood debris in radial section showing tracheid. E, Wood-debris in radial section showing cross-field pits. F, Wood debris of radial section of structureless. G, Wood debris in radial section showing tracheid with uniserial tracheid bordered pits. H‒I, Wood debris in radial section showing cross-field pits with homogenized cell walls. J, Wood debris in radial section showing uniseriate xylem rays. K, Wood debris in radial section showing tracheid with homogenized cell walls. L, Fragmented secondary wood. M, Wood debris of tracheid with homogenized cell walls. N, Wood debris in radial section showing uniseriate xylem rays.
FIGURE 2 in Termite coprolites (Blattodea: Isoptera) from the Early Cretaceous of eastern Inner Mongolia, Northeast China
FIGURE 2. SEM images of small lignite termite coprolites from the Lower Cretaceous Huolinhe Formation showing their morphology.
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