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Utatsusaurus hataii, an Early Triassic Ichthyosaur from Japan, pencil drawing

Nothosaurus mirabilis, a Nothosaur from the Triassic of Europe, North Africa and Russia, pencil drawing

Nothosaurus mirabilis, a Nothosaur from the Triassic of Europe, North Africa and Russia, pencil drawing

Dentaries of selected European rhabdodontomorphs in dorsal and lateral views. (A) Obelignathus septimanicus, holotype MDE D30, right dentary from the 'Grès à Reptiles' Formation, Montouliers (France); (B) Mochlodon vorosi holotype MTM V 2010.105.1, left dentary from the Csehbánya Formation, Iharkút (Hungary; mirrored); (C) Mochlodon suessi, lectotype PIUW 2349/2, right dentary from the Grünbach Formation, Muthmannsdorf (Austria); (D) Zalmoxes robustus holotype NHMUK R3392, right dentary from the Sinpetru Formation, Sânpetru (Romania); (E) Rhabdodon priscus, lectotype MPLM 30, left dentary from the Marnes Rouges Inférieures Formation, la Nerthe (France; mirrored drawing after Matheron; outline based on specimens MPLM 30 and MPLM 31, size estimation based on Matheron and Brinkman); (F) Zalmoxes shqiperorum holotype NHMUK R4900, right dentary from the Sinpetru Formation of Sânpetru (Romania; outline based on the specimen UBB NVZ1-1).

Phylogenetic affinities of Saltriovenator and evolution of the hand in Theropoda. Reduced strict consensus of the shortest trees found by the phylogenetic analysis after pruning of Lewisuchus and Teleocrater. Numbers at nodes indicate decay index. Inferred manual phalangeal formula for selected nodes indicated below clade names. Hands of representative members of the avian stem (bold names) in extensor view (Herrerasaurus in flexor view), medial side at left, missing elements in white based on ancestral states inferred at least inclusive node containing the taxon. Red star indicates loss of metacarpal V, blue stars indicate multiple independent losses of metacarpal IV among tetanurans. Drawings by A. Cau.

Dryolestidan mammal Crusafontia amoae sp. nov., MPZ CC2−1 M4 or M5, holotype, from the site of Cuesta Corrales 2, Colladico Blanco level, El Castellar Formation, Galve, Teruel, Spain in, occlusal (A), mesial (B), labial (C), distal (D), and lingual (E) views. The schematic drawing of C. amoae, in the box in the lower left−hand corner shows the main anatomical elements of the occlusal surface of a dryolestidan.

Holotype of Khunnuchelys lophorhothon sp. nov. from Baybishe, northeastern Aral Sea region, Kazakhstan, Bostobe Formation, Santonian–early Campanian, Late Cretaceous, ZIN PH 5/55, a partial skull; in dorsal (A), ventral (B), lateral (C), and anterior (D) views. Photographs (A1–D1), explanatory drawings (A2–D2).

Original figure caption: Trackway S1 (Eosauropus sp.), here attributed to a sauropod trackmaker based on pedal synapomorphies; trackmaker is moving towards the south-west. Two consequtive pes impressions of a tridactyl Grallator [i.e. a theropod] trackway can be seen left to the S1 trackway. Note: The tracks are preserved on a bedding plane of a thin siltstone bed of the Late Triassic Fleming Fjord Formation of East Greenland. A) shows a photograph of the trackway(s) as preserved on the bedding plane (i.e. as concave epireliefs); B) shows a color shaded relief map based on a high-resolution photogrammetric 3D-model of the bedding plane; C) is an interpretative outline drawing of the S1 trackway; abbreviations: LM = left manus (i.e. forefoot), LP = left pes (i.e. hindfoot), RM = right manus, RP = right pes, numbers increase in walking direction.

Drawings of Dryolestida left upper−molar, modified from the original descriptions. A–C, Kimmeridgian; D–F, Tithonian–Berriasian; G–H, early Barremian; I, late Barremian. A. Left M4 or M5 of Comotherium richi Prothero, 1981, from the Upper Jurassic Morrison Formation, Como Bluff locality, Wyoming, USA. B. Right M5, reversed, of Dryolestes leiriensis Martin, 1999, from Guimarota, Portugal.C. Left M6 of Krebsotherium lusitanicum Martin, 1999, from Guimarota, Portugal. D. Right M4 or M 6 (reversed) of Portopinheirodon asymmetricus Martin, 1999, Porto Pinheiro, Lourinha, Portugal. E. Right M5 (reversed) of Laolestes andresi Martin, 1999, from Porto Pinheiro, Lourinha, Portugal. F. Right upper molar of Donodon perscriptoris Sigogneau−Russell, 1991, Anoual, Morocco.G. Left M4 orM5 of Crusafontia amoae sp. nov., holotype, Cuesta Corrales 2, El Castellar Formation, Galve, Teruel, Spain. H. Right M6 orM7 (reversed) of Crusafontia amoae sp. nov., first described as upper molar of Crusafontia cuencana by Krebs (1993), P−2 H4 Pelejón 2, Galve, Teruel, Spain. I. Left M2 or M3, of Crusafontia cuencana Henkel and Krebs, 1969, Uña, La Huérguina Formation, Cuenca, Spain, (from Krebs 1993). Scale bars 1 mm.

Thescelosaurus neglectus, an hypsilophodont from North America, pencil drawing

Shown is a drawing from Williston (1898) that shows the skeletons of three common species of mosasaurs from Kansas; Clidastes propython, Platecarpus tympaniticus and Tylosaurus proriger. Although these three species are shown about the same size in the drawing, in life, Clidastes was the smallest (about 12-15 feet); Platecarpus was the next largest (about 24 feet) and Tylosaurus was the largest (30 plus feet):

Drawing of the skull of MCZ 4374, the holotype of Macrosaurus proriger (Tylosaurus proriger) from Cope (1870)

Attenborosaurus conybeari, a plesiosaur from the Early Jurassic of England, pencil drawing

Attenborosaurus conybeari, a plesiosaur from the Early Jurassic of England, pencil drawing

Attenborosaurus conybeari, a plesiosaur from the Early Jurassic of England, pencil drawing

Simple drawing of Ankylosaurus magniventris, a North American Cretaceous ankylosaurid. Based on skeletal reconstruction in Paul 2010.