Early Jurassic

Fossil samples – e.g. ‘primitive’ bony fish (1, 2), a skull of a temnospondyl ‘amphibian’ (probably a metoposauroid) in dorsal view (3), a skull of an archosaur of the crocodile lineage (probably a phytosaur) in palatal view (4), holotype of the “gliding reptile” Icarosaurus siefkeri [1] (5) and Atreipus-Grallator-type dinosaur tracks (bottom right) – from the Newark Supergroup, i.e. a series of mainly Late Triassic to Early Jurassic sedimentary rocks of eastern North America ↑ Edwin H. Colbert: A gliding reptile from the Triassic of New Jersey. American Museum Novitates, 2230. American Museum of Natural History, New York 1966, digitallibrary.amnh.org, cf. fig. 3 therein.

Restoration of Pradhania gracilis from the Early Jurassic of India

Life restoration of the small German Jurassic ichthyosaur Hauffiopteryx typicus. References Maxwell, E. E.; Cortés, D. (2020). "A revision of the Early Jurassic ichthyosaur Hauffiopteryx (Reptilia: Ichthyosauria), and description of a new species from Southwestern Germany". Palaeontologia Electronica 23: 1–43. Archived from the original on 2022-07-06. Retrieved on 2022-03-15. Note: This image is currently uncolored

Ichthyosaurus communis, Early Jurassic of England. Digital.

Early Jurassic (Lias γ, Pliensbachian) ferruginous limestone (the bed below the hammer) and marl (the bed ‘behind’ the hammer) in the cap rocks of the oolithic iron ore deposit at the village of Rottorf am Klei, Lower Saxony, Germany, largely obscured by weathered material of the same rocks.

Fossil samples – e.g. ‘primitive’ bony fish (1, 2), a skull of a temnospondyl ‘amphibian’ (probably a metoposauroid) in dorsal view (3), a skull of an archosaur of the crocodile lineage (probably a phytosaur) in palatal view (4), holotype of the “gliding reptile” Icarosaurus siefkeri [1] (5) and Atreipus-Grallator-type dinosaur tracks (bottom right) – from the Newark Supergroup, i.e. a series of mainly Late Triassic to Early Jurassic sedimentary rocks of eastern North America ↑ Edwin H. Colbert: A gliding reptile from the Triassic of New Jersey. American Museum Novitates, 2230. American Museum of Natural History, New York 1966, digitallibrary.amnh.org, cf. fig. 3 therein.

Restoration of Early Jurassic environment preserved at the SGDS, with the theropod Dilophosaurus wetherilli in bird-like resting pose, demonstrating the manufacture of SGDS.18.T1 resting trace.

Adeopapposaurus mognai, Early Jurassic of Argentina. Digital.

Macroplata tenuiceps, a pliosaur from the Early Jurassic of Europe, pencil drawing

reconstruction of the Early Jurassic sauropod Perijasaurus lapaz.

Laurasia during the closure of the Iapetus Ocean at 430 Ma. Made using GPlates: Citations: Golonka, J. (2007), Late Triassic and Early Jurassic palaeogeography of the world, Palaeogeography, Palaeoclimatology, Palaeoecology, 244(1-4), 297-307. Müller, R., M. Sdrolias, C. Gaina, and W. Roest (2008), Age, spreading rates, and spreading asymmetry of the world's ocean crust, Geochemistry, Geophysics, Geosystems, 9(Q04006), 19. Seton, M., R. Müller, S. Zahirovic, C. Gaina, T. Torsvik, G. Shephard, A. Talsma, M. Gurnis, M. Turner, and M. Chandler (2012), Global continental and ocean basin reconstructions since 200 Ma, Earth-Science Reviews, 113(3-4), 212-270. Torsvik, T., and R. Van de Voo (2002), Refining Gondwana and Pangea Palaeogeography: Estimates of Phanerozoic non dipole (octupole) fields, Geophysical Journal International, 151(3), 771-794. Wright, N., S. Zahirovic, R. D. Müller, and M. Seton (2013), Towards community-driven, open-access paleogeographic reconstructions: integrating open-access paleogeographic and paleobiology data with plate tectonics, Biogeosciences, 10, 1529-1541

Laurasia during the closure of the Iapetus Ocean at 430 Ma. Made using GPlates: Citations: Golonka, J. (2007), Late Triassic and Early Jurassic palaeogeography of the world, Palaeogeography, Palaeoclimatology, Palaeoecology, 244(1-4), 297-307. Müller, R., M. Sdrolias, C. Gaina, and W. Roest (2008), Age, spreading rates, and spreading asymmetry of the world's ocean crust, Geochemistry, Geophysics, Geosystems, 9(Q04006), 19. Seton, M., R. Müller, S. Zahirovic, C. Gaina, T. Torsvik, G. Shephard, A. Talsma, M. Gurnis, M. Turner, and M. Chandler (2012), Global continental and ocean basin reconstructions since 200 Ma, Earth-Science Reviews, 113(3-4), 212-270. Torsvik, T., and R. Van de Voo (2002), Refining Gondwana and Pangea Palaeogeography: Estimates of Phanerozoic non dipole (octupole) fields, Geophysical Journal International, 151(3), 771-794. Wright, N., S. Zahirovic, R. D. Müller, and M. Seton (2013), Towards community-driven, open-access paleogeographic reconstructions: integrating open-access paleogeographic and paleobiology data with plate tectonics, Biogeosciences, 10, 1529-1541

The type specimen of the ichnogenus Cheliceratichnus, from the Early Jurassic East Berlin Formation of Holyoke, Massachusetts.

Bifurculapes laqueatus trackway (positive hyporelief, i.e. casts on the bottom surface of the bed) from the Early Jurassic East Berlin Formation (Hartford Basin) of Holyoke, Massachusetts (not the same specimen as this one). See coin (1 U.S. cent, 19.05 mm in diameter) for scale.

Bifurculapes laqueatus trackway (positive hyporelief, i.e. casts on the bottom surface of the bed) from the Early Jurassic East Berlin Formation (Hartford Basin) of Holyoke, Massachusetts (not the same specimen as this one). See coin (1 U.S. cent, 19.05 mm in diameter) for scale.

A trackway of the trace fossil Bifurculapes laqueatus (positive hyporelief, i.e. casts on the bottom surface of the bed) from the Early Jurassic East Berlin Formation (Hartford Basin) of Holyoke, Massachusetts (not the same specimen as this one). Scale is in cm.