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107 results for “Wealden”
Figure 4 in A new hadrosauriform dinosaur from the Wessex Formation, Wealden Group (Early Cretaceous), of the Isle of Wight, southern England
Figure 4. Brighstoneus simmondsi gen. et sp. nov. (MIWG 6344), left maxilla in A, lateral, B, dorsal, C, medial and D, ventral views. Abbreviations: adp, anterodorsal process; aod, antorbital depression; ap, ascending process; avp, anteroventral process; eps, ectopterygoid shelf; frag, fragment of bone, probably erroneously placed; jp, jugal process; ms, medial shelf; pmg, premaxillary groove; sf, special foramina. Scale bar ¼ 100 mm.
Figure 1. A in A new hadrosauriform dinosaur from the Wessex Formation, Wealden Group (Early Cretaceous), of the Isle of Wight, southern England
Figure 1. A, the south coast of England; B, an enlarged view of the Isle of Wight (scale bar ¼ 5 km). Arrow labelled MIWG 6344 marks the locality of the Brighstoneus simmondsi gen. et sp. nov. excavation site.
Text-fig. 1. Map of the Isle of Wight with the distribution of the Wealden Group exposed on the south-western and south-eastern coast, showing the fossil localities mentioned in the text (in bold). in First Record Of Intact Equisetalean Strobili From The Wealden (Lower Cretaceous) Of The Isle Of Wight, Southern England
Text-fig. 1. Map of the Isle of Wight with the distribution of the Wealden Group exposed on the south-western and south-eastern coast, showing the fossil localities mentioned in the text (in bold).
Text-fig. 2. Strobili of modern Equisetum hyemale L. in different stages of expansion/maturation. Living specimens from near Billerbeck in Westphalia, Germany. Scale bars 5 mm. in First Record Of Intact Equisetalean Strobili From The Wealden (Lower Cretaceous) Of The Isle Of Wight, Southern England
Text-fig. 2. Strobili of modern Equisetum hyemale L. in different stages of expansion/maturation. Living specimens from near Billerbeck in Westphalia, Germany. Scale bars 5 mm.
Fig. 4 in A new bernissartiid crocodyliform from the Lower Cretaceous Wessex Formation (Wealden Group, Barremian) of the Isle of Wight, southern England
Fig. 4. Simplified cladogram showing the phylogenetic placement of Koumpiodontosuchus aprosdokiti gen. et sp. nov. (IWCMS2012.203/4) from the Barremian Wessex Formation of the Isle of Wight, UK, and Bernissartiidae (asterisk), based on the results of the implied weighting analysis. For explanation see the text and data provided in the SOM (available at http://app.pan.pl/SOM/app60-Sweetman_etal_SOM.pdf).
Fig. 5. A in A new bernissartiid crocodyliform from the Lower Cretaceous Wessex Formation (Wealden Group, Barremian) of the Isle of Wight, southern England
Fig. 5. A reconstruction of Koumpiodontosuchus aprosdokiti gen. et sp. nov. feeding on the viviparid gastropod Viviparous cariniferous Sowerby, 1826 (in Sowerby 1826–29). Smaller gastropods shown include Prophysa sp. Illustration by Mark Witton.
Fig. 3 in A new bernissartiid crocodyliform from the Lower Cretaceous Wessex Formation (Wealden Group, Barremian) of the Isle of Wight, southern England
Fig. 3. Bernissartiid crocodyliform Koumpiodontosuchus aprosdokiti gen. et sp. nov. from the Barremian Wessex Formation of the Isle of Wight, UK. Holotype specimen IWCMS 2012.203–204, in dorsal (A), occipital (B), ventral (C), and left lateral (D) views. Photographs (A –D), schematic repre1 1 sentations to show anatomical features including sutures between bones (A 2 –D 2). "?" in B 2 denotes an indeterminate bone fragment adhering to the left lateral margin of the foramen magnum.
Fig. 2 in A new bernissartiid crocodyliform from the Lower Cretaceous Wessex Formation (Wealden Group, Barremian) of the Isle of Wight, southern England
Fig. 2. Schematic lithological log of the upper part of the Wessex Formation exposed in the cliff and on the foreshore in the vicinity of Yaverland on the south east coast of the Isle of Wight. Modified from Radley (1994) with additional data.
Figure 24 in A new hadrosauriform dinosaur from the Wessex Formation, Wealden Group (Early Cretaceous), of the Isle of Wight, southern England
Figure 24. Brighstoneus simmondsi. gen. et sp. nov. Life restoration by John Sibbick.
FIGURE 10 in A taxonomy of iguanodontians (Dinosauria: Ornithopoda) from the lower Wealden Group (Cretaceous: Valanginian) of southern England
FIGURE 10. Hypselospinus fittoni (Lydekker, 1889) comb. nov. Referred material. NHMUK R1831, right dentary. A. Medial view, reproduced from Owen (1874: pl.1, fig. 1). B. Medial view, sketch drawing taken from the original dentary (December 2009). C. The 'Brickenden jaw' (NHMUK 28660). Sketch (November 2009) in medial view for comparison with NHMUK R1831 (above). This is the right dentary of a large iguanodontian of robust build (attribution unconfirmed at present but it may prove to be attributable to B. dawsoni – Norman in preparation) collected by Col. Brickenden from a quarry near Cuckfield, Sussex. Abbreviations: am – level of alveolar margin; at – 'anomalous tooth' (no longer associated with the jaw); br – extensively broken and crushed dorsal portion of the dentary ramus; ds – dentary-dentary symphysis; m – matrix infill of the Meckelian canal, the medial surface of the postdentary bones and the alveoli; mgr – Meckel's groove; mt – matrix and tooth crown removed since the lithograph was prepared; pr – 'prong' at the anterior end of the dentary ramus that locks against the lateral surface of the median ventral flap of the predentary; sh. alv – large area of the posterior alveolar shelf that has been sheared away post-mortem.
FIGURE 9 in A taxonomy of iguanodontians (Dinosauria: Ornithopoda) from the lower Wealden Group (Cretaceous: Valanginian) of southern England
FIGURE 9. Hypselospinus fittoni (Lydekker, 1889) comb. nov. NHMUK R604, referred specimen. A, B. Anterior–mid dorsal vertebra in left lateral and anterior views respectively. C. Anterior caudal vertebra in left lateral view. Abbreviations: cr – caudal rib; dia – diapophysis; em – everted articular margin of the centrum; hf –haemal arch (chevron) facet; par – parapophysis; poz – postzygapophysis; prz – prezygapophysis.
FIGURE 7 in A taxonomy of iguanodontians (Dinosauria: Ornithopoda) from the lower Wealden Group (Cretaceous: Valanginian) of southern England
FIGURE 7. Hypselospinus fittoni (Lydekker, 1889) comb. nov. NHMUK R1148, referred specimen. The right femur, illustrated as part of the holotype of Iguanodon hollingtoniensis Lydekker, 1889. A. Anterior view. B. Anteromedial view. Abbreviations: aig – anterior intercondylar groove almost occluded by shoulders developed from the distal articular condyles; at – anterior trochanter; 4t – fourth trochanter and associated muscles scars associated with the caudifemoral complex. Broken surfaces are indicated by cross-hatching.
FIGURE 4 in A taxonomy of iguanodontians (Dinosauria: Ornithopoda) from the lower Wealden Group (Cretaceous: Valanginian) of southern England
FIGURE 4. Barilium dawsoni (Lydekker, 1888) comb. nov. Some further examples of the holotype partial skeleton. A. Middle dorsal vertebra, NHMUK R798. B. Posterior dorsal vertebra, NHMUK R805. C, D. Proximal caudal vertebra, NHMUK R805 (in lateral and anterior views respectively). Broken surfaces indicated by cross-hatching.
FIGURE 2. Iguanodon anglicus Holl, 1829. NHMUK 2392 in A taxonomy of iguanodontians (Dinosauria: Ornithopoda) from the lower Wealden Group (Cretaceous: Valanginian) of southern England
FIGURE 2. Iguanodon anglicus Holl, 1829. NHMUK 2392. The lectotype tooth of Iguanodon anglicum Holl, 1829.
FIGURE 5 in A taxonomy of iguanodontians (Dinosauria: Ornithopoda) from the lower Wealden Group (Cretaceous: Valanginian) of southern England
FIGURE 5. Hypselospinus fittoni (Lydekker, 1889) comb. nov. NHMUK R1635, holotype ilium. A. Lateral view. B. Posterior view to show the inflected shelf, lateral ridge and brevis fossa. C. Medial view showing the form of the sacral rib scars. D. Dorsal view showing the transversely narrow dorsal margin of the ilium compared with that of B. dawsoni (Fig. 3B). The mediodorsal edge of the ilium shows an abscess-like excavation that may be pathological in origin. Even though the dorsal margin is eroded laterally posterior to the ischial peduncle (cross-hatched area) there is little indication of a laterally everted edge. Abbreviations: acet – acetabulum; brf – brevis fossa; lr – lateral ridge that bounds the brevis fossa; nde – narrow dorsal edge to the iliac blade; path? – probable pathological structure; prp – preacetabular process; srs – sacral rib scar on medial surface of iliac blade. Broken surfaces indicated by cross-hatching.
FIGURE 6 in A taxonomy of iguanodontians (Dinosauria: Ornithopoda) from the lower Wealden Group (Cretaceous: Valanginian) of southern England
FIGURE 6. Hypselospinus fittoni (Lydekker, 1889) comb. nov. NHMUK R1635, additional postcranial remains recovered from the same locality and horizon as the holotype ilium (Fig. 5) at Shornden. A–C. Posterior portion of sacrum (lateral, ventral and dorsal views respectively). D, E. Anterior caudal centrum, in right lateral and anterior views respectively. F. Proximal left ischium, a water-rolled and polished fragment. The ischium is of different preservation and is very probably transported to a greater extent than the other type specimens – and in any case shows no diagnostic features beyond being the proximal fragment of an ornithopod ischium. Abbreviations: cr – caudal rib; hf – haemal arch (chevron) facet; il – base of iliac peduncle; k – keel on ventral surface of sacral centrum; nc – floor of canal for spinal cord; obt – base of obturator process; pu – base of pubic peduncle; sr – fragments of the sacral ribs. Broken surfaces indicated by cross-hatching.
FIGURE 8 in A taxonomy of iguanodontians (Dinosauria: Ornithopoda) from the lower Wealden Group (Cretaceous: Valanginian) of southern England
FIGURE 8. Hypselospinus fittoni (Lydekker, 1889) comb. nov. Referred material. NHMUK R811, crushed sacrum (part of the holotype of Iguanodon hollingtoniensis) in ventral (A; note remains of midline keel is preserved despite crushing) and dorsal (B) views. NHMUK R811b, crushed ilium (part of the holotype of I. hollingtoniensis) in lateral (C) and medial (D) views. Note the deep, narrow preacetabular process with a low curved medial ridge, the flat iliac blade with a narrow dorsal edge and that the ventral postacetabular margin is indented and curves upward away from the ischial peduncle. Abbreviations: k – keel on ventral surface of the sacrum; mr – low, curved ridge on the medial surface of the preacetabular process; nc – floor of canal for the spinal cord; nde – narrow dorsal edge to the ilium; prp – preacetabular process; sr – fragments of the sacral ribs. Broken surfaces indicated by cross-hatching.
FIGURE 3 in A taxonomy of iguanodontians (Dinosauria: Ornithopoda) from the lower Wealden Group (Cretaceous: Valanginian) of southern England
FIGURE 3. Barilium dawsoni (Lydekker, 1888) comb. nov. NHMUK R802, holotype ilium in lateral (A), dorsal (B), and medial (C) views. Abbreviations: acet – acetabulum; ip – ischial peduncle; pp – pubic peduncle; prp – preacetabular process; srf – sacral rib facet; srs – posterior sacral rib scar. Broken surfaces indicated by cross-hatching.
FIGURE 4 in A new basal iguanodont (Dinosauria: Ornithischia) from the Wealden (Lower Cretaceous) of England
FIGURE 4. Right dentary tooth crown of NHMUK 28660 (removed from alveolus) in lingual view. Abbreviations: mar, mesial accessory ridge; mde, marginal denticle; prr, primary ridge; sr, secondary ridge. Scale bar equals 10 mm.
FIGURE 1 in A new basal iguanodont (Dinosauria: Ornithischia) from the Wealden (Lower Cretaceous) of England
FIGURE 1. Dentaries of basal iguanodonts from the Wadhurst Clay Formation. Left dentary of NHMUK R1834, referred herein to Barilium dawsoni, in lateral (A) view; right dentary NHMUK R1831 in lateral (B) view. Scale bars equal 10 cm.
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