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1,301 results for “Early Cretaceous”
Fig. 1 in Unusual theropod eggshells from the Early Cretaceous Blesa Formation of the Iberian Range, Spain
Fig. 1. Geographical and geological location of the site of La Cantalera 1 (early Barremian, Teruel, Spain), modified from Canudo et al. (2010). A. Simplified geological map of the Iberian Peninsula. B. Palaeogeographic subbasins (Ol, Oliete; Pa, Las Parras; Ga, Galve; Mo, Morella; Pe, Perelló; Sa, Salzedella; Pg, Peñagolosa) within the Maestrazgo Basin and active faults during Early Cretaceous sedimentation, modified from Salas et al. (2001). C. Detailed location of the La Cantalera site near the village of Josa, Teruel. D. Geological map of the La Cantalera area with the local geological units.
Fig. 3 in Unusual theropod eggshells from the Early Cretaceous Blesa Formation of the Iberian Range, Spain
Fig. 3. Thin-sections of prismatoolithid therapod eggshell Trigonoolithus amoae oogen. et oosp. nov. from La Cantalera 1 site, Early Barremian. A. MPZ 2012/856, light microphotograph. B. MPZ 2012/862, light microphotograph (B 1), microphotograph showing eggshell under cross-polars (B 2). C. MPZ2012/850, cathodoluminescence image showing dark blue luminescence except for some orange tones in the mammillary layer, probably due to the high amount of organic matter in this area. Scale bars 500 μm.
Fig. 2 in Juvenile-only clusters and behaviour of the Early Cretaceous dinosaur Psittacosaurus
Fig. 2. Cluster of six juvenile ceratopsian dinosaurs Psittacosaurus (IVPP V14341) from the Early Cretaceous of Lujiatun, Liaoning Province, China. The specimen, illustrated as a photograph (A) and interpretive drawing (B), shows six aligned juvenile specimens, of which specimens 2–6 are estimated to have been two years old at death, and specimen 1 was three years old, based on bone histological analysis.
Fig. 1 in Juvenile-only clusters and behaviour of the Early Cretaceous dinosaur Psittacosaurus
Fig. 1. Isometric growth in Psittacosaurus lujiatunensis. Skull length (y-axis) increases linearly with estimated age, in years (x-axis). The plot is based on measurements of 13 specimens (see SOM).
Fig. 3 in Juvenile-only clusters and behaviour of the Early Cretaceous dinosaur Psittacosaurus
Fig. 3. Bone histological evidence for growth and age in ceratopsian dinosaur Psittacosaurus lujiatunensis Zhou, Gao, Fox, and Chen, 2006 from the Early Cretaceous of Lujiatun, Liaoning Province, China. Mid-diaphyseal transverse sections of fibulae: IVPP V14341.1 (A), IVPP V14341.2 (B), IVPP V14341.3 (C), IVPP V14341.4 (D), and IVPP V14341.5 (E); radius: IVPP V14341.6 (F). White arrows indicate lines of arrested growth (LAGs).
Fig. 12 in Filling the ceratosaur gap: A new ceratosaurian theropod from the Early Cretaceous of Spain
Fig. 12. Phylogenetic position of Camarillasaurus cirugedae gen. et sp. nov. among other Theropoda. A, B. Re-run of the Carrano and Sampson (2008) cladistic analysis, with addition of Limusaurus and Camarillasaurus, showing the 50% majority-rule tree (A) and strict consensus tree with bootstrap values over 50% (B). C, D. Re-run of the Carrano and Sampson (2008) cladistic analysis, with three taxa (Deltadromeus, Aucasaurus, Abelisaurus) pruned and with addition of Limusaurus and Camarillasaurus, showing the sole most parsimonious tree (C) and strict consensus tree with bootstrap values over 50% (D).
Fig. 9 in Filling the ceratosaur gap: A new ceratosaurian theropod from the Early Cretaceous of Spain
Fig. 9. Broken right scapulocoracoid of ceratosaurian theropod Camarillasaurus cirugedae nov. gen. et sp. from the Camarillas Formation of Camarillas, Soria Province, Spain. A. MPG-KPC23, in medial view. B. MPGKPC30, in medial (B 1), posterior (B 2), and anterior (B 3) views (sections at lines "1" and "2" respectively). An arrow points to ridges that might indicate a muscle insertion, or tooth marks. Scale bars 10 mm.
Fig. 6 in Filling the ceratosaur gap: A new ceratosaurian theropod from the Early Cretaceous of Spain
Fig. 6. Ceratosaurian theropod Camarillasaurus cirugedae gen. et sp. nov. from the Camarillas Formation of Camarillas, Soria Province, Spain, sacrum. A. MPG-KPC4, formed from two broken centra fused, in left lateral (A1) and anterior (A2) views. B. MPG-KPC3, formed from two broken centra fused, in right lateral (B1) and anterior (B2) views. C. MPG-KPC16, incomplete centrum, in lateral (C1) and anterior? (C2) views. D. MPG-KPC18, incomplete centrum, in articular surface ventral view. E. MPG-KPC4 and MPG-KPC3, lateral view. Scale bars A–D, 10 mm; E, 40 mm.
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. 5 in Filling the ceratosaur gap: A new ceratosaurian theropod from the Early Cretaceous of Spain
Fig. 5. Ceratosaurian theropod Camarillasaurus cirugedae gen. et sp. nov. from the Camarillas Formation of Camarillas, Soria Province, Spain, dorsal vertebrae. A. MPG-KPC20 in?posterior (A1) and?anterior (A2, A3) views; showing different structures described in text. B. MPG-KPC39 in right lateral (B1, B2), showing structures described in text and in anterior view (B3). C. MPG KPC21 in right lateral (C1) and posterior (C2) views. D. MPG-KPC17 in left lateral view. E. MPG-KPC51. Scale bars are A, C, D, E, 10 mm; B, 20 mm.
Fig. 11 in Filling the ceratosaur gap: A new ceratosaurian theropod from the Early Cretaceous of Spain
Fig. 11. Proximal portion of right tibia of ceratosaurian theropod Camarillasaurus cirugedae nov. gen. et sp. from the Camarillas Formation of Camarillas, Soria Province, Spain, MPG-KPC8, in lateral (A), medial (B), anterior (C), posterior (D), proximal (E), and distal (F) views; detail of the tibial foramen area, in lateral view (G). Scale bars 10 mm.
Fig. 4 in Filling the ceratosaur gap: A new ceratosaurian theropod from the Early Cretaceous of Spain
Fig. 4. Ceratosaurian theropod Camarillasaurus cirugedae gen. et sp. nov. from the Camarillas Formation of Camarillas, Soria Province, Spain. A. Presacral vertebra, MPG-KPC9, in anterior (A 1), left lateral (A 2), and posterior (A 3) views. B. Possible neural spine tips, MPG-KPC31, 32, 33, in?posterior (B 1) and transverse (B 2) views. C. Presacral rib MPG-KPC7, in ventral view (C 1) and detail of its proximal end (C 2). Dotted line in C 2 indicates original, restored outline. Scale bars: A, C 2, 10 mm; B, 20 mm; C 1, 100 mm.
Fig. 8 in Filling the ceratosaur gap: A new ceratosaurian theropod from the Early Cretaceous of Spain
Fig. 8. Chevrons of ceratosaurian theropod Camarillasaurus cirugedae gen. et sp. nov. from the Camarillas Formation of Camarillas, Soria Province, Spain. A. MPG-KPC6, distal section, in anterior view (A 1), anterior view with different features marked (A 2), left lateral view (A 3). B. MPG-KPC5, proximal section with haemal canal, in anterior (B 1), left lateral (B 2), posterior (B 3), and right lateral (B 4) views. Note that the processes are absent on the cranial side. Crests of ridges indicated by white dotted lines in A 2, B1, B3. Scale bars 10 mm.
Fig. 2 in Filling the ceratosaur gap: A new ceratosaurian theropod from the Early Cretaceous of Spain
Fig. 2. Ceratosaurian theropod Camarillasaurus cirugedae gen. et sp. nov. from the Camarillas Formation of Camarillas, Soria Province, Spain, tooth, MPG-KPC43, in labial-lateral (A, D), lateral (B, E), and cross-sectional (C, F) views. The different damaged areas are marked (D, E), in clear grey for a broken section, dark grey for the wear facets, and white, for the root marks that have dissolved the enamel. Scale bar 5 mm.
Fig. 10 in Filling the ceratosaur gap: A new ceratosaurian theropod from the Early Cretaceous of Spain
Fig. 10. Sternal plates of ceratosaurian theropod Camarillasaurus cirugedae gen. et sp. nov. from the Camarillas Formation of Camarillas, Soria Province, Spain. A. MPG-KPC2, right sternal plate, in lateral (A 1) and ventral (A 2) views. B. MPG-KPC1, left sternal plate, in lateral (B 1) and ventral (B 2) views. Scale bars are 10 mm. medial condyles. It is flanked laterally by the fibular crest which runs the length of the specimen (Fig. 11B–D). As the cnemial and fibular crests approach each other distally, they
Fig. 3 in Filling the ceratosaur gap: A new ceratosaurian theropod from the Early Cretaceous of Spain
Fig. 3. Ceratosaurian theropod Camarillasaurus cirugedae gen. et sp. nov. from the Camarillas Formation of Camarillas, Soria Province, Spain, cervical vertebra, MPG-KPC24, in right lateral (A),?posterior (B),?anterior (C), and ventral (D) views. Dotted line in A indicates outline of lateral process (parapophysis). Scale bar 5 mm.
Fig. 7 in Filling the ceratosaur gap: A new ceratosaurian theropod from the Early Cretaceous of Spain
Fig. 7. Ceratosaurian theropod Camarillasaurus cirugedae gen. et sp. nov. from the Camarillas Formation of Camarillas, Soria Province, Spain, caudal vertebrae: A. MPG-KPC19, in?anterior (A 1),?posterior (A 2), and lateral (A 3) views. B. MPG-KPC18, in?anterior (B 1), dorsal (B 2), and lateral (B 3) views. C. MPG-KPC15, in lateral view. D. MPG-KPC46, in?posterior-lateral view. E. MPG-KPC10, in left lateral (E 1) and right lateral (E 2) views. F. MPGKPC11, in left lateral (F 1) and posterior (F 2) views. G. MPG-KPC13, in left lateral view. H. MPG-KPC12, in left lateral (H 1) and posterior (H 2) views. I . MPG-KPC22, in?anterior view. Scale bars A 2, C–G, H2, 20 mm; A 1, H1, 10 mm.
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).
Fig. 3 in The oldest Brazilian snakes from the Cenomanian (early Late Cretaceous)
Fig. 3. Midtrunk vertebra of the snake cf. Seismophis septentrionalis sp. nov. (CPHNA-MA VT 1222), from the Cenomanian (early Late Cretaceous) of Falésia do Sismito, Cajual Island, Maranhão, northeastern Brazil. Photographs (A1–E1) and explanatory drawings (A2–E2), in anterior (A), posterior (B), lateral (C), dorsal (D), and ventral (E) views.
Fig. 10 in Ontogeny and autecology of an Early Cretaceous trigoniide bivalve from Neuquén Basin, Argentina
Fig. 10. Field pictures of Myophorella garatei Leanza, 1981 in life position at Bajada del Agrio, late Valanginian. A. Individual with anomalous costae. B. Two other individuals (B ), a detail of the one on the right (B ). Scale (chisel edge width) 10 mm.
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Annotated Behaviour and Observability Dataset (ABODe)
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