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Fig. 11 in Two new stegosaur specimens from the Upper Jurassic Morrison Formation of Montana, USA

Fig. 11. Braincase of stegosaur GPDM 178, near Giffen, Cascade County, Montana; in anterior (A1), left (A2) and right (A5) lateral, dorsal (A3), posterior A4), and ventral (A6) views.

Fig. 7 in Two new stegosaur specimens from the Upper Jurassic Morrison Formation of Montana, USA

Fig. 7. Left premaxilla of stegosaur GPDM 178, near Giffen, Cascade County, Montana; in dorsal (A1), lateral (A2), medial (A3), and ventral (A4) views.

Fig. 6 in Two new stegosaur specimens from the Upper Jurassic Morrison Formation of Montana, USA

Fig. 6. Cranial elements of stegosaur GPDM 178, near Giffen, Cascade County, Montana, USA; in left (A1) and right (A2) lateral views; gray, missing elements.

Fig. 5 in Two new stegosaur specimens from the Upper Jurassic Morrison Formation of Montana, USA

Fig. 5. Left radius of stegosaur GPDM 205 from the 5E Ranch, Little Snowy Mountains, Fergus County, Montana, USA; in lateral (A1), medial (A2), anterior (A3), posterior (A4), dorsal (A5), and ventral (A6) views.

Fig. 1. A in Two new stegosaur specimens from the Upper Jurassic Morrison Formation of Montana, USA

Fig. 1. A. Map of the USA with indicated the state of Montana, were the stegosaur specimens GPDM 178 and GPDM 205 were found. B. Map of Montana with the extent of the Morrison Formation in green, and the general locations of GPDM 178 and GPDM 205 indicated by the Stegosaurus skull silhouettes modified from Maidment et al. 2018).

Fig. 18 in Two new stegosaur specimens from the Upper Jurassic Morrison Formation of Montana, USA

Fig. 18. Partial right tibia of stegosaur GPDM 178, near Giffen, Cascade County, Montana; in medial (A1, A6), lateral (A2, A7), anterior (A3, A5), dorsal (A4), and ventral (A8) views. A1–A4, proximal end, A5–A8, distal end.

Fig. 13 in Two new stegosaur specimens from the Upper Jurassic Morrison Formation of Montana, USA

Fig. 13. Left scapula of stegosaur GPDM 178, near Giffen, Cascade County, Montana; in dorsal (A1), ventral (A2), lateral (A3), anterior (A4), medial (A5), and posterior (A6) views.

Fig. 12 in Two new stegosaur specimens from the Upper Jurassic Morrison Formation of Montana, USA

Fig. 12. Cervical vertebra of stegosaur GPDM 178, near Giffen, Cascade County, Montana; in anterior (A1), left (A2) and right (A5) lateral, dorsal (A3), posterior (A4), and ventral (A6) views.

Fig. 9. Stegosaur GPDM 178 in Two new stegosaur specimens from the Upper Jurassic Morrison Formation of Montana, USA

Fig. 9. Stegosaur GPDM 178, near Giffen, Cascade County, Montana. A. Left dentary in dorsal (A1), medial (A2), lateral (A3), and ventral (A4) views. B. Right dentary in dorsal (B1), medial (B2), lateral (B3), and ventral (B4) views.

Fig. 3 in Two new stegosaur specimens from the Upper Jurassic Morrison Formation of Montana, USA

Fig. 3. Left humerus of stegosaur GPDM 205 from the 5E Ranch, Little Snowy Mountains, Fergus County, Montana, USA; in anterior (A1), posterior (A2), lateral (A3), medial (A4), dorsal (A5), and ventral (A6) views.

Fig. 16 in Two new stegosaur specimens from the Upper Jurassic Morrison Formation of Montana, USA

Fig. 16. Left ulna of stegosaur GPDM 178, near Giffen, Cascade County, Montana; in medial (A1), posterior (A2), lateral (A3), dorsal (A4), and ventral A5) views.

Fig. 15 in Two new stegosaur specimens from the Upper Jurassic Morrison Formation of Montana, USA

Fig. 15. Left humerus of stegosaur GPDM 178, near Giffen, Cascade County, Montana; in anterior (A1), posterior (A2), lateral (A3), medial (A4), dorsal (A5), and ventral (A6) views.

Fig. 20 in Two new stegosaur specimens from the Upper Jurassic Morrison Formation of Montana, USA

Fig. 20. Stegosaur humeral lengths (measurement from Gilmore 1914, Galton 1982a, and Maidment et al. 2018). The grading colors represent the transitions from the smallest to largest specimens. Circles, Stegosaurus; triangles, Stegosauria indeterminate; squares, Hesperosaurus.

Fig. 4 in Two new stegosaur specimens from the Upper Jurassic Morrison Formation of Montana, USA

Fig. 4. Left ulna of stegosaur GPDM 205 from the 5E Ranch, Little Snowy Mountains, Fergus County, Montana, USA; in anterior (A1), posterior (A2), lateral (A3), medial (A4), dorsal (A5), and ventral (A6) views.

Fig. 2 in Two new stegosaur specimens from the Upper Jurassic Morrison Formation of Montana, USA

Fig. 2. Skeletal reconstruction of the stegosaurs GPDM 178 (A) and GPDM 205 (B) scaled together based on humeral lengths. Black, elements preserved in each specimen; gray, missing elements. Hesperosaurus reconstruction by Genya Masukawa (Ibaraki University, Japan). Human scale is the Artemision Bronze featuring the deity of Zeus as 1.83 m in height.

Fig. 18 in Two new basal coelurosaurian theropod dinosaurs from the Lower Cretaceous Sao Khua Formation of Thailand

Fig. 18. Strict consensus trees of all the recovered MPTs of the phylogenetic analyses from the present study (modified from Apesteguía et al. 2016). A. Data matrix including Phuwiangvenator yaemniyomi gen. et sp. nov. B. Data matrix including Vayuraptor nongbualamphuensis gen. et sp. nov.

Fig. 11 in Two new basal coelurosaurian theropod dinosaurs from the Lower Cretaceous Sao Khua Formation of Thailand

Fig. 11. Coelurosaurian theropod Phuwiangvenator yaemniyomi gen. et sp. nov. from the Early Cretaceous Sao Khua Formation of Phu Wiang, Khon Kaen Province, Thailand. SM-PW9B-1, left metatarsal I in lateral (A1), posterior (A2), anterior (A3), and medial (A4) views.

Fig. 8 in Two new basal coelurosaurian theropod dinosaurs from the Lower Cretaceous Sao Khua Formation of Thailand

Fig. 8. Coelurosaurian theropod Phuwiangvenator yaemniyomi gen. et sp. nov. from the Early Cretaceous Sao Khua Formation of Phu Wiang, Khon Kaen Province, Thailand. A. SM-PW9B-41, right tibia in anterior (A1), lateral (A2), posterior (A3), medial (A4), proximal (A5), and distal (A6) views. B. SM-PW9B-40, proximal left tibia in lateral view. Arrow indicates vertical ridge on the tibia.

Fig. 3 in Two new basal coelurosaurian theropod dinosaurs from the Lower Cretaceous Sao Khua Formation of Thailand

Fig. 3. Coelurosaurian theropod Phuwiangvenator yaemniyomi gen. et sp. nov. from the Early Cretaceous Sao Khua Formation of Phu Wiang, Khon Kaen Province, Thailand. A. SM-PW9A-1, atlantal intercentrum in anterior (A1) and posterior (A2) views. B. SM-PW9B-12, dorsal vertebra in left lateral (B1), anterior (B2), ventral (B3), and posterior (B4) views.

Fig. 1 in Two new basal coelurosaurian theropod dinosaurs from the Lower Cretaceous Sao Khua Formation of Thailand

Fig. 1. Three hypotheses of the phylogenetic position of Megaraptora. Megaraptora as derived Carcharodontosauria (Benson et al. 2010; Carrano et al. 2012); basal Coelurosauria (Novas et al. 2015; Apestiguea et al. 2016; Delcourt and Grillo 2018); and basal Tyrannosauroidea (Novas et al. 2012a, 2013; Porfiri et al. 2014; Cau 2018). The tree is modified from Ezcurra and Novas (2016). Bolded are theropods found in Thailand.