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617 results for “Early Jurassic”
Figure 4 in Osteology of Cryolophosaurus ellioti (Dinosauria: Theropoda) from the Early Jurassic of Antarctica and implications for early theropod evolution
Figure 4. Skull of Cryolophosaurus ellioti in right lateral aspect (A), and interpretive line drawing (B). Several articulated posterior cervical vertebrae are preserved on the same block, posterior to the skull, and are visible in ventral aspect (photo courtesy of J. Weinstein).
Figure 2 in Osteology of Cryolophosaurus ellioti (Dinosauria: Theropoda) from the Early Jurassic of Antarctica and implications for early theropod evolution
Figure 2. Detailed stratigraphy of the Fremouw, Falla and Hanson Formations in the Beardmore Glacier region. Several important vertebrate faunas are indicated. Rock unit legend abbreviations: carb, carbonaceous; cg, conglomorate; crs, coarse; Fm, Formation; med, medium; mdst, mudstone; sltst, siltstone; ss, sandstone.
Figure 3 in Osteology of Cryolophosaurus ellioti (Dinosauria: Theropoda) from the Early Jurassic of Antarctica and implications for early theropod evolution
Figure 3. Left maxilla of Cryolophosaurus ellioti in lateral (A), and medial (B), aspects. Right maxilla of Cryolophosaurus ellioti in lateral (C) aspect.
Figure 1 in Osteology of Cryolophosaurus ellioti (Dinosauria: Theropoda) from the Early Jurassic of Antarctica and implications for early theropod evolution
Figure 1. Generalized map of Antarctica (A), with inset maps showing the Central Transantarctic Mountains (B), and the Beardmore Glacier area where the Mount Kirkpatrick dinosaur site is located (C). D, generalized stratigraphy and age of rock units in the Beardmore Glacier area.
Figure 8 in Osteology of Cryolophosaurus ellioti (Dinosauria: Theropoda) from the Early Jurassic of Antarctica and implications for early theropod evolution
Figure 8. Portions of the left jugal, postorbital and squamosal of Cryolophosaurus ellioti in medial aspect (A), and interpretive line drawing (B). These elements have been split in half from the left side of the skull.
FIGURE 8. Block 2 in A new early diverging thalattosuchian (Crocodylomorpha) from the Early Jurassic (Pliensbachian) of Dorset, U.K. and implications for the origin and evolution of the group
FIGURE 8. Block 2 containing four dorsal vertebrae, the right ulna, and dorsal ribs and gastralia of Turnersuchus hingleyae gen. et sp. nov. (LYMPH 2021/45).
FIGURE 7 in A new early diverging thalattosuchian (Crocodylomorpha) from the Early Jurassic (Pliensbachian) of Dorset, U.K. and implications for the origin and evolution of the group
FIGURE 7. Cervical and dorsal vertebrae of Turnersuchus hingleyae gen. et sp. nov. (LYMPH 2021/45). A, digital model of vertebral series of the last five cervical vertebrae with cervical ribs in right lateral view; B, line interpretation of same (without the ribs); C, line interpretation of the first cervical vertebra of the series in anterior view; D, line interpretation of same in right lateral view; E, line interpretation of same in ventral view; F, digital model of vertebral series of the first five dorsal vertebrae with ribs in right lateral view; G, line interpretation of same (without the ribs); H, line interpretation of the second dorsal vertebra of the series in anterior view; I, line interpretation of same in right lateral view; J, line interpretation of same in ventral view. Abbreviations: aas, anterior articular surface; cr, cervical rib; dr1, first dorsal rib; dv1, first dorsal vertebra; dv2, second dorsal vertebra; dv3, third dorsal vertebra; dia, diapophysis; lcr, last cervical rib; lcv, last cervical vertebra; nsp, neural spine; pap, parapophysis; poz, postzygapophysis; prz, prezygapophysis; vk, ventral keel.
FIGURE 9 in A new early diverging thalattosuchian (Crocodylomorpha) from the Early Jurassic (Pliensbachian) of Dorset, U.K. and implications for the origin and evolution of the group
FIGURE 9. Caudal vertebrae of Turnersuchus hingleyae gen. et sp. nov. (LYMPH 2021/45). A, block 5 containing caudal vertebrae from a relatively posterior position in series; B, block 4 containing one complete and one partial caudal vertebra from a relatively anterior position in the series; C, pair of likely caudal centra; D, second pair of likely caudal centra.
FIGURE 6 in A new early diverging thalattosuchian (Crocodylomorpha) from the Early Jurassic (Pliensbachian) of Dorset, U.K. and implications for the origin and evolution of the group
FIGURE 6. Mandibular fragments of Turnersuchus hingleyae gen. et sp. nov. (LYMPH 2021/45). A, right anterior dentary fragment in dorsal view; B, medial view of the same; C, posterior left dentary fragment in lateral view; D medial view of the same; E, posterior left mandibular fragment in lateral view. Abbreviations: an, angular; D1–D5, second through fifth dentary alveoli and/or teeth; den, dentary; dg, dentary groove, g cor, groove for articulation of anterior process of coronoid; mf, Meckelian fossa; t, posterior dentary teeth.
FIGURE 5 in A new early diverging thalattosuchian (Crocodylomorpha) from the Early Jurassic (Pliensbachian) of Dorset, U.K. and implications for the origin and evolution of the group
FIGURE 5. Photograph and line interpretation of the posterior region of left mandibular ramus of Turnersuchus hingleyae gen. et sp. nov. (LYMPH 2021/45) exposed in ventral view. Abbreviations: an, angular; art, articular; part, prearticular; san, surangular.
FIGURE 11 in A new early diverging thalattosuchian (Crocodylomorpha) from the Early Jurassic (Pliensbachian) of Dorset, U.K. and implications for the origin and evolution of the group
FIGURE 11. Phylogenetic placement of Turnersuchus hingleyae gen. et sp. nov. (in bold) with trees calibrated to stratigraphy. A, strict consensus of eight most parsimonious trees of 1774 steps (CI = 0.309; RI = 0.753) resulting from analysis based on the dataset of Wilberg et al. (2019); B, strict consensus of 165,888 most parsimonious trees of 1783 steps (CI = 0.403; RI = 0.834) resulting from analysis based on the dataset of Herrera et al. (2021).
FIGURE 12 in A new early diverging thalattosuchian (Crocodylomorpha) from the Early Jurassic (Pliensbachian) of Dorset, U.K. and implications for the origin and evolution of the group
FIGURE 12. Results of the Bayesian time-calibration analyses (95% HPD age ranges for each node indicated by horizontal bars). For visualization purposes, Crocodylia is omitted in both trees, even though representatives of the group were included in the analyses. A. time-scaled strict consensus resulting from analysis of the dataset based on Wilberg et al. (2019); B, time-scaled strict consensus resulting from analysis of the dataset based on Herrera et al. (2021) with the position of Eopneumatosuchus manually changed to fall within Protosuchidae.
FIGURE 2 in A new early diverging thalattosuchian (Crocodylomorpha) from the Early Jurassic (Pliensbachian) of Dorset, U.K. and implications for the origin and evolution of the group
FIGURE 2. Skull of Turnersuchus hingleyae gen. et sp. nov. (LYMPH 2021/45). A, digital model in dorsal view; B, line interpretation of same; C, digital model in ventral view; D, line interpretation of same. Abbreviations: bo, basioccipital; bsp, basisphenoid; ch g, choanal groove; fr, frontal; lef, lateral Eustachian foramen; lsp, laterosphenoid; mpf, median pharyngeal foramen; occ, occipital condyle; oto, otoccipital; pa, parietal; po, postorbital; pro, prootic; pt, pterygoid; qu, quadrate; qu mhc, quadrate medial hemicondyle; qu op, quadrate orbital process; sq, squamosal; tof, temporo-orbital foramen.
FIGURE 10 in A new early diverging thalattosuchian (Crocodylomorpha) from the Early Jurassic (Pliensbachian) of Dorset, U.K. and implications for the origin and evolution of the group
FIGURE 10. Appendicular bones of Turnersuchus hingleyae gen. et sp. nov. (LYMPH 2021/45). A, digital model of the right scapula and coracoid in lateral view; B, line interpretation of same; C, digital model of the proximal right humerus in medial view; D, right ulna in medial view; E, digital model of dorsal (caudal?) osteoderm in dorsal view. Abbreviations: co, coracoid; cf, coracoid foramen; dc, deltoid crest; dpc, deltopectoral crest; gl, glenoid fossa; hs, humeral shaft; ol, olecranon process; pt, pits; sc, scapula; scb, scapular blade; us, ulnar shaft.
FIGURE 1 in A new early diverging thalattosuchian (Crocodylomorpha) from the Early Jurassic (Pliensbachian) of Dorset, U.K. and implications for the origin and evolution of the group
FIGURE 1. Preserved material of Turnersuchus hingleyae gen. et sp. nov. (LYMPH 2021/45) including five main blocks and isolated elements.
FIGURE 4 in A new early diverging thalattosuchian (Crocodylomorpha) from the Early Jurassic (Pliensbachian) of Dorset, U.K. and implications for the origin and evolution of the group
FIGURE 4. Right retroarticular process of Turnersuchus hingleyae gen. et sp. nov. (LYMPH 2021/45). A, digital model and line interpretation in lateral view; B, digital model and line interpretation in medial view; C, digital model and line interpretation in dorsal view. Abbreviations: an, angular; art, articular; gf, glenoid fossa; p art, prearticular; san, surangular.
FIGURE 3 in A new early diverging thalattosuchian (Crocodylomorpha) from the Early Jurassic (Pliensbachian) of Dorset, U.K. and implications for the origin and evolution of the group
FIGURE 3. Skull of Turnersuchus hingleyae gen. et sp. nov. (LYMPH 2021/45). A, digital model in ventrolateral view; B, line interpretation of same; C, digital model in occipital view; D, line interpretation of same. Abbreviations: bo, basioccipital; bo t, basioccipital tuberosity; bsp, basisphenoid; ch g, choanal groove; cqc, cranioquadrate canal; fm, foramen magnum; fr, frontal; icf, internal carotid foramen; lsp, laterosphenoid; mpf, median pharyngeal foramen; occ, occipital condyle; oto, otoccipital; pa, parietal; po, postorbital; pro, prootic; pro p, prootic peg; pt, pterygoid; pts com, communication with paratympanic sinus; qu, quadrate; qu mhc, quadrate medial hemicondyle; qu op, quadrate orbital process; sq, squamosal; sq f, squamosal fossa; V, trigeminal foramen; vf, vagus foramen; XII, hypoglossal foramen.
Fig. 2 in New Early Jurassic sawflies from Luxembourg: the oldest record of Tenthredinoidea (Hymenoptera: "Symphyta")
Fig. 2. Interpretation of "Symphyta" family incertae sedis, MNHN−LP−R. 11199, hind wing. A. General habitus; scale bar 2 mm. B. Apex of Sc; scale bar 0.5 mm.
Fig. 4 in New Early Jurassic sawflies from Luxembourg: the oldest record of Tenthredinoidea (Hymenoptera: "Symphyta")
Fig. 4. Composite reconstruction of Pseudoxyelocerus bascharagensis gen. et sp. nov., holotype MNHN−LP−R. 11198; scale bar 2 mm.
Fig. 3 in Diversity dynamics of Early-Middle Jurassic brachiopods of Caucasus, and the Pliensbachian-Toarcian mass extinction
Fig. 3. Total species diversity changes, origination and extinction rates of NW Caucasus brachiopods in Early–Middle Jurassic.
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