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1,301 results for “Early Cretaceous”
Fig. 1 in Anatomy of the Early Cretaceous enantiornithine bird Rapaxavis pani
Fig. 1. Photographs of enantiornithine bird Rapaxavis pani Morschhauser, Varricchio, Gao, Liu, Wang, Cheng, and Meng, 2009 from the Early Cretaceous Jiufotang Formation in northeastern China. A. DNHM D2522 (holotype), prior to preparation. B. DNHM D2522 after preparation.
Fig. 14 in Demandasaurus darwini, a new rebbachisaurid sauropod from the Early Cretaceous of the Iberian Peninsula
Fig. 14. Cladograms showing the phylogenetic position of Demandasaurus darwini gen. et sp. nov., strict consensus (A), 50% majority−rule consensus (B), and Adams consensus (C) of 35 equally parsimonious trees using 16 taxa and 102 unordered characters (see Sereno et al. 2007 and Appendix 1).
Fig. 10 in Demandasaurus darwini, a new rebbachisaurid sauropod from the Early Cretaceous of the Iberian Peninsula
Fig. 10. First caudal vertebra of rebbachisaurid sauropod Demandasaurus darwini gen. et sp. nov. from Late Barremian–Early Aptian, Early Cretaceous of Tenadas de los Vallejos II, Spain, MDS−RVII,605, in anterior (A) and posterior (B) views.
Fig. 8 in Demandasaurus darwini, a new rebbachisaurid sauropod from the Early Cretaceous of the Iberian Peninsula
Fig. 8. Posterior cervical rib of rebbachisaurid sauropod Demandasaurus darwini gen. et sp. nov. from Late Barremian–Early Aptian, Early Cretaceous of Tenadas de los Vallejos II, Spain, MDS−RVII,811 (associated to the cervical vertebra MDS−RVII,806), in dorsal (A), ventral (B), and medial (C) views.
Fig. 7 in Demandasaurus darwini, a new rebbachisaurid sauropod from the Early Cretaceous of the Iberian Peninsula
Fig. 7. Posterior cervical vertebra of rebbachisaurid sauropod Demandasaurus darwini gen. et sp. nov. from Late Barremian–Early Aptian, Early Cretaceous of Tenadas de los Vallejos II, Spain, MDS−RVII,806, in anterior (A) and left lateral (B) views. The arrow indicates a subtriangular surface located dorsally to the diapophysis.
Fig. 12 in Demandasaurus darwini, a new rebbachisaurid sauropod from the Early Cretaceous of the Iberian Peninsula
Fig. 12. Mid−posterior caudal vertebra of rebbachisaurid sauropod Demandasaurus darwini gen. et sp. nov. from Late Barremian–Early Aptian, Early Cretaceous of Tenadas de los Vallejos II, Spain, MDS−RVII,217, in left lateral (A), posterior (B), and schematic (C) views.
Fig. 6 in Demandasaurus darwini, a new rebbachisaurid sauropod from the Early Cretaceous of the Iberian Peninsula
Fig. 6. Anterior−middle cervical vertebra of rebbachisaurid sauropod Demandasaurus darwini gen. et sp. nov. from Late Barremian–Early Aptian, Early Cretaceous of Tenadas de los Vallejos II, Spain, MDS−RVII,589, in anterior (A), right lateral (B), dorsal (C), and posterior (D) views. Scale bars 10 cm.
Fig. 2 in Demandasaurus darwini, a new rebbachisaurid sauropod from the Early Cretaceous of the Iberian Peninsula
Fig. 2. Premaxilla of rebbachisaurid sauropod Demandasaurus darwini gen. et sp. nov. from Late Barremian–Early Aptian, Early Cretaceous of Tenadas de los Vallejos II, Spain. A. Right premaxilla MDS−RVII,275, in anterior (A1), posterior (A2) and medial (A3) views. B. Left premaxila MDS−RVII, 322, in anterior view. The arrow in A1 and A3 indicate a premaxillary tooth in anatomical position, and the arrow in B indicate the tooth MDS−RVII,436 attached to the rostral face of the left premaxila.
Fig. 5 in Demandasaurus darwini, a new rebbachisaurid sauropod from the Early Cretaceous of the Iberian Peninsula
Fig. 5. Axis of rebbachisaurid sauropod Demandasaurus darwini gen. et sp. nov. from Late Barremian–Early Aptian, Early Cretaceous of Tenadas de los Vallejos II, Spain, MDS−RVII,606, in lateral view. The arrow indicates a structure in the third cervical vertebra.
Fig. 13 in Demandasaurus darwini, a new rebbachisaurid sauropod from the Early Cretaceous of the Iberian Peninsula
Fig. 13. Haemal arches of rebbachisaurid sauropod Demandasaurus darwini gen. et sp. nov. from Late Barremian–Early Aptian, Early Cretaceous of Tenadas de los Vallejos II, Spain. A. MDS−RVII,590, in anterior (A1), posterior (A2), and lateral (A3) views. B. MDS−RVII,591, in anterior (B1) and lateral (B2) views. C. MDS−RVII,797, in anterior (C1) and lateral (C2) views. D. MDS−RVII,231, in anterior (D1), lateral (D2), and proximal (D3) views. E. MDS−RVII,594, in anterior (E1), posterior (E2), and lateral (E3) views. Scale bars 10 cm.
Fig. 11 in Demandasaurus darwini, a new rebbachisaurid sauropod from the Early Cretaceous of the Iberian Peninsula
Fig. 11. Anterior caudal vertebra of rebbachisaurid sauropod Demandasaurus darwini gen. et sp. nov. from Late Barremian–Early Aptian, Early Cretaceous of Tenadas de los Vallejos II, Spain, MDS−RVII,610, in anterior (A), lateral (B), and posterior (C) views. The neural spine is incomplete.
Fig. 4 in Demandasaurus darwini, a new rebbachisaurid sauropod from the Early Cretaceous of the Iberian Peninsula
Fig. 4. Tooth of rebbachisaurid sauropod Demandasaurus darwini gen. et sp. nov. from Late Barremian–Early Aptian, Early Cretaceous of Tenadas de los Vallejos II, Spain. A. MDS−RVII,438, in lingual (A1) and basal (A2) views. B. Detail of the ornamentation of the tooth MDS−RVII,437, in lingual view. The arrows indicate the mesial and distal carinae. Scale bars 5 mm.
Fig. 3 in Demandasaurus darwini, a new rebbachisaurid sauropod from the Early Cretaceous of the Iberian Peninsula
Fig. 3. Left dentary of rebbachisaurid sauropod Demandasaurus darwini gen. et sp. nov. from Late Barremian–Early Aptian, Early Cretaceous of Tenadas de los Vallejos II, Spain, MDS−RVII,443, in lateral (A) and dorsal (B) views. The arrow indicates a depressed area in a dorsolateral position.
Fig. 3 in Gradual evolution of the Early Cretaceous marine gastropod Rissoina lineage in central Poland
Fig. 3. Rissoina (Buvignieria) sp. from the Wąwał section. A. ZPAL Ga.9/44, sample A5, lateral (A1) and apical (A2) views respectively. B. ZPAL Ga.9/46, sample C2, lateral (B1) and apical (B2) views respectively. C. ZPAL Ga.9/52, sample C1, lateral view. D. ZPAL Ga.9/48, sample I1, lateral (D1) and apical (D2) views respectively. E. ZPAL Ga.9/49, sample M1, lateral view. F. ZPAL Ga.9/54, sample F2, lateral view of the protoconch. G. ZPAL Ga.9/43, sample L1, close−up of the protoconch 1. H. ZPAL Ga.9/53, sample C1, apical view. Black arrow shows the demarcation between protoconch 1 and 2, white arrows show the demarcation between protoconch and teleoconch.
Fig. 2 in Gradual evolution of the Early Cretaceous marine gastropod Rissoina lineage in central Poland
Fig. 2. Temporal changes of Rissoina (Buvignieria) sp. in the Wąwał section. The mean value, standard deviation, p of Kolmogorov−Smirnov D statistic, and observed range for diameter at the first whorl of the teleoconch (D), whorl height between abapical and adapical suture at the end of the first whorl of teleoconch (SH), shoulder angle (SA), and apical angle (A). Note that in the lower part of the section where the environment is unstable only the ecophenotypic parameters (D and SH) change whereas the parameters SA and A, both signals of morphological changes start to evolve after the environment stabilizes. The Kolmogorov−Smirnov D statistic counted with PAST software (Hammer et al. 2001) gives roughly the same results.
Fig.1 in Early Cretaceous "symmetrodont" mammal Gobiotheriodon from Mongolia and the classification of "Symmetrodonta"
Fig.1. Gobiotheriodon infinitus (Trofimov, 1980).PIN 3101/80, holotype, right dentary with m2–4 in lingual (A), labial (B), and occlusal (C) views. Höövör (Khoboor), Mongolia; Early Cretaceous, Aptian or Albian. Scale bar 1 mm.
Fig.2. A in Early Cretaceous "symmetrodont" mammal Gobiotheriodon from Mongolia and the classification of "Symmetrodonta"
Fig.2. A.Cf. Gobiconodon sp., PIN 3101/81, right maxillary fragment in occlusal view, with M3?, and alveoli for M2? and M4–5? (A1); enlarged M3? of the same in occlusal view (A2); the same in anterior view (A3). B. Gobiotheriodon infinitus (Trofimov, 1980), PIN 3101/80, holotype, right dentary fragment with m2−m4 in occlusal view (B1); the same in lingual and slightly posterior view (B2).All SEM micrographs, A 1, A2 and B1, stereopairs.All from Early Cretaceous (Aptian or Albian) at Höövör (Khoboor) in Mongolia. Scale bars 1 mm.
FIGURE 16. Shiramine Morphotype B, right mandible SBEI 827. 1–2 in An assemblage of lizards from the Early Cretaceous of Japan
FIGURE 16. Shiramine Morphotype B, right mandible SBEI 827. 1–2, dentary in labial view; 3–4, dentary and associated splenial in lingual view; 5–11, postdentary bones in 5–6 dorsomedial view; 7, ventral view; 8, dorsal view; 9, medial view; and 10, posterior view of articular surface. For abbreviations, see Material and Methods.
FIGURE 17 in An assemblage of lizards from the Early Cretaceous of Japan
FIGURE 17. Comparison of Shiramine Morphotype B and Myrmecodaptria microphagosa (Gao and Norell, 2000) from the Late Cretaceous of Mongolia. 1-2, left lateral and dorsal views respectively of the skull of Myrmecodaptria microphagosa, redrawn from Gao and Norell (2000). Scale bar equals 5mm; 3, dentary of morphotype B, SBEI 827, labial view; 4, isolated left maxilla, SBEI 2407, in labial view; 5, isolated median frontal, SBEI 1803, in dorsal view.
FIGURE 12 in An assemblage of lizards from the Early Cretaceous of Japan
FIGURE 12. The phylogenetic position of Asagaolacerta tricuspidens gen. et sp. nov. tested using different analytical protocols within TNT. 1, detail of Strict Consensus of 1000 trees using the protocol that yielded the tree in Figure 5.1, node support values Bremer/Jacknife/Symmetric sampling; 2, one of three trees resulting from an analysis using with the molecular backbone constraint tree, but no character ordering or weighting; 3, one of 58 trees from an analysis run as in (2), but with character ordering as per Gauthier et al. (2012) and Longrich et al. (2012), and Implied Weighting (k=7); 4, one of 34 trees from an analysis run as in (3), but without the molecular backbone constraint; 5, 70% MRT of 19 trees resulting from an analysis (characters ordered but equally weighted, no constraints) run using only the boreoteiioid taxa, with Gekko gecko as the outgroup taxon. The 70%MRT is presented rather than the unresolved Strict Consensus to show that Asagaolacerta tricuspidens is usually (88% of trees) placed in the basal position (see text for further discussion). Abbreviation: poly, polyglyphanodont (as used in Longrich et al., 2012).
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